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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

slide4

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
  • 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:

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
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