文献类型：期刊文献

英文题名：A monolith CuNiFe/γ-Al2O3/Al catalyst for steam reforming of dimethyl ether and applied in a microreactor

作者：Deng, Xiaoqian[1];Yang, Taotao[1];Zhang, Qi[1];Chu, Yameng[1];Luo, Jie[2];Zhang, Li[3];Li, Ping[1]

机构：[1]East China Univ Sci & Technol, Dept Chem Engn, Shanghai 200237, Peoples R China;[2]PetroChina Southwest Oil & Gas Field Branch, Inst Environm Protect & Tech Safety Supervis, Chengdu 610051, Sichuan, Peoples R China;[3]East China Univ Sci & Technol, Dept Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：44

期号：5

起止页码：2417

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20190106336084);WOS:【SCI-EXPANDED(收录号:WOS:000457659800001)】；

基金：This work was financially supported by the Natural Science Foundation of Shanghai (Grant NO. 16ZR1408200) and Fundamental Research Funds for the Central Universities (Grant NO. 222201817013).

语种：英文

外文关键词：Hydrogen production; Catalyst; Microreactor; Damkohler number; Diffusion

摘要：Structured CuNi/gamma-Al2O3/Al catalyst exhibited a good stability in steam reforming of dimethyl ether (DME SR) system, but there was a high CO concentration in outlet gas (about 25%). For the problem, a series of CuNiFe/gamma-Al2O3/Al catalysts with different Fe content were prepared through impregnation method. It is found that the CO concentration obviously decreased after the addition of Fe. When the loading amount of Fe was 12.5 wt%, the catalyst presented the best performance: the conversion of DME reached 100% and the H-2 yield was over 0.9 in both the microreactor and fixed-bed reactor. Furthermore, cross-flow channels and parallel-flow channels were built respectively by mesh-type catalyst and plate-type catalyst in the microreactor. The gas/solid mass transfer limitations in both flow channels were investigated by Damkohler number (Da). The results showed that the Da values of cross flow were always <0.01, while the values of parallel flow were >0.01. It indicated that the diffusion over mesh-type catalyst was less influenced by temperature and reactor height, making it a more appropriate choice for the microreactor. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.