CIESC Journal ›› 2023, Vol. 74 ›› Issue (9): 3888-3902.DOI: 10.11949/0438-1157.20230689

• Energy and environmental engineering • Previous Articles     Next Articles

System integration and energy conversion mechanism of the power technology with integrated supercritical water gasification of coal and SOFC

Zhewen CHEN(), Junjie WEI, Yuming ZHANG()   

  1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
  • Received:2023-07-05 Revised:2023-09-05 Online:2023-11-20 Published:2023-09-25
  • Contact: Yuming ZHANG


陈哲文(), 魏俊杰, 张玉明()   

  1. 中国石油大学(北京)重质油国家重点实验室,北京 102249
  • 通讯作者: 张玉明
  • 作者简介:陈哲文(1990—),男,博士,讲师,
  • 基金资助:


Based on the hydrogen-rich characteristic of the syngas produced through supercritical water gasification of coal, a power system with integrated supercritical water gasification of coal with solid oxide fuel cell (SOFC) and gas turbine is proposed. The high-temperature and high-pressure sensible enthalpy of the gasification products is recovered by an expander, and the chemical energy is successively utilized by the SOFC and gas turbine for power generation. The sensible heat of the exhaust flue gas at the outlet of the gas turbine and the air at the outlet of the SOFC cathode is mostly used for preheating the feed water of the boiler. Under the conditions of gasification temperature and pressure of 660℃/250 bar and coal-water-slurry concentration (CWSC) of 11.3% (mass) in the gasifier, the power generation efficiency of the system can reach 54.01%, and the exergy efficiency is 52.79%. Compared with the most advanced 1000 MW ultra-supercritical steam Rankine cycle coal-fired power station, the new system proposed in this article can achieve an annual CO2 emission reduction of 390000 t. The coal based power generation system proposed in this article further deepens the cascade utilization of coal chemical energy, and achieves efficient matching of the energy levels between various subunits, which will help to achieve the carbon peaking and carbon neutrality goal.

Key words: process systems, optimal design, supercritical water gasification of coal, integration, SOFC, computer simulation


基于超临界水煤气化合成气的富氢特征,提出了一种超临界水煤气化耦合固体氧化物燃料电池(SOFC)及燃气轮机发电系统,气化产物的高温高压显焓由膨胀机回收,化学能由SOFC及燃气轮机先后利用发电,燃气轮机排气及SOFC阴极空气的大部分显热用于预热锅炉给水。在气化温度660℃、气化压力250 bar (1 bar=0.1 MPa)及气化室内煤浆浓度为11.3%(质量)条件下,系统发电效率可以达到54.01%,㶲效率为52.79%。相比于先进的1000 MW超超临界蒸汽朗肯循环燃煤电站,所提新系统可实现年减排CO239万吨。提出的煤基发电系统,进一步深化了煤炭化学能的梯级利用,实现了各子单元间的高效能级匹配,有助于实现双碳目标。

关键词: 过程系统, 优化设计, 超临界水煤气化, 集成, 固体氧化物燃料电池, 计算机模拟

CLC Number: