(DETAILED INVITATION FOR EXPRESSION OF INTEREST)

INVITATION FOR EXPRESSION OF INTEREST (EOI)

FOR

CARRYING OUT SCR/ SNCR/ HYBRID (SCR + SNCR) SYSTEM PILOT/

DEMONSTRATION TEST AT NTPC LIMITED

EOI No.: CS-0000-407B-9

Date: 20/10/2016

1.0INTRODUCTION

NTPC had issued EOI (i.e. EOI No.: CS-0000-407A-9 on 24/02/2016) in which willingness to carryout pilot/ demonstration test of Selective Catalytic Reduction(SCR)/ Selective Non Catalytic Reduction(SNCR) system from various SCR/ SNCR system supplier/ manufacturer was asked. In response to the EOI many manufacturer/ supplier of SCR/ SNCR system shown their interest to carryout SCR/ SNCR/ SCR & SNCR system pilot test at NTPC unit at their own expense.

Subsequent to the EOI, NTPC is issuing this EOI to seek willingness of all reputed agencies(Boiler manufacturer and SCR / SNCR/ Hybrid NOx emission control technology suppliers) who have not participated in the earlier Expression of Interest issued by NTPC i.e. EOI No.: CS-0000-407A-9 on 24/02/2016.

Applicant already submitted their application in response to earlier EOI (EOI No.: CS-0000-407A-9 dated 24/02/2016) need not to apply under this EOI.

2.0ELIGIBILITY

Agencies who meet any of the following criteria are invited to submit their willingness to carry out the pilot/ demonstration test:

(i)Manufacturer of Steam Generator of units of capacity of 200MW or above.

(ii)Agencies who have supplied/executed contract for retrofitting jobs of NOx emission control operating at any one single power plant successfully for one year.

(iii)Indian agencies who have tie ups with foreign agencies who have the capabilities as at (i) or (ii) above.

EXPRESSION OF INTEREST (EOI)

FOR

CARRYING OUT SCR/ SNCR/ SCR & SNCR SYSTEM PILOT/

DEMONSTRATION TEST AT NTPC LIMITED

(iv)Indian subsidiaries/ Indian Joint ventures/ Indian promoters of JV companies of foreign agencies who jointly meet the capabilities as at (i) or (ii) above.

3.0BREIF SCOPE OF WORK

The scope of work for SCR/ SNCR/ Hybrid (SCR + SNCR) system pilot/ demonstration test shall include but not be limited to following:

a)For SCR system Pilot Testing:

Engineering, Supply, Erection, commissioning and operation of the SCR test pilot plant and restoration of NTPC unit after dismantling of pilot plant as per the stipulations of Common Test Procedure for SCR system pilot testing.

b)For SNCR system Demonstration Test:

Engineering, Supply, Erection, commissioning and operation of the SNCR Demonstration test set up and, restoration of NTPC unit after dismantling of test set up as per the stipulations of Common Test Procedure for SNCR system pilot testing.

c)For SCR as well as SNCR system testing

As per a) & b) above and as per Common Test Procedure for Hybrid (SCR + SNCR) system pilot testing.

4.0QUALIFICATION CRITERIA FOR UPCOMING NTPC DeNOx SYSTEM TENDERS

For the upcoming NTPC tenders for procurement of NOx control equipments, it will be mandatory that only those Vendors/Agencies shall be allowed to participate who have successfully conducted the pilot tests as per the common pilot test procedure for the particular De-NOx system (i.e. SCR or SNCR or Hybrid system) which it proposes to offer. However, in case the Vendor/ Agencies already has previous experience of supplying De-NOx system for the high ash coal/bigger size units, it can be allowed to participate even without conducting the pilot plant testing with high ash Indian coal provided they satisfy the following requirements;

i)SCR System

Vendor/Agencies has supplied SCR system for pulverised coal fired steam generators with SCR inlet dust burden not less than 55 gram per NM3 and such SCR system should be in successful operation for atleast one (1) year in a 500MW size pulverised coal fired unit.

EXPRESSION OF INTEREST (EOI)

FOR

CARRYING OUT SCR/ SNCR/ SCR & SNCR SYSTEM PILOT/

DEMONSTRATION TEST AT NTPC LIMITED

ii)SNCR System

Vendor/ Agencies has previous experience of supplying urea based SNCR system for atleast 500MW size pulverized coal fired units and such SNCR system should be in successful operation for atleast one

(1) year.

iii)Hybrid (SCR + SNCR) System

Vendor/ Agencies should have previous experience of supplying hybrid system for control of NOx for a pulverised coal fired plant of atleast 500MW capacity with minimum SCR inlet dust burden of 55 grams/ Nm3 and such hybrid system should be in successful operation for atleast one (1) year.

Alternatively, such Vendors/ Agencies may also be exempted from conductance of the pilot test who have previous experience of supplying hybrid DeNOx system for a coal fired power plant. In addition the vendor/ agency should have also supplied SCR & SNCR system meeting requirements stipulated at clause no (i) & (ii) above respectively. Further, these SCR & SNCR systems (if not installed in the coal fired hybrid plant) could also have been installed in some other plant or in two different plants separately.

Irrespective of the above, the Vendors/ Agencies would be required to meet the project specific Qualifying Requirements as finalised by the QR committee.

5.0DOWNLOAD AND SUBMISSION OF EXPRESSION OF INTEREST (EOI) FOR CARRYING OUT SCR/ SNCR/ SCR & SNCR SYSTEM PILOT/ DEMONSTRATION TEST AT NTPC LIMITED

Interested agencies may download the documents of EXPRESSION OF INTEREST (EOI) FOR CARRYING OUT SCR/ SNCR/ SCR & SNCR SYSTEM PILOT/ DEMONSTRATION TEST AT NTPC LIMITED free of cost from www.ntpctender.com.The applicants/ agencies are required to submit their duly filled Consent Letter alongwith necessary documents through e-mail to pkgupta02@ntpc.co.in/ itisur@ntpc.co.in on or before 31.10.2016 (1500 hrs (IST)).

6.0ADDRESS FOR COMMUNICATION

AGM (PE-Mech/SG),

NTPC Limited, Fifth Floor, Engineering Office Complex,

A-8A, Sector-24, NOIDA,

EXPRESSION OF INTEREST (EOI)

FOR

CARRYING OUT SCR/ SNCR/ SCR & SNCR SYSTEM PILOT/

DEMONSTRATION TEST AT NTPC LIMITED

INSTRUCTIONS TO APPLICANTS

1.0DOCUMENTS OF EOI

The EOI documents shall comprise of the following sections:

(i)Section-I: Invitation for Expression of Interest

(ii)Section-II: Instructions to Applicants

(ii) Section-III: Application Forms, Schedules & Attachments

2.0Documents comprising the Application

The application of EOI shall comprise the following:

A) Form of Application: The form of application shall indicate willingness of applicant to participate in the appropriate De-Nox system test. Format of application is enclosed with this document.

