Process Evaluation of Carbon Dioxide Capture for Coal-Fired Power Plants

Satoshi Kodama, Kazuya Goto and Hidetoshi Sekiguchi

Energy and Environment Research, 2014, vol. 4, issue 2, 105

Abstract: Carbon capture is a promising technology for carbon dioxide (CO2) removal from large stationary CO2 sources. The effects of carbon dioxide capture process on output efficiency of fossil power plants were investigated. Supercritical pulverized coal and integrated coal gasification combined cycle (IGCC) were assumed as model coal-fired power plants for this investigation. Heat-driven and pressure-driven CO2 capture processes such as chemical absorption and physical adsorption were assumed for CO2 capture process. In this study, these technologies were evaluated and compared under the unified basis and conditions by using the commercial process simulator. For IGCC plant, the efficiency penalty by installing water-gas shift reaction was also investigated. Gross and net power generation, efficiency and the efficiency penalty by CO2 capture process were calculated. Heat duty for CO2 capture process and CO2 compression conditions were varied, and those effects on the efficiency penalty were obtained. The results provide a guideline for development of CO2 capture process of power plants.

Date: 2014
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