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- W2799623466 abstract "Using CO2 as gasification agent instead of steam in in-situ coal gasification chemical looping combustion (iG-CLC) power plant can eliminate energy consumption for steam generation, thus obtaining higher system efficiency. In this work, a comparative study of iG-CLC power plant using steam and CO2 as gasification agent is concentrated on. The effects of steam to carbon ratio (S/C) and CO2 to carbon ratio (CO2/C) on the fuel reactor temperature, char conversion, syngas composition and CO2 capture efficiency are separately investigated. An equilibrium carbon conversion of 88.9% is achieved in steam-based case as S/C ratio increases from 0.7 to 1.1, whereas a maximum conversion of 84.2% is obtained in CO2-based case with CO2/C ranging from 0.7 to 1.1. Furthermore the effects of oxygen carrier to fuel ratio (φ) on system performances are investigated. Increasing φ from 1.0 to 1.4 helps to achieve char conversion from 75.9% to 88.9% in steam-based case, by contrast the char conversion can achieve 66.3%–84.2% in CO2-based case within the same φ range. In terms of iG-CLC power plant, recycling partial CO2 to the fuel reactor improves the overall performance. Approximately 3.9% of net power efficiency are increased in CO2-based plant, from steam-based plant. Higher CO2 capture efficiency and lower CO2 emission rate are observed in CO2-gasified iG-CLC power plant, expecting to be 90.63% and 85.18 kg·MW− 1·h− 1, respectively." @default.
- W2799623466 created "2018-05-17" @default.
- W2799623466 creator A5016365617 @default.
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- W2799623466 date "2018-11-01" @default.
- W2799623466 modified "2023-09-29" @default.
- W2799623466 title "High-efficiency and pollution-controlling in-situ gasification chemical looping combustion system by using CO2 instead of steam as gasification agent" @default.
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- W2799623466 doi "https://doi.org/10.1016/j.cjche.2018.03.016" @default.
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