化学链重整联合CO_2捕集制氢系统热力学分析  

THERMODYNAMICS ANALYSIS OF HYDROGEN PRODUCTION SYSTEM BY CHEMICAL-LOOPING REFORMING COUPLED WITH CO_2 CAPTURE

作　　者：诸林[1] 蒋鹏[1] 范峻铭[1] 

机构地区：[1]西南石油大学化学化工学院,成都610500

出　　处：《太阳能学报》2015年第8期1978-1984,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(U1262111);西南石油大学研究生创新基金(CXJJ2015011)

摘　　要：化学链重整是一种新型的合成气制备技术，为提高化学链重整气中H2含量，捕集CO2，提出化学链重整联合CO2捕集制氢系统。采用Aspen Plus对化学链重整过程进行模拟，结果表明：化学链重整气组成模拟值较好地吻合实验值。对所提出的系统进行热力学分析，以H2产率和CO2捕捉率为系统性能评定指标，得到反应优化条件：吸收反应温度为600．620℃，CaO／CH4、蒸汽／CH4、H2O／CH4、NiO／CH4物质的量之比分别为：0．8、0．25、0．3、1．4，所得产品气中H2含量为91．13％（高于化学链重整气中H2含量64．12％），H2产率为1．96，CO2捕集率达到95．44％。Chemical looping reforming is a new way to produce syngas. In order to improve the concentration of hydrogen in chemical looping reformer gas and capture carbon dioxide, the hydrogen production system by chemical looping reforming coupled with CO2 capture was proposed as a novel technique. Aspen Plus software was used to simulate chemical looping reforming process. The results show that the simulated value is in good agreement with the experimental data for the chemical looping reforming gas composition. Thermodynamic analysis was conducted to the proposed system. Hydrogen yield and COs capture efficiency were used to evaluate the system performance. The optimal operation conditions were obtained as following： the absorption reaction temperature was 600-620 ℃, the CaO/CH4 mole ratio, steam/CH4 mole ratio, H2O/CH4 mole ratio and NiO/CH4 mole ratio were 0.8, 0.25, 0.3 and 1.4, respectively; The H2 concentration in obtained gas product was 91.13% （higher than the H= content of 64.12% in the previous chemical looping reforming experimental data） , and the H2 yield was 1.96, CO2 capture efficiency was 95.44% in this novel system.

关 键 词：化学链重整 CO2捕集 直接制氢 ASPEN Plus 热力学分析 

分 类 号：TQ546[化学工程—煤化学工程]