B) Schedules: Applicants to EOI are required to furnish the following documents alongwith their application:

	SN	Schedule	Description
	1	Schedule-1	Company profile and Organization Structure
	2	Schedule-2	Experience details of the Company for the various
			DeNOx technologies for new plants and retrofitted
			plants.
	3	Schedule-3	Turnover of the company in last three financial
			years and networth of the Company
	4	Schedule-4	Consent Letter
	5	Schedule-5	Acceptance of Fraud Prevention Policy of NTPC
	6	Schedule-6	Any other information
C) Attachments:
	SN	Attachment	Description
	1	Attachment-1	Common Test Procedure for SCR Pilot Test
	2	Attachment-2	Common	Test	Procedure	for	SNCR
			Demonstration Test
		EXPRESSION OF INTEREST (EOI)
			FOR
		CARRYING OUT SCR/ SNCR/ SCR & SNCR SYSTEM PILOT/
		DEMONSTRATION TEST AT NTPC LIMITED

3	Attachment-3	Common Test Procedure for Hybrid System (i.e.
		SCR + SNCR) Pliot/ Demonstration Test
4	Attachment-4	SCR system Test Protocol Format
5	Attachment-5	SNCR system Test Protocol Format
6	Attachment-6	Hybrid System (SCR + SNCR) Test Protocol
		Format
7	Attachment-7	Essential document to be submitted at the time of
		protocol signing.

3.0Submission of Application of EOI

The application of EOI shall be submitted in the following manner:

(i)The Form of Application shall be submitted on the letter head of the company.

(ii)The Schedules shall be submitted in one single file.

(ii)The credentials/ supporting documents shall be submitted in pdf file format. (The applicants are advised to combine all credentials/ supporting documents in single pdf file).

The above mentioned documents shall be submitted through e-mail to pkgupta02@ntpc.co.in / itisur@ntpc.co.in . No manual or hard copy submission shall be accepted.

4.0Deadline for submission of Application of EOI

The application of EOI must be submitted through e-mail on or before 31.10.2016 (1500 hrs (IST)).

5.0Other important points

a)After submission of Consent Letter, Applicant(s) will be required to come to NTPC Limited, Sector-24 Noida (UP) India office for Test Protocol Signing. The date for protocol signing shall be intimated to applicants separately.

b)Based on applicant’s willingness to carry out SCR/ SNCR/ Hybrid SCR & SNCR pilot/ demonstration test, applicant will be required to sign the following document alongwith the Test Protocol:

Willingness to carry out	Documents required to be signed
SCR Test Only	SCR Test Protocol* and Common Test Procedure for
	SCR
SNCR Test Only	SNCR Test Protocol* and Common Test Procedure

EXPRESSION OF INTEREST (EOI)

FOR

CARRYING OUT SCR/ SNCR/ SCR & SNCR SYSTEM PILOT/

DEMONSTRATION TEST AT NTPC LIMITED

SECTION-III: FORM OF APPLICATION & SCHEDULES

FORM OF APPLICATION

(To be submitted on Company’s Letter Head)

Ref No.

Date:

AGM (PE-Mech/SG)

NTPC Limited,5th Floor, Engineering Office Complex,

A-8A, Sector – 24, Noida,

Distt. Gautam Budh Nagar

Uttar Pradesh, INDIA 201301

Dear Sir,

Sub: Expression of Interest (EOI) for “Retrofitting of NOx Emission Control System for various NTPC plants”.

We, the undersigned, express our interest for the subject EOI and declare the following:

(a)We are duly authorized to represent and act on behalf of _____________

(name of the firm).

(b)We have examined and have no reservations to the EOI document including Amendment No(s) & Clarification No(s)_________ (if any).

(c)With reference to your invitation for EOI dated _________, we are furnishing herewith all the required details as per the prescribed Schedules.

(d)We here by express our willingness to conduct pilot/ demonstration of our SCR/ SNCR/ SCR & SNCR system.

(e)NTPC and /or its authorized representatives are hereby authorized to conduct any inquiries or investigations to verify the statements, documents and information submitted in connection with this application, and to seek

clarifications from our bankers and clients. This application will also serve as

EXPRESSION OF INTEREST (EOI)

FOR

CARRYING OUT SCR/ SNCR/ SCR & SNCR SYSTEM PILOT/

DEMONSTRATION TEST AT NTPC LIMITED

authorized on for any individual or authorized representative of any institution referred to in the supporting information, to provide such information deemed necessary and as requested by NTPC.

(f)NTPC and /or its authorized representatives may contact the following nodal persons for further information on any aspects of the application:

Name and designation of	Address for	Telephone	Email
contact Person	Communication	No	ID

(g)This application is made in the full understanding that:

1.Through this EOI, NTPC intends to carry out SCR/SNCR/SCR & SNCR pilot/ demonstration test for system supplied by various suppliers/ manufacturers (at applicants own expenses) in order to assess performance of these system for high ash Indian coal.

2.EOI process will be subject to verification of all information submitted at the discretion of NTPC.

3.NTPC reserves the right to reject or accept any or all applications, cancel the EOI process without any obligation to inform the applicant about the grounds of same.

(h)We declare that we have read and abide by the provisions of Fraud Prevention Policy of NTPC and submit the Form of Acceptance of Fraud Prevention Policy duly filled as per NTPC’s format.

(i)The undersigned declare that the statements made and the information provided in the duly completed application are complete, true and correct in every detail.

Name :

In the Capacity of:

Signed

Duly authorized to sign the application for and on behalf of:

Date:

EXPRESSION OF INTEREST (EOI)

FOR

CARRYING OUT SCR/ SNCR/ SCR & SNCR SYSTEM PILOT/

DEMONSTRATION TEST AT NTPC LIMITED

Schedule-4

CONSENT LETTER

To,

NTPC Limited

Subject: Consent for conducting the Pilot/ Demonstration test of SCR/ SNCR/ Hybrid (SCR + SNCR) system inline with the stipulations of Common Test Procedure.

We..............................................	(Name of the company) having our Corporate Office
at......................................................	(Address of company) hereby confirm that we

will conduct the Pilot/ Demonstration test of SCR/ SNCR/ SCR & SNCR* system as per the stipulations of the Common Test Procedure for SCR/ SNCR/ SCR & SNCR* system and Terms & Conditions specified.

Further, we confirm that we will furnish all the documents as indicated in the common test procedure at the time of protocol signing.

The Proposed Schedule for the test will be as follows:

Description	Date (in DD/MM/YYYY)
	SCR	SNCR
Signing of Test Protocol	Considering 16.11.2016	Considering 16.11.2016
Engineering, Fabrication &Supply
Supply, Erection& Commissioning**
Main Test (06 months)
Optimization (preferable) & Extended
Test (06 months)
Restoration

** Commissioning date shall be considered for unit allocation.

Name &Sign .................................

(Authorised Signatory)

Date:...............................................

