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

Zhewen Chen; Xiaosong Zhang; Wei Han; Lin Gao; Sheng Li

doi:10.1016/j.energy.2017.10.077

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

Zhewen Chen, Xiaosong Zhang^*, Wei Han, Lin Gao, Sheng Li

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

49 Citations (Scopus)

Abstract

Supercritical water gasification (SCWG) is a promising clean coal technology. A new power generation system with integrated supercritical water gasification of coal andCO₂ capture is proposed in this article. The gasification product consisted of H₂, CO, CO₂, CH₄, and unreacted supercritical water is directly combusted with pure O₂to 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.

Original language	English
Pages (from-to)	723-730
Number of pages	8
Journal	Energy
Volume	142
DOIs	https://doi.org/10.1016/j.energy.2017.10.077
Publication status	Published - 1 Jan 2018
Externally published	Yes

Keywords

CO capture
Exergy analysis
Power generation
Supercritical water gasification

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10.1016/j.energy.2017.10.077

Cite this

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title = "A power generation system with integrated supercritical water gasification of coal and CO2 capture",

abstract = "Supercritical water gasification (SCWG) is a promising clean coal technology. A new power generation system with integrated supercritical water gasification of coal andCO2 capture is proposed in this article. The gasification product consisted of H2, CO, CO2, CH4, and unreacted supercritical water is directly combusted with pure O2to 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.",

keywords = "CO capture, Exergy analysis, Power generation, Supercritical water gasification",

author = "Zhewen Chen and Xiaosong Zhang and Wei Han and Lin Gao and Sheng Li",

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doi = "10.1016/j.energy.2017.10.077",

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AU - Chen, Zhewen

AU - Zhang, Xiaosong

AU - Han, Wei

AU - Gao, Lin

AU - Li, Sheng

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Supercritical water gasification (SCWG) is a promising clean coal technology. A new power generation system with integrated supercritical water gasification of coal andCO2 capture is proposed in this article. The gasification product consisted of H2, CO, CO2, CH4, and unreacted supercritical water is directly combusted with pure O2to 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.

AB - Supercritical water gasification (SCWG) is a promising clean coal technology. A new power generation system with integrated supercritical water gasification of coal andCO2 capture is proposed in this article. The gasification product consisted of H2, CO, CO2, CH4, and unreacted supercritical water is directly combusted with pure O2to 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.

KW - CO capture

KW - Exergy analysis

KW - Power generation

KW - Supercritical water gasification

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

Abstract

Keywords

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