文献类型：会议论文

英文题名：Catalytic performance of Ni/CaO-Ca5Al6O14 bifunctional catalyst extrudate in 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

会议论文集：1st International Symposium on Catalytic Science and Technology in Sustainable Energy and Environment (EECAT)

会议日期：OCT 08-10, 2014

会议地点：Tianjin, PEOPLES R CHINA

语种：英文

外文关键词：Sorption-enhanced steam methane reforming; Bifunctional catalyst; Catalyst extrudate; Hydrogen; CO2 capture; Stability

摘要：In this work, mm-sized shaped Ni/CaO-Ca5Al6O14 bifunctional catalyst extrudates were prepared by extruding sol-gel-derived Ni/CaO-Ca5Al6O14 powder, and applied to the sorption-enhanced steam methane reforming (SESMR) process. The Ca5Al6O14-stabilized bifunctional catalysts exhibited higher stability and CaO utilization efficiency than that of Ni/CaO when subjected to 50 carbonation-calcination cycles for CO2 capture, indicating the positive effect of Ca5Al6O14 incorporation. The Ni/CaO-Ca5Al6O14 extrudates possessed good activity and stability over 10 SESMR cycles, and showed advantages over the use of catalyst and sorbent mixture, including an extended prebreakthrough time and a higher catalytic activity. In particular, the Ni/CaO-Ca5Al6O14 extrudate consisting of 15 wt% (mass fraction) Ni, 61.7 wt% CaO and 23.3 wt% Ca5Al6O14 provided high activity and stability for the SESMR process, even at a low H2O/CH4 molar ratio of 2 over 20 SESMR cycles. These results clearly demonstrate that the Ni/CaO-Ca5Al6O14 extrudate is an interesting candidate for the SESMR process. (C) 2015 Elsevier B.V. All rights reserved.