Company Name:.............................

Address:..........................................

EXPRESSION OF INTEREST (EOI)

FOR

CARRYING OUT SCR/ SNCR/ SCR & SNCR SYSTEM PILOT/

DEMONSTRATION TEST AT NTPC LIMITED

ATTACHMENT-1

COMMON TEST PROCEDURE FOR SLIP STREAM PILOT TEST OF SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM

DOC NO- 0000-999-01 REV- 00

16.09.2016

Common test procedure for SCR pilot test

Doc no. 0000-999-01 Rev- 00

1|P a g e

Common Test Procedure for slip stream pilot test of Selective catalytic reduction (SCR)

System

1.0 BACKGROUND

Govt. of India has revised environmental norms on 7th Dec 2015 wrt various pollutants from thermal power plants. As per the revised environmental norms, Plants installed after 2016 will be required to limit NOx emission below 100mg/Nm3.Presently, SCR System is the preferred technology for controlling NOx emissions from coal-fired power plants, particularly when high levels of reduction(i.e. 80 90%) are required. It is expected that SCR system is required to be installed in all thermal power plants which will be installed after Dec 2016 in order to meet new environmental norm. However, SCR technology is not proven for high inlet dust burden and coal containing higher quantity of abrasive ash. Due to high ash (which is also abrasive in nature)content in Indian coal, SCR system is expected to face specifically high inlet dust burden, high erosive environment and presence of various poisoning elements. Further, concentration of poisoning element will be high because of higher specific coal consumption due to lower GCV of Indian coal. Moreover conversion of SO2 to SO3 in SCR catalyst leads to corrosion related problem in downstream power plants equipments like APH, ESP & Chimney etc.,

In view of the above, it becomes necessary to conduct a slip stream pilot test for SCR in some of the coal fired power plants before going to install a full fledge SCR system, in order to make compatible/ optimised design of SCR system wrt Indian coal & condition being offered by various suppliers. Hence, it is decided to carry out slip stream pilot test for SCR system at some of the coal fired thermal power plants with willing SCR system suppliers.

In order to meet the above requirement, a COMMON TEST PROCEDURE is required and all willing applicants will be required to conduct the Slip stream pilot test for SCR system as per the common test procedure, so that performance of various SCR systems including catalyst can be assessed wrt Indian coal at common platform.

2.0 PURPOSE

Selection and design parameters of SCR system and catalyst(s) for desired mechanical and chemical life, Performance of SCR system and catalyst like NOx reduction efficiency with stipulated maximum ammonia slip, Catalyst plugging, Catalyst deactivation & management, SO2 to SO3 conversion etc. suitable for high ash Indian coal.

Further, it is expected that due to small size pilot test set up, installation of actual ammonia injection grid (AIG) and actual de-dusting system may not be possible. However, as the pilot test system arrangement is similar to actual arrangement and will be subjected to similar condition(s) as that of actual, hence, effect of high abrasive ash in Indian coal on SCR system component from erosion point of view will be seen during the pilot test.

To meet the above purpose a slip stream (Flue Gas) will be tapped off from the economiser outlet of the Steam Generator of an existing unit to the Pilot plant and the treated flue gas from the pilot plant will be returned back to APH outlet.

Common test procedure for SCR pilot test

Doc no. 0000-999-01 Rev- 00

2|P a g e

3.0 OBJECTIVE

In order to ascertain the above purpose, selection & design of SCR system suitable for Indian coal(s) objective of the slip stream pilot plant for SCR System will be as follows. The test shall be carried out for a minimum period of six (06) months by continuously passing flue gas flow through SCR reactor with continuous Ammonia injection.

i)Performance evaluation of NOx reduction efficiency with limiting maximum ammonia slip, flue gas pressure drop across the reactor.

ii)To assess mechanical life of catalyst and SCR system Components.

iii)To assess chemical life of Catalyst and catalyst management plan.

iv)Performance evaluation of catalyst: Erosion, Plugging, Deactivation, SO2 to SO3 conversion.

v)To assess the design parameters including component material for SCR system.

vi)To assess the design parameter of catalyst: Type, pitch, face velocity, composition, Physical properties, volume and space velocity for Indian coal composition.

vii)Various catalysts deactivation mechanisms (i.e. masking, plugging, poisoning, sintering, erosion, etc.), catalyst deactivation rate assessment and identification of operating variables impacting the same for Indian coal(s).

viii)To assess the impact of SCR system on APH performance due to Ammonium bisulphate (ABS)/ Ammonium sulphate formation.

ix)To assess various utility consumption including reagent.

x)Design criteria for mixing devices and ammonia injection grid.

xi)Conductance of following optional optimization tests to assess the impact of several variables on the design and performance of the SCR System

a)Impact of flue gas volume flow rate, flue gas temperature, fuel change, ash loading, ammonia slip, SO2 to SO3 conversion on catalyst design and its performance.

b)Impact of temperature range for reagent injection and other parameters on ammonia slip & SO2 to SO3 conversion

c)Optimization of catalyst volume & flue gas velocity inside the reactor and pressure drop across reactor with respect to required life.

d)Performance of SCR system after installation of pre dust collector (If envisaged).

Based on the pilot test results, applicant will have to extrapolate the results and predict the chemical and mechanical life of catalyst for selection and design of full scale SCR system & its components, de-dusting/ dust cleaning system and catalyst for Indian coal(s) condition.

4.033/, 7¶6 SCOPE OF WORK

4.1The complete supply, erection, commissioning & operation of the small pilot level SCR demonstration/ pilot plant including all required instrumentation is in the scope of applicant.

Common test procedure for SCR pilot test

Doc no. 0000-999-01 Rev- 00

3|P a g e

For the test, applicant has to take slip stream (around 1500 Nm3/hr) from economiser outlet GXFWRIRZQHU¶VVWH PJHQHU tor and connect the return duct to suitable location as per test

arrangement (indicative) given at drawing no.0000-POM-A-01 Rev-A. Applicant has to conduct the pilot test as per this COMMON TEST PROCEDURE at their own cost. Owner will provide only consumable/ utilities (i.e. Power, water, auxiliary steam, and compressed air for instruments) required during the test. Estimated required quantity of consumables is to be indicated by applicant in Annexure-II. However, Final quantity of consumables along with its Terminal point will be discussed and mutually agreed. Regarding reagent, owner will provide Anhydrous Ammonia cylinders and applicant has to provide manifold for connecting cylinders to use the same for their SCR system.

)XUWKHU SSOLF QW¶VVFRSHalso includes UHVWRU WLRQRIWKH2ZQHU¶VSO QWas per original after completion of test and dispatch of their equipment from the Owners site. Applicant will have to depute required manpower for conductance of the pilot test and maintenance of the test plant.

