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Energy Systems Analysis Group Activities. Bob Williams CMI Annual Meeting Princeton University 9 February 2010. Toward Decarbonization of Coal Power. US coal power accounts for: ½ of electricity ⅓ of CO 2 emissions from fossil fuel burning

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Energy systems analysis group activities

Energy Systems Analysis Group Activities

Bob Williams

CMI Annual Meeting

Princeton University

9 February 2010


Toward decarbonization of coal power
Toward Decarbonization of Coal Power

US coal power accounts for:

½ of electricity

⅓ of CO2 emissions from fossil fuel burning

Decarbonizing existing coal plant sites warrants priority under serious C-mitigation policy

Options considered:

CCS retrofit for pulverized coal plant (PC-CCS retrofit)

Four repowering options

Definitions:

Retrofit: retain plant but add equipment to “scrub” CO2 from flue gases

Repower: bulldoze site and rebuild there—but retain all infrastructure…or rebuild elsewhere if site unsuitable



Energy systems analysis group activities

Repowering via Coal/Biomass Coproduction

of Liquid Fuels + Electricity with CCS (CBTLE-CCS)

  • Outputs: Fischer-Tropsch liquid fuels (~ 2/3 energy out = synthetic

  • diesel/gasoline) + electricity (~ 1/3 energy out from combined cycle)

  • ~ ½ feedstock C captured as CO2, stored in geological media

  • GHG emission rate declines as biomass % of energy input increases

  • Configuration considered:

    • 7,800 B/D of FTL + 264 MWe (net)

    • Biomass @ 1 x 106 dt/y = 38% of input (energy basis, HHV)

    • 2.1 x 106 t CO2 stored annually

    • GHG emissions are ~ 90% < for conventional energy displaced

    • (existing coal power + equivalent crude oil-derived products)



Thought experiment decarbonize 90 of existing coal power 2020 2050 9 4 gw e y
THOUGHT EXPERIMENT: DECARBONIZE 90% OF EXISTING COAL POWER, 2020-2050 (9.4 GWe/y)

  • CBTLE-CCS coproduct: 3.9 million barrels/day of low-C synfuels

  • 0.5 Gt biomass needed annually by 2050 for repowering option

  • NG generation up 2 X, 2020-2050 (assumed make-up power:NGCC-CCS)


Future work
FUTURE WORK 2020-2050 (9.4 GW

  • Potentially abundant, ubiquitous shale gas at reasonable cost  extend coproduction idea CBTLE-CCS  GBTLE-CCS

  • Extend analysis to China—exploring prospects for both as alternatives to continued building of PC-V plants


Esag team and main collaborators 2009 2010

Core Group: 2020-2050 (9.4 GW

Robert Williams

Eric Larson

Tom Kreutz

LIU Guangjian

ZHENG Zhong

China Collaborators

LI Zheng (Tsinghua)

CHEN Haiping (NCEPU)

GUO Xianbo (SINOPEC)

ZHOU Zhe (Tsinghua)

Politecnico di Milano collaborators:

Stefano Consonni

Emanuele Martelli

Giulia Fiorese

ECN, The Netherlands

Michiel Carbo

ESAG TEAM AND MAIN COLLABORATORS, 2009-2010