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Techno-economic Analysis of an Integrated Gasification Direct-Fired Supercritical CO2 Power Cycle

Journal Article · · Fuel
 [1];  [2]
  1. NETL
  2. KeyLogic Systems, LLC
+ Show Author Affiliations

This study describes systems analyses of an entrained flow coal gasification system integrated with an oxy-fired direct supercritical CO2 (sCO2) power cycle. Conceptual designs are included for a baseline sCO2 plant and a revised plant with improved gasifier/sCO2 cycle thermal integration. The results yield plant thermal efficiencies of 37.7% (HHV) and 40.6% for the baseline and improved sCO2 cases, including >97% carbon capture and storage (CCS). These efficiencies are a significant improvement on the 31.2% efficiency of the same gasifier in integrated gasification combined cycle (IGCC) plant configuration with CCS, and are also shown to be comparable to more advanced IGCC systems and other coal-fueled direct sCO2 plants with CCS. Detailed economic analyses yield cost of electricity (COE) results of $137.3/MWh and $122.7/MWh for the baseline and improved sCO2 plants, respectively, representing 10% and 20% improvements on the reference IGCC COE of $152.6/MWh, with CCS.

Research Organization:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Organization:
(FE-22) - FE-22
DOE Contract Number:
FE0025912
OSTI ID:
1491114
Report Number(s):
NETL-PUB-21184
Journal Information:
Fuel, Journal Name: Fuel Journal Issue: N/A Vol. 212; ISSN 1080-5540
Country of Publication:
United States
Language:
English

References (6)

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conference June 2016
Comparison of Supercritical Carbon Dioxide Cycles for Oxy-Combustion conference June 2015
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Evaluation of Property Methods for Modeling Direct-Supercritical CO2 Power Cycles conference June 2017
The Oxy-Fuel, Supercritical CO2 Allam Cycle: New Cycle Developments to Produce Even Lower-Cost Electricity From Fossil Fuels Without Atmospheric Emissions
  • Allam, R. J.; Fetvedt, J. E.; Forrest, B. A.
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conference September 2014

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