4.2$SSOLF QW¶V Scope of supply and services shall include but not limited to following:

a)Supply of equipment.

b)Duct for supply of flue gas from economiser outlet to the SCR pilot plant along with flow straightener and dampers.

c)Ammonia injection and distribution system from ammonia manifold.

d)SCR reactor including catalysts.

e)Catalyst de-dusting system.

f)Rotary regenerative pilot Air pre-heater with motor and cleaning system

g)Duct for return of flue gas from SCR pilot plant outlet to the boiler including dampers.

h)Induced draft fan OR Ejector with Air Compressor.

i)Steel support structure along with ladders and landing bay (as required).

j)Electrical equipment, cable and wiring required for the unit.

k)Control & Instrumentation

l)Measurement equipment for gas flow, temperature and pressure.

m)Online gas analysers for NOx, SO2, H2O, O2 and NH3 etc measurement for control and monitoring based on the process requirements

n)Insulation.

o)Coolers (as required).

p)Power connection including MCB etcIURPRZQHU¶VVRXUFH

q) &RQVXP OHV QG XWLOLW\ FRQQHFWLRQ IURP RZQHU¶V VRXUFH V SHU PXWX OO\ JUHHG Terminal point.

r)Special Tools (if any)

s)Other items (if any)

t)Any Personal Protective Equipment (PPE) required for operator/ executive working with Ammonia in the pilot plant.

Common test procedure for SCR pilot test

Doc no. 0000-999-01 Rev- 00

4|P a g e

u)Any other safety measures required to ensure safety of the personnel working with Ammonia in the pilot plant.

v)Measurement of change in Acid dew point temperature due to catalyst activity.

w)Ammonia slip measurement in Ash sample

x)Procedure to measure Ammonia slip (grid arrangement in duct)

y)Restoration after pilot test as per original and restoration of any damage if occurred during the pilot test as per original.

Note:

Only the steady state measured value of the flue gas constituents and flue gas flow rate shall be considered for analysis.

4.3Applicant has to design their pilot SCR system in such a way that installation of the same at site will require very less shut down time of the steam generator. Further, such shut down time will be limited to maximum 03 days. In view of this, in case some installation work will

requires beyond the above time then applicant shall carry out remaining work by taking

³ 27 :2 ´ permit (i.e. main Steam Generator in operation) for completion of the installation. In such a case, applicant needs to take all necessary safety measures to avoid any accident/ hazard.

5.0GUIDELINES FOR DESIGN OF PILOT TEST ARRANGEMENT

In the proposed slip stream test facility, flue gas stream from the economiser outlet is introduced into the pilot SCR reactor. Anhydrous ammonia will be used as the reagent. The ammonia shall be injected continuously in the flue gas stream through ammonia injection grid/nozzle upstream of the pilot SCR reactor. Flue gas coming out of the reactor shall be returned back through the pilot air pre-heater to APH O/L.

An indicative schematic diagram of the SCR slipstream pilot test set up is enclosed as Drg. No. 0000-999-POM-A-01. Applicant has to design their test set up considering the diagram & following points:

a)Applicant has to design SCR slip stream pilot plant components and arrangement similar to the Full scale SCR system as far as possible. Further, Applicant shall select the catalyst for the test based on their experience to suit high ash Indian coal(s) & conditions(s) which they likely to offer for full scale SCR in future.

b)Flue gas shall be tapped off from the economiser outlet so that ash concentration in slip stream shall be maximum. For this purpose, Applicant to take various readings across the plane of the duct for finalisation of location of the tapping point inside the duct to get desired dust burden in the slip stream.

c)A flap at the inlet of flue gas to SCR system shall be provided, as indicated in the drawing enclosed in order to maintain the desired ash concentration in the flue gas to the pilot plant test reactor. However, the applicant may provide some other suitable method in place of flap to vary ash concentration in the flue gas to the pilot plant.

Common test procedure for SCR pilot test

Doc no. 0000-999-01 Rev- 00

5|P a g e

d)A view glass of minimum 5 cm diameter shall be provided along with a view glass cleaning device and proper lighting in the flue gas duct/pipe, to view the flow of flue gas to the pilot plant. View glass cleaning device and lighting has to be maintained for proper visibility.

e)Flue gas can be drawn from the economiser outlet by using any of the following options:

i.A fan shall be installed on the downstream of the SCR reactor to extract flue gas to the pilot plant test reactor. Draft fan shall be provided with inlet guide vane control / inlet damper or variable frequency drive to control the flue gas flow through the reactor. To safeguard the fan from erosion due to heavily dust laden and high temperature flue gas, ambient air can be mixed in the flue gas at the fan suction, if required.

ii.An ejector driven by compressed air shall be installed on the downstream of the SCR reactor to extract flue gas to the pilot plant reactor. Applicant shall also provide air compressor for meeting the compressed air requirement for the ejector.

f)A rotary regenerative type pilot air preheater shall be installed on the downstream of the SCR reactor. Flue gas shall flow through the pilot air preheater and shall be cooled by cooling air, circulated through the pilot air preheater by means of a circulating air fan. For cleaning of the pilot air preheater, compressed air/steam driven soot blower shall be utilised.

g)The entire pilot plant including ductwork, reactor section, pilot air preheater shall be thermally insulated so that there should not be any drop in temperature. Further, external heating of the catalyst is not permitted.

h)The reactor section shall consist of mainly three components, flue gas flow-straightener, catalyst and catalyst de-dusting system. The reactor shall be designed in such a way that it is possible to access each catalyst layers of the reactor.

Catalyst:

(i)Total volume of the catalyst shall be as per the requirement of NOx reduction efficiency. Number of catalyst layers will be decided accordingly. However, the applicant has to furnish the calculation for the catalyst volume selected for the test, before the start of the test.

(ii)Applicant has to keep provision for installation of additional layer, if required, during the test.

(iii)Proper arrangement shall be made in the design of the reactor for taking the sample during the test.

Catalyst de-dusting system:

(i)For cleaning of the catalyst during the test adequate number of cleaning device(s) (such as Soot blower, sonic horn etc.) shall be provided.

Common test procedure for SCR pilot test

Doc no. 0000-999-01 Rev- 00

6|P a g e

i)Flue gas supply and return duct shall be provided with isolation gates. During the shutdown of the steam generator, portion of the duct/pipe on the upstream of the supply line isolation gate and downstream of the return line isolation gate shall be erected and the gates shall be closed. Remaining erection activity can be carried out with the steam generator in service.

j)Other additional equipment required for optimisation & other study such as flue gas cooler, dust collector, etc. shall be installed in the flue gas supply and/or return bypass duct/pipe along with isolation gate/damper.

k)Back-up Plan: In order to complete the test in the stipulated time limit, Applicant shall be ready with back-up plan, which shall be implemented in case of failure/ non-performance of any of the component of their test system (such as nozzle, catalyst, fan impeller etc.) based on intermediate observations/ readings being taken during the test. In view of this, Applicant shall keep provision for back-up plan in the original design of the pilot test set up in order to accommodate any change required in the design of the system. Before start of test, Applicant shall furnish Intermediate acceptance criteria for continuation of the pilot test at the end of 1500hrs and 3000hrs as per Annexure-III.

