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COAL IN COMBINED CYCLEA New Frontier for Power Generation

Power-Gen India & Central Asia 2012New Delhi

Somnath KunduApril 20, 2012

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Content

Power Generation in INDIA - Fuel wise Contribution

Power Generation in INDIA Need of the Hour

INDIA towards Clean Coal Technology

IGCC & Its Benefits

IGCC Global Experience

IGCC in INDIA

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Total installed capacity as on March 31, 2012 : 1,91,992 MW

XIIth Plan envisaged addition of 79,690 MW, out of this

83.6% is from coal

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Affordable, reliable & environmentally responsible power

Power Generation in INDIA Need of the Hour

Driving cost of electricitydown

Efficienc

y

Reliability

E

missions

EfficientLarge available resource

CoalCoal

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India towards Clean Coal Technology

Focus on Technologies for utilization of Coal with high

efficiency and minimal pollutants(Reduced CO2, SOx, NOx, SPM)

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Integrated Gasification Combined

Cycle & Its Benefits

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What is IGCC

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Gasification

process

Integrated Gasification Combined Cycle

Proven technology Proven technology

Combined

Cycle

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Air

Steam

N2 From ASUGasCooler

RawSyngas

Steam

Steam

Combustor

Generator

CleanSyngas

Syngas

Gas Cleanup

Steam

Sulfuric AcidPlant

Gas Turbine

Heat RecoverySteamGenerator

HotExhaustGas

Raw Syngas

OxygenO2

Steam

Coal

Feed Water

Air SeparationUnit (ASU) N2 to GT

Combustor

Compressed Air fromGT Compressor

Ash

Gasifier

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Condenser

BFP

Feed Water

ASU

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What is Gasification

Gasification is a process in which combustible materials

are partially oxidized or partially combusted.

Gasification processes operate in an oxygen-lean

environment

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Comparison of the primary productscreated by the main fuel constituents incombustion and gasification

Gasification Processes

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Typical Syngas composition

LHV of Natural Gas is around 38-45 MJ/Nm3

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Type & Make of Gasifiers

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Syngas Cleaning for Integrating With a

Combined Cycle

Clean-up Required for following :

Particulate Matter

Sulfur species & Chlorides to prevent rapid corrosion of

hot section parts and recover more heat from GT exhaust.

Nitrogen-containing species to prevent formation of fuel-

bound NOx in the GT combustor.

Mercury vapor & CO2 in the syngas

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Net Plant Efficiency (HHV Basis)(Source : DOE/NETL, USA 2007/1281)

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Efficiency,%

(HHVBasis)

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Water Demand(Source : DOE/NETL, USA 2007/1281)

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Water,gpm

/MW(net)

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CO2

Emission Normalized By Gross Output(Source : DOE/NETL, USA 2007/1281)

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CO2Emission,lb/MWh

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SOX

, NOX

and Particulate Emission Rates(Source : DOE/NETL, USA 2007/1281)

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Emission

,lb/MMBtu

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IGCC Global Experience

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Major plants in operation for >10 yrs

As of 2012, 30 plants are in operation around the world

Cumulative operating experience is well over one million hours

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Major projects under execution

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IGCC in INDIA

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Govt. Support needed:

Allocate at least 5% of planned addition of 12th Plan

through IGCC

Provide grant/aid, tax holiday for setting up IGCC Plant

Support higher tariff in PPA

Indian Company to bring technology through

collaboration, JV & other routes

Construct and operate IGCC plants for furtherdevelopment of technology

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