文献类型：期刊文献

英文题名：Microfibrous entrapment of Ni/Al₂O₃ for dry reforming of methane: Heat/mass transfer enhancement towards carbon resistance and conversion promotion

作者：Chen, Wei[1];Sheng, Wenqian[1];Cao, Fahai[2];Lu, Yong[1]

机构：[1]E China Normal Univ, Dept Chem, 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：2012

卷号：37

期号：23

起止页码：18021

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000311865700040)】；

基金：This work was funded by the NSF of China (21273075, 21076083, 20973063), the "973 program" (2011CB201403) from the MOST of China, the Shanghai Rising-Star Program (10QH1400800), and the Specialized Research Fund for the Doctoral Program of Higher Education (20090076110006).

语种：英文

外文关键词：Methane; Carbon dioxide; Process intensification; Structured catalytic reactor; Nickel catalyst; Carbon resistance

摘要：An 8-mu m-copper microfibrous entrapped Ni/Al2O3 (Cu-MFE-Ni/AlO) composite catalyst was developed for demonstrating the process intensification effectiveness of the novel microfibrous entrapment technology on dry reforming of methane (DRM), which is highly regarded for CH4 utilizing and CO2 chemical cycling. Computational fluid dynamics (CFD) calculation was employed to illustrate the significant enhancement of the heat transfer of the microfibrous structured bed at steady working state. The results indicated that the average bed temperature of Cu-MFE-Ni/AlO was 1039 K, 75 K higher than that of packed bed with Ni/AlO (PB-Ni/AlO), when the wall temperature was set at 1073 K. As a result, carbon resistance of the catalyst bed was significantly improved by a thermodynamic way along with visible conversion promotion. For instance, at temperature of 1073 K, more than 4-fold reduction of average carbon deposition rate was achieved in the Cu-MFE-Ni/AlO composite bed compared to the PB-Ni/AlO, while the CH4 conversion was promoted from 84% on the PB-Ni/AlO to 89% on our Cu-MFE-Ni/AlO composite bed with a gas hourly space velocity (GHSV) of 20,000 mL g(cat)(-1) h(-1). Moreover, such microfibrous entrapment technology also provided a unique combination of small catalyst particle size (0.15-0.18 mm) and entirely open structure with large void volume (71.3 vol%) thereby leading to enhanced mass transfer and high permeability (low pressure drop). Copyright (c) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.