Based on above, Applicant shall submit tentative layout plan of pilot plant at Annexure-I at the time of test protocol signing.

6.0 TEST PROCEDURE

After commissioning, Applicant may conduct trial run/ preliminary test, in order to assess the pilot test performance. The trial period shall not be more than 2 weeks. After completion of trial period (if applicable) Applicant shall declare the set-up ready & start the pilot test jointly.

Applicant shall furnish all the necessary documents specified at Annexure-VII to the Owner before commencement of the pilot test.

Testing of the slip stream SCR pilot plant components including catalyst, can be broadly divided into following categories:

	TEST	TESTING PERIOD
	Main test	6 months (4400hrs)
	Optimization(Preferable)& Extended test	6 months (4400hrs)
	(after completion of Main test)
	a) Main Test

Common test procedure for SCR pilot test

Doc no. 0000-999-01 Rev- 00

7|P a g e

(i)Applicant shall establish the various parameters as per the TEST CONDITION specified below at Cl No. 8 of this document before commencement of the test.

(ii)During the test, flue gas shall flow (around 1500 Nm³/hr.) continuously through the pilot plant reactor for the entire test period, excluding the period of catalyst changeover, sampling or other modifications.

(iii)Flue gas flow through the reactor should be established and after achieving stable flue gas flow & temperature (as mentioned in test condition), ammonia injection shall be started. Ammonia injection shall be done continuously and shall be controlled automatically according to the flue gas temperature and required outlet NOx concentration. During ammonia injection, inlet & outlet NOx level and ammonia slip at outlet of Reactor shall be continuously measured.

(iv)ABS formation in pilot APH shall be studied by passing the flue gas through pilot APH and cooling it by cooling air, circulated through the pilot air preheater by means of a circulating air fan.

(v)Measurement of various parameters during the test as per Annexure-VI shall be taken jointly.

(vi)Catalyst de-dusting shall be done during the entire pilot test period at regular intervals based on requirement, to prevent catalyst chocking and minimize the flue gas differential pressure across the pilot plant. During operation of the SCR slipstream system de-dusting frequency and pressure drop across the catalyst shall also be monitored and recorded.

(vii)Pilot air preheater soot blowing shall be done during the entire pilot test period at regular intervals based on requirement. During operation of the SCR slipstream system, soot blowing frequency and pressure drop across the pilot air preheater shall also be monitored and recorded.

(viii)Visual inspection of complete SCR pilot plant including pilot air preheater shall be done at 1500 hrs. & Visual inspection of complete SCR pilot plant including pilot air preheater along with Catalyst sampling shall be done at 3000 hrs. & 4400 hrs. of operation for detail analysis in the mutually agreed lab. ABS deposited in pilot APH shall be analysed for determination of its composition at the end of 4400 hrs of operation.

(ix)In case parameters goes beyond acceptable limits (as furnished by applicant before commencement of test) after 1500 hrs. & 3000 hrs. of operation then applicant shall justify the reason for deviation and accordingly take the corrective action & implement the Back-up plan. After implementation of Back-up plan the test shall be started again.

Common test procedure for SCR pilot test

Doc no. 0000-999-01 Rev- 00

8|P a g e

However, in case of change in Catalyst, counting of operating hours shall be restarted from Zero.

(x)Further, various components such as ammonia injection grid/nozzle, static mixer, catalyst de-dusting devices, supporting structure etc. shall also be observed with respect to erosion and pilot APH shall be observed for ABS formation.

(xi)Test shall be considered successful only if the conditions specified below at Cl No. 14.0 are achieved after 4400hrs. of continuous operation.

(xii)At the end of Main test period of Six (06) months, applicant shall furnish a report on the slip stream pilot test to the owner.

b)Optimisation (Preferable) & Extended Test

¾Optimisation Test (Preferable)

Following Optimization test shall preferably be done by the applicant after successful completion of the Main test in order to optimise the SCR system. Further, applicant can also do any other optimization test as desired by them:

i.Flue Gas velocity in Reactor: Flue gas velocity inside the reactor shall be increased by increasing the flue gas flow rate and its impact on catalyst performance & erosion shall be studied.

ii.Flue gas temperature: Flue gas temperature shall be varied by cooling the flue gas by means of a cooler installed in the bypass of supply duct/pipe to study its impact on catalyst performance and ABS formation in catalyst. However, cooler shall not be in service during the main test.

iii.Inlet NOx concentration: Inlet NOx concentration to the pilot plant reactor shall be varied to study its impact on catalyst performance. NOx variation can be done by varying distribution of combustion air in the steam generator, if required.

iv.Ammonia/ NOx molar ratio and ammonia slip: Molar ratio and ammonia slip shall be varied by varying the ammonia injection rate to study its impact on ABS formation.

v.Catalyst pluggage: Catalyst plug-in and its impact on catalyst performance &flue gas pressure drop across the reactor shall be studied by reducing the de-dusting frequency.

Note: The above tests are optional, hence, methodology & schedule of each optimization test needs to be furnished by Applicant.

Common test procedure for SCR pilot test

Doc no. 0000-999-01 Rev- 00

9|P a g e

¾Extended Test

After completion of Main & Optimization test (preferable), applicant shall conduct Extended test by keeping the pilot plant in service without ammonia injection for a period, so that combined period for Optimisation (preferable) & Extended Test shall be 4400 hrs for better & long term assessment of catalyst properties.

At the end of Optimisation (Preferable) & Extended Test period of 4400 hrs, applicant shall furnish a report on the slip stream pilot test to the owner.

7.0 METHODOLOGY FOR CATALYST SAMPLING

At the end of 1500hrs, only visual inspection of the SCR system shall be carried out and at the end of 3000hrs, 4400hrs & 8800 hrs. of operation, catalyst sample shall be taken to the mutually agreed laboratory by the applicant atleast for the following tests:

i.Catalytic activity (K and K/Ko) according to VGB R-  (35,  $SSOLF QW¶V

Standard

ii.SO2 to SO3 conversion rate according to VGB R-  (35,  $SSOLF QW¶V standard

iii.Surface area of catalyst and catalyst carriers according to ASTM D3663 or determination of the ratio of catalyst specific surface area with respect to initial value

iv.Test analysis of absorbed chemicals influencing the catalyst performance.

v.Loss of catalyst material due to erosion

a)For plate and corrugated type catalyst, loss of material due to erosion shall be assessed by using image processing of photos of the catalyst element and percentage of surface area without the catalyst shall be considered as percentage loss of material.

b)For honeycomb type of catalyst element, sample shall be washed with suitable chemical to remove absorbed flue gas constituents and then dried by heating. Difference in mass of the catalyst compared to new catalyst, is the loss of mass. Further, maximum reduction in catalyst height at a point on its inlet surface shall also be measured.

