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

Conference · Wed May 10 04:00:00 EDT 2017

OSTI ID:1491106

Weiland, Nathan ^[1]; White, Chuck ^[2]

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1. NETL
2. KeyLogic Systems, LLC

This presentation describes recent systems studies of a coal-fueled, oxy-fired direct supercritical CO2 (sCO2) power cycle, which inherently captures carbon for storage (CCS). In this plant, coal is gasified in an entrained flow gasifier, the syngas is cleaned and burned with oxygen and diluent sCO2 in the cycle’s oxy-combustor. This is followed by turbine expansion and recuperation of thermal energy in the exhaust. After water is condensed from the working fluid, some of the CO2 is exhausted for CCS, and the balance is compressed and heated in the recuperator for return to the combustor. The conceptual design and system model for the plant are discussed, including thermal integration between the sCO2 cycle and the gasifier, and optimization of the overall plant configuration and operating conditions. The capital cost, operating expenses, and cost of electricity (COE) are also estimated. Results show improved efficiency and COE relative to IGCC plants 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: 1491106
• Report Number(s): NETL-PUB-20933
• Country of Publication: United States
• Language: English