文献类型：期刊文献

英文题名：Ni-Al2O3/Ni-foam catalyst with enhanced heat transfer for hydrogenation of CO2 to methane

作者：Li, Yakun[1];Zhang, Qiaofei[1];Chai, Ruijuan[1];Zhao, Guofeng[1];Liu, Ye[1];Lu, Yong[1];Cao, Fahai[2]

机构：[1]E China Normal Univ, Sch Chem & Mol Engn, Shanghai Key Lab Green Chem & Chem Proc, Shanghai 200062, Peoples R China;[2]E China Univ Sci & Technol, Coll Chem Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：61

期号：12

起止页码：4323

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20153101088604);WOS:【SCI-EXPANDED(收录号:WOS:000363775800022)】；

基金：This work was financially supported by the "973 program" (2011CB201403) from the MOST of China, and the NSF of China (21473057, 21273075, and U1462129).

语种：英文

外文关键词：heterogeneous catalysis; structured catalyst; methanation; foam; computational fluid dynamics simulation

摘要：Monolithic Ni-Al2O3/Ni-foam catalyst is developed by modified wet chemical etching of Ni-foam, being highly active/selective and stable in strongly exothermic CO2 methanation process. The as-prepared catalysts are characterized by x-ray diffraction scanning electron microscopy, inductively coupled plasma atomic emission spectrometry, and H-2-temperature programmed reduction-mass spectrometry. The results indicate that modified wet chemical etching method is working efficiently for one-step creating and firmly embedding NiO-Al2O3 composite catalyst layer (approximate to 2 m) into the Ni-foam struts. High CO2 conversion of 90% and high CH4 selectivity of >99.9% can be obtained and maintained for a feed of H-2/CO2 (molar ratio of 4/1) at 320 degrees C and 0.1 MPa with a gas hourly space velocity of 5000 h(-1), throughout entire 1200 h test over 10.2 mL such monolithic catalysts. Computational fluid dynamics calculation and experimental measurement consistently confirm a dramatic reduction of hotspot temperature due to enhanced heat transfer. (c) 2015 American Institute of Chemical Engineers