For plate type catalyst, one/ two plate(s)or one sub-element (minimum 112.5mm X 450mm) from topmost catalyst layer shall be taken out as sample and these plates

/sub-element shall be replaced with new identical catalyst plate / sub-element. Further, the new catalyst plate / sub-element installed shall be properly marked so that same can be easy identified.

Common test procedure for SCR pilot test

Doc no. 0000-999-01 Rev- 00

10|P a g e

For the honeycomb and corrugated type catalyst, one sub-element (minimum 150mm X 150mm) shall be taken out as sample and it shall be replaced with new identical sub-element.

Additional sampling catalyst are required to be kept in the reactor in case sampling frequency is more than specified.

Sample of catalyst if required may also be taken from other catalyst layers.

Note: Every time during sampling, only the initially installed plate or sub-element has to be taken out with the mutual consent of the owner & the applicant.

8.0TEST CONDITIONS

The tests for catalyst activity are to be performed at conditions as close to actual in terms of

i.Flue gas flow/ velocity through the reactor

ii.Flue gas temperature

iii.Flue gas composition

iv.Dust burden

Overall summary of the activity test conditions are mentioned in the following Table:

TABLE No.-1

	Parameter	Pilot Test Value		Remarks
	Flow	1500 Nm3/hr		Flue gas flow shall at least be equivalent to
		(Approximately)		velocity of 4 m/s through pilot plant reactor.
	Temperature	Same as tap off point		Maximum Flue gas	temperature	at
				economiser outlet will be around 380oC
	NOx	Same as tap off point		NOx concentration will be in the range of
				400-600 mg/Nm3 at 6% O2 on dry gas basis
	SO2	Same as tap off point		SO2 concentration will be in the range of
				800-2000 mg/Nm3 at 6% O2 on dry gas basis
	SO3	Same as tap off point		Inlet SO3 concentration will be
				approximately 1.5% of SO2.
	Inlet dust burden	Same as tap off point		Test output will be levelled for 70 g/Nm3 inlet
				dust burden. Applicant has to provide loss of
				catalyst data due to erosion for different inlet
				dust burden based on lab study for levelling.
	H2O	Same as tap off point		---
	CO2	Same as tap off point		---
	O2	Same as tap off point		---
	N2	Balance		---
Common test procedure for SCR pilot test			Doc no. 0000-999-01 Rev- 00		11|P a g e

Note:

For the pilot test, 0°C temperature and 1 atm pressure are to be used for calculating Normal or Standard conditions.

Pilot test will be performed for the actual test conditions with respect to the allotted unit. However, applicant has to correct the test results for 70 g/Nm3 inlet dust burden supported with correction curve/data.

Further, catalyst shall be designed to have minimum chemical and mechanical life of 16,000 hrs and 60,000 hrs respectively under actual operating conditions. Catalyst design shall ensure that SO2 to SO3 conversion limited to 1%. NOx reduction efficiency at the end of the life of the catalyst shall be more than 80% at 6% O2 on dry basis with maximum ammonia slip limited to 3ppm.

9.0 PROCESS MEASUREMENTS:

During the test, the online parameters shall be measured & recorded thrice a day as per

Annexure-VI:

	Description	Parameters to be measured			Position of Measurement
		Flow(Nm3/hr)			Inlet of SCR	-
		NO Concentration (mg/Nm³)			Inlet of SCR	Outlet of SCR
		SO2 Concentration (mg/Nm³)			Inlet of SCR	Outlet of SCR
		O2 Concentration (%)			Inlet of SCR	Outlet of SCR
						(If required)
	Flue Gas	Dust Concentration (g/Nm³)			Inlet of SCR	-
		Temperature (°C)			Inlet of SCR	Outlet of SCR and
						APH
		Pressure (mmwc)			Inlet of SCR and	Outlet of SCR and
					APH	APH
		SO3 (ppm)			Inlet of SCR	Outlet of SCR
		NH3 Slip (ppm)			-	Outlet of SCR
		Plugging			Reactor and pilot APH
		Erosion			Sample Catalyst
		Mechanical Strength except for			Sample Catalyst
		plate type catalyst
	Catalyst	Ratio of	Specific	Surface	Sample Catalyst
		Areawith respect to initial value
		Chemical analysisof absorbed
		chemicals	influencing the		Sample Catalyst
		catalyst performance.
		Porosity Analysis			Sample Catalyst
	Ammonia	Flow (kg/hr.)			Flue Gas supply duct to test reactor
	Consumption
	Any other
Common test procedure for SCR pilot test				Doc no. 0000-999-01 Rev- 00		12|P a g e

Applicant has to furnish the detail of the tentative consumables along with its approximate quantities and its power requirement at the time of signing of Test Protocol as per Annexure- II. Based on the requirement of the consumables and power, during the site visit terminal point for the consumables (i.e. steam, compressed air, water) and source of power will be identified with the mutual consent of the owner and applicant. Further, Applicant shall also furnish tentative requirements for facilities/ logistic support from owner for consideration before signing of test protocol, which shall be discussed during site visit & finalised.

13.0DATA TO BE SHARED WITH THE OWNER

During the test all data collected by Applicant & data received from lab test shall require to be shared with the Owner, such as;

i.SCR system components (i.e. ammonia injection grid/nozzles, static mixer, catalyst de-dusting devices, duct etc.) degradation due to ash erosion.

ii.Catalyst¶V physical, chemical and catalytic characteristics degradation with time.

iii.Plugging of pilot APH due to ABS formation

iv.De-dusting frequency.

v.System De-NOx efficiency.

vi.SO2 to SO3 conversion rate.

vii.Ammonia Slip.

viii.Flue gas pressure drop across pilot plant.

ix.Other data collected.

x.Effect of Acid dew point temperature

xi.Catalyst volume and area

xii.Coverage area per injection nozzle / flow per nozzle

xiii.Degree of super heat for soot blower steam

14.0CRITERIA FOR SUCCESSFUL DECLRATION OF TEST

After completion of main test ,Slip stream SCR pilot test shall be considered successful only for the type of SCR system being tested (including catalyst type, geometry, mechanical & chemical composition etc.) which shall meet the following criteria at the end of the test period of 4400 hrs:

	Description			Criteria
	Catalytic Activity Ratio (k/k0)			•
	DeNOx efficiency (%)			• 
	NH3 slip (ppmvd,6%O2 on dry basis)			”
	SO2 to SO3 conversion rate (%)			”
Common test procedure for SCR pilot test		Doc no. 0000-999-01 Rev- 00		15|P a g e

	Catalyst Plugging (%)	< 10.0
	Loss of catalyst material (%)	<5.0
	Reduction in catalyst height for honeycomb type catalyst (%)	< 5.0
	Total increase in Pressure drop across catalyst wrt initial	”
	value (new catalyst) (%)

PERFORMANCE CURVES: Applicant shall furnish performance curves required to evaluate the test results of SCR system as per the list enclosed at Annexure-V.

