回收CO_2的整体煤气化熔融碳酸盐燃料电池联合循环系统研究

Study on the Integrated Coal Gasification Molten Carbonate Fuel Cell Combined Cycle System with CO_2 Capture

本文以整体煤气化联合循环(IGCC)为基准系统,构建了整体煤气化熔融碳酸盐燃料电池联合循环(IGMCFCCC)发电系统,并提出了回收CO_2的IGMCFCCC系统。利用Aspen Plus软件对系统进行了模拟研究,结果表明:回收CO_2的IGMCFCCC系统效率(48.38%)比传统不回收CO_2的IGCC系统(44.15%)效率提高了4.23个百分点,同时捕获了系统中80.16%的CO_2,但比不回收CO_2的IGMCFCCC系统效率(51.40%)降低了3.02个百分点。此外,本文还研究了CO_2利用率,燃料利用率对系统性能的影响,研究成果将对未来回收CO_2的发电系统提供有益的参考。

On the base of an integrated gasification combined cycle （IGCC） system, an integrated coal gasification molten carbonate fuel cell combined cycle system （IGMCFCCC） is established in this paper, and a new IGMCFCCC system with C02 capture is proposed. Aspen Plus software is used to develop the system models and the performances of different systems are compared. The results show that after capturing 80.16% of CO2 the efficiency of IGMCFCCC system with CO2 capture （48.38%） is still 4.23 percentage points higher than that of the traditional IGCC system without CO2 capture （44.15%）, but 3.02 percentage points lower than that of the IGMCFCCC system without CO2 captm＇e （51.40%）. In addition, the effects of both CO2 utilization rate and fuel utilization rate on system performance are investigated. The research achievements from this paper will provide the useful reference for the further study on MCFC hybrid system with CO2 capture.