A power generation system with integrated supercritical water gasification of coal and CO2 capture

被引：35
作者：
Chen, Zhewen [1 ,2 ]
Zhang, Xiaosong [1 ,2 ]
Han, Wei [1 ,2 ]
Gao, Lin [1 ,2 ]
Li, Sheng [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Engn Thermophys, Beijing, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100190, Peoples R China
来源：
ENERGY | 2018年 / 142卷
关键词：
CO2; capture; Supercritical water gasification; Power generation; Exergy analysis; HYDROGEN-PRODUCTION; EXERGY ANALYSIS; EXTRACTION; LIGNITE; TRANSFORMATION; PREDICTION; EQUILIBRIA; OXIDATION; PLANT;
D O I：
10.1016/j.energy.2017.10.077
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Supercritical water gasification (SCWG) is a promising clean coal technology. A new power generation system with integrated supercritical water gasification of coal and CO2 capture is proposed in this article. The gasification product consisted of H-2, CO, CO2, CH4, and unreacted supercritical water is directly combusted with pure O-2 to provide heat for other units of the system, and the combustion product is used for power generation in turbines. The combustion product consists only of CO2 and H2O. Thus, the CO2 can be easily captured under atmospheric condition. The thermal efficiency of the system can reach 38.31%, while the CO2 capture rate is 100%. The energy and exergic balances are conducted. The exergy efficiency of the system is 38.56%. The system has advantages over most coal-fired power plants with oxy-combustion or post-combustion technologies and IGCC systems with pre-combustion technologies. (C) 2017 Elsevier Ltd. All rights reserved.
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收藏
页码：723 / 730
页数：8
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