15.0 SAFETY REQUIREMENTS

Applicant shall ensure safety for personnel as well as equipment & its operation. To meet the safety requirements applicant shall provide all necessary arrangement, equipment & systems.

16.0 REPORTS

$SSOLF QW VK OO SUHS UH QG IXUQLVK WKH IROORZLQJ UHSRUWV IRU 2ZQHU¶V SSURY O 5HIHU

Annexure-IX for detail information to be included in the report):

A)Report after completion of Main Test

B)Report after completion of Optimization (preferable) & Extended Test

i)Optimization (preferable) Test

Applicant shall prepare a report upon completion of the Optimization (preferable) indicating detail of test, objective and procedure followed and collected data, result/ outcome of optimization test.

ii)Extended Test

Applicant shall furnish report indicating its outcome mainly wrt catalyst deactivation and impact of high ash on various SCR components after completion of extended test.

17.0ISSUANCE OF CERTIFICATE

After successful completion of the SCR slip stream pilot test and approval of the test reports, owner shall issue a certificate to the applicant comprising the various aspects of the pilot test and its outcome. The certificate shall include:

i.Brief description of pilot plant

ii.Test conditions

iii.Test duration

iv.System parameters and their achieved values.

Applicant can use this certificate as an evidence for the conductance of the SCR System in

VOLSVWUH PSLORWWHVW WRQHRIWKHRZQHU¶VSRZHUSO QW

Common test procedure for SCR pilot test

Doc no. 0000-999-01 Rev- 00

16|P a g e

18.0 ENCLOSURES
1. List of Annexure
Annexure	Description					Information to filled by	Schedule
						(Applicant/ Owner)
Annexure-I	Tentative		Schematic		and	Applicant	During	Test
	layout drawing of SCR pilot						Protocol signing
	test
Annexure-II	Detail	of	the	tentative		Applicant	During	Test
	consumables/			utilities/			Protocol signing
	Facilities/		Logistic	support
	required from the Owner
Annexure-III	Intermediate criteria for the					Applicant	Before
	continuation of the pilot test						commencement		of
	at the end of 1500hrs and						test
	3000hrs
Annexure-IV	Methodology for			meeting		--	--
	the Objectives of the test
Annexure-V	List of Performance Curves					Applicant	Before
							commencement		of
							test
Annexure-VI	Joint	Measurements to be				Applicant	During Test
	taken during test
Annexure-VII	Technical		Information		and	Applicant	Before	supply	to
	Data to be submitted by						site
	Applicant
Annexure-VIII	Typical Curve					--	--
Annexure-IX	Points to be covered in the					Applicant	After main test
	Test Reports.						After Optimization test

After Extended test

2.Schematic diagram of the SCR slipstream pilot set up is enclosed as Drg. No. 0000-999- POM-A-01

Common test procedure for SCR pilot test

Doc no. 0000-999-01 Rev- 00

17|P a g e

Annexure - I

Tentative Schematic and layout drawing of SCR pilot test

(Applicant to enclose Tentative schematic and layout drawing of SCR pilot plant enclose during protocol signing. )

Note:- These drawings are tentative and shall be revised and finalised after site visit based on the site conditions.

Annexure-II

Detail of the tentative consumables/ utilities/ Facilities/ Logistic support required from

the Owner

A)Tentative consumables/utilities along with their quantity (To be filled by applicant during signing of protocol)

Sl. No.	Description		Quantity	Parameter
1	Anhydrous ammonia for entire test period in kg
2	Compressed Air (at ___ barg)
	i)	Service Air
	ii)	Instrument Air
3	Steam (at ___ barg and ___ oC)
4	Water (Specify quality)
	i)	Service water
	ii)	DM water
	iii)	Potable water

5Electric power Supply

6 Space for office

7 Space for storage of equipment

Note :

1.Applicant shall include list of additional items (consumables/ utilities) required in the same Annexure.

2.Applicant will be required to submit the final consumables/ utilities requirements atleast 2 month before the start of test.

3.The consumables/ utilities shall be finalised after site visit and discussion with site personnel.

4.The final consumables/ utilities requirement shall be provided to applicant subjected to availability of the same at site.

5.Further, in view of above, applicant are required to make their SCR pilot system considering the availability of consumables/ utilities at site.

B)Tentative Facilities/ Logistics and terminal point may be provided by NTPC (Applicant to furnish tentative requirement & facility)

1.Space requirement:

a)For Office.

b)For storage of equipment.

c)For installation of equipment/ instrument at location of test.

d)For fabrication/ assembly of equipment/ system.

2.Guest House facility.

3.Access to:

a)Site location (Gate Pass to personnel etc.)

b)Control room alongwith space for installation of applicants system (such as Computer, printer etc.)

c)Data/ parameters of the DCS related to the testing (such as flue gas temperature, load, CEMS data etc.)

d)Handling equipment such as crane, forklift, hoist etc. for handling of

OLF QW¶V XL P QW

e)Site Workshop & Laboratory alongwith use of the facility.

4.Control signal exchange.

5.Design documents/ drawings of the boiler.

6.Documents/ certificate required from NTPC for import of equipment.

7.Construction water & Portable water.

8.Coal & Ash analysis.

Note:- The above facilities are tentative and subjective to availability at site. These shall be finalised after site visit and discussion with site personnel.

Annexure-III

Intermediate criteria for the continuation of the pilot test at the end of 1500hrs and 3000hrs

(Applicant has to furnish the following intermediate acceptance criteria prior to the start of the pilot test)

								Parameter for continuation of test
	Description						Unit			Tolerance
								After 1500hrs*	After 3000hrs**
Catalyst Activity (K/Ko)								NA
Change in Chemical composition								NA
of catalyst
Inner surface of the catalyst							(m2/g)	NA
Loss of catalyst material							%
Catalyst Plugging							%
De-NOx efficiency							%
SO2 to SO3 conversion rate							%	NA
NH3 slip less than one (01)							(ppmvd,6%O2
ppmvd (Yes / No)							on dry basis)
Flue gas	pressure			drop across			mmwc
reactor
Ammonia	injection			grid/nozzle
erosion	pattern (Reduction					of	%
average thickness)
Catalyst	de-dusting				system
cleaning	efficiency		(reduction			in	mmwc
flue gas pressure drop)
Catalyst	de-dusting				system		No./day
operating frequency
Catalyst	de-dusting				system
erosion pattern							%
(Reduction of average thickness)
Percentage		erosion		of	various
components		of	SCR		system
(such	as	structure,			flow
straightner etc.)
* Visual Inspection Only

**Sampling shall also be done along with visual inspection NA- Not Applicable

Note:

1.The value of parameter for continuation of the test indicated above shall not exceed the value specified for successful completion of Main test.

2.Applicant may give details of additional parameters (other than indicated above) which are required to monitor SCR System performance at intermediate stage in the above format.

