整合化学链空分制氧及CCS技术的煤气化制氢工艺模拟研究

Hydrogen production by coal gasification system integrated with chemical looping air separation and carbon capture and storage(CCS) technologies

整合化学链空分制氧及钙基循环CO2捕集技术,提出了一种新的煤气化制氢工艺。根据Gibbs自由能最小化原理,利用Aspen Plus对所建工艺进行了模拟。模拟结果显示,在文中所给操作、进料条件下,该工艺所得粗煤气的冷煤气效率为80.35%,产品气中H2体积分数大于99.97%。同时对工艺中气化反应温度、水气转换反应温度和Ca O进料量等主要影响因素进行了分析讨论,得出氢效率和碳捕集率随Ca O进料量增大均呈先增加后减小的趋势。

Hydrogen production by coal gasification system integrated with chemcial looping air separation and carbon capture and storage （CCS） technologies, has been proposed as a novel hydrogen generation technology in this study. Based on the Gibbs free energy minimization principle, Aspen Plus has been employed to simulate this system. The simulation results show that the cold gas efficiency of the raw syngas is 80. 35% ,and H2 in the product gas is more than 99. 97% according to the operation and feed flow conditions given by this article. The three main factors, such as gasification temperature,water-gas shift reaction temperature and the feed flow of CaO have been analyzed. It indicates that both mole fraction of H2 and carbon capture rate are firstly increased and then decreased with the increase in feed flow of CaO.