文献类型：期刊文献

英文题名：Development of a microchannel reactor concerning steam reforming of methanol

作者：Yu, Xinhai[1]; Tu, Shan-Tung[1]; Wang, Zhengdong[1]; Qi, Yunshi[1]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2006

卷号：116

期号：2

起止页码：123

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：2006029632951);WOS:【SCI-EXPANDED(收录号:WOS:000234869100005)】；

语种：英文

外文关键词：microchannel; diffusion bonding; catalyst; coating; steam reforming of methanol

摘要：To develop a portable power device using fuel cell technology, the miniaturization of the hydrogen production unit is indispensable. In this paper, preparation of a microchannel reactor concerning steam reforming of methanol (SRM) has been investigated by optimizing the parameters of diffusion bonding and the composition of catalyst coatings. The results show the microchannel reactor can be sealed successfully by diffusion bonding at the optimized parameters (900 degrees C, 20 MPa, 1 h). The most active and selective catalyst coating is Cu50/Zn50 [Ce5] (Cu/Zn/Ce=50/50/5, molar). It has been found that CeO2, has an important influence on improving catalytic activity, decreasing the outlet CO concentration, and strengthening the stability. Based on the characterization of catalyst coatings, it can be attributed to the increase in copper area and to the change in oxidation state of copper that results in the synergetic effect of Cu-0 and Cu+. In addition, the effects of reaction temperature, space velocity, molar ratio of methanol to water, and reaction time were also investigated in the developed microchannel reactor with the Cu50/Zn50 [Ce5]. The results show that the microchannel reactor can generate enough hydrogen for a power output of 11 W. (c) 2005 Elsevier B.V. All rights reserved.