											Annexure-IV
			Methodology for meeting the Objectives of the test
Sl.	Objective			Detail			Measurement parameter			Measurement	Reference of
No.										frequency	calculation/ formula/ curve
1.	Performance evaluation of
1.1	NOx reduction efficiency limiting maximum		a) During main test				i) NOx at inlet & outlet of			continuous	Calculation as per cl. 10.0 a), b) & c)
	ammonia slip							SCR
							ii)	NH3 slip at SCR outlet
1.2	Pressure drop across the reactor		a) During Main test				i) DP across the SCR reactor			Continuous	Calculation as per cl. 10.0 d) and also
			b) Study of rate of rise of								a graph shall be plotted between
			DP	with	time	shall					Time vs DP across reactor to see the
			also be done								max. rate of rise in pressure drop
											until de-dusting system taken into
											service.
1.3	viii)	To assess the impact of SCR	a) During Main test				i)	DP across the pilot APH ii)		i)Continuous	Calculation as per cl. 10.0 e) and also
	system on APH performance due to		b) Study of rate of rise of					Visual inspection	for		a graph shall be plotted between
	Ammonium bisulphate (ABS) formation		DP	with	time	shall		deposition of ABS		ii) Intermittent	Time vs DP across pilot APH to assess
			also be done				iii)	Determination of	ABS		the ABS formation.
								composition		iii) intermittent
2.	To assess mechanical life of
2.1	Catalyst		During sampling and Lab				i) Erosion will be		seen	Intermittent	Predicted life curve shall be made by
								visually at site and in lab			applicant based on inspection and
								by loss of material			lab result. Further, erosion shall be
							ii) IDB				corrected based on 70g/Nm³ IDB and
							iii) Flue gas velocity				4 m/sec flue gas velocity. If required
											correction curve shall be used which
											shall be provided by Applicant.
2.2	SCR Components (Reactor internals, mixing		During sampling and end of				Visual inspection for erosion			Intermittent	Predicted life curve shall be made
											Page | 1

											Annexure-IV
		Methodology for meeting the Objectives of the test
Sl.	Objective	Detail	Measurement parameter					Measurement			Reference of
No.								frequency			calculation/ formula/ curve
	device, injection pipe, Nozzle etc.)	test									based on inspection for all the
											components.
											Further, Applicant shall recommend
											any design change or material
											change based on the results.
3.	To assess chemical life of Catalyst and	Before start of test, during	Test at lab: Activity, BET					Intermittent			Catalyst deactivation curve shall be
	catalyst management plan	sampling and end of test.	tests,	chemical	composition						made by applicant based on lab
			or	absorbed		chemicals					result at various interval and curve
			influencing the			catalyst					shall be used to determine the life of
			performance								catalyst by extrapolation. Further,
											catalyst management plan shall also
			NH3 slip & De-NOx efficiency.					continuous			be prepared & furnished by
											applicant based on the above.
4.	Performance evaluation of catalyst
4.1	Erosion	As per Sl. No. 2.1 above
4.2	Plugging	a)During main test	Visual	inspection		&	DP	a) Intermittent			For assessment of plugging DP v/s
		b)During optimization test	across the SCR					b) Duration		will	plugging curve shall be used.
								be noted		for	Applicant shall furnish this curve. A
								5%,	10%	and	typical curve is attached at
								15%	plugging		Annexure-VIII.
								of catalyst
4.3	Deactivation	As per Sl. No. 3 above
4.4	SO2 to SO3 conversion	During main test and LAB	i)SO2 inlet & outlet of SCR					Intermittent		and	As per 10.0 (f)
		test	ii)SO3	by		control		sampling
			condensation		method		at

Page | 2

							Annexure-IV
		Methodology for meeting the Objectives of the test
Sl.	Objective	Detail	Measurement parameter		Measurement		Reference of
No.					frequency	calculation/ formula/ curve
			reactor outlet
5.	To assess the design parameters including	As per Sl. No. 2.2 above
	component material for SCR system
6.	To assess the design parameter of catalyst-					Based on the test result catalyst
	Type, pitching, face velocity, composition,					design shall be assessed for
	Physical properties, volume, space velocity					suitability for high ash Indian coal.
	for Indian coal composition
7.	Various catalysts deactivation mechanisms	In the lab				Based on the lab result of catalyst
	(i.e. masking, plugging, poisoning, sintering,					sample, this will be assessed &
	erosion, etc.), catalyst deactivation rate					analyzed.
	assessment and identification of operating
	variables impacting the same for Indian
	coal(s).
8.	To observe de-dusting system effectiveness	a) During main test	i) DP across the SCR before		i) Continuous	i) Effectiveness of de-dusting system
	and operating frequency.			and after de-dusting		shall be observed based on DP
				system taken in service		before	& after operation of
						de-dusting system compared wrt DP
						across	newly installed catalyst.
						Applicant shall give criteria for the
			ii)	Visual inspection	ii)During sampling	same.
			iii)	Frequency of operation	iii) Continuous	ii) Joint inspection
						iii) By reading
9.	To assess various utility consumption	During main test	i) NH3 consumption		Intermittent	Calculated based on test result
	including reagent		ii) Other utility consumption
			such	as Air, steam, power

Page | 3

Annexure-IV

Methodology for meeting the Objectives of the test

Sl.

Objective

Detail

Measurement parameter

Measurement

Reference of

No.

frequency

calculation/ formula/ curve

etc.

10.

Design criteria

for

mixing devices

and

To evaluate

ammonia

% of NOx reduction,

Continuous

Performance of NOx reduction

ammonia injection grid

injection effectiveness

Amount

of

Ammonia

efficiency, NH3 slip & erosion

injection &

Ammonia

pattern during the test.

Slip

11.

Impact of flue gas volume flow rate, flue

During Optimization test

Based on the test result.

gas temperature, fuel change, ash loading,

ammonia slip, SO2 to SO3 conversion on

catalyst design and its performance

12.

Impact of temperature range for reagent

During Optimization test

i) NH3 slip & De-NOx

Based on the test result.

injection and other parameters on

efficiency will be seen at

ammonia slip & SO2 to SO3 conversion

various inlet temperature

ii) i)SO2 inlet & outlet of SCR

ii)SO3

by

control

condensation

method at

reactor outlet

13.

Optimization of catalyst volume & flue gas

During optimization study

i) Relevant data to be taken.

Based on the test result applicant

velocity inside

the

reactor

and pressure

shall determine the catalyst volume

drop across reactor with respect to required

ii)DP at

different

velocity

& max. pressure drop. Further based

life.

shall be taken

on the same Applicant shall predict

these values for full scale SCR system

considering 16000 hrs & 24000 hrs.

chemical life of catalyst.

14.

Performance

of

SCR

system

after

Evaluate effect of pre dust

i. Pressure

drop

across

Intermittent/

Based on test result

installation of

pre-dust

collector

(if

collector

on

SCR

reactor

&

across dust

Continuous

Page | 4