文献类型：期刊文献

英文题名：Ni/CaO-Al2O3 Bifunctional Catalysts for Sorption-Enhanced Steam Methane Reforming

作者：Xu, Pan[1];Zhou, Zhiming[1];Zhao, Changjun[1];Cheng, Zhenmin[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2014

卷号：60

期号：10

起止页码：3547

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20143618141611);WOS:【SCI-EXPANDED(收录号:WOS:000341767700013)】；

基金：The work was supported by the National Natural Science Foundation of China (21276076), the Program for New Century Excellent Talents in University (NCET-13-0801), the Fundamental Research Funds for the Central Universities (222201313011), and the "111" project (B08021).

语种：英文

外文关键词：sorption-enhanced steam methane reforming; bifunctional catalyst; hydrogen; structure-property relationship; stability

摘要：Ni/CaO-Al2O3 bifunctional catalysts with different CaO/Al2O3 mass ratios were prepared by a sol-gel method and applied to the sorption-enhanced steam methane reforming (SESMR) process. The catalysts consisted mainly of Ni, CaO and Ca5Al6O14. The catalyst structure depended strongly on the CaO/Al2O3 mass ratio, which in turn affected the CO2 capture capacity and the catalytic performance. The catalyst with a CaO/Al2O3 mass ratio of 6 or 8 possessed the highest surface area, the smallest Ni particle size, and the most uniform distribution of Ni, CaO, and Ca5Al6O14. During 50 consecutive SESMR cycles at a steam/methane molar ratio of 2, the thermodynamic equilibrium was achieved using the catalyst with a CaO/Al2O3 mass ratio of 6, and H-2 concentration profiles for all the 50 cycles almost overlapped, indicating excellent activity and stability of the catalyst. Moreover, a high CO2 capture capacity of 0.44 gCO2/gcat was maintained after 50 carbonation-calcination cycles, being almost equal to its initial capacity (0.45 gCO2/gcat). (c) 2014 American Institute of Chemical Engineers AIChE J, 60: 3547-3556, 2014