文献类型：期刊文献

英文题名：Magnesium Modified Mesh-TYPE Cu/γ-Al2O3/Al Catalysts: Low Acid Density Catalysts for Methanol Steam Reforming

作者：Yang, Taotao[1];Zhang, Guiru[1];Zhang, Qi[1];Liu, Bin[2];Zhang, Li[2]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Dept Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2020

卷号：150

期号：10

起止页码：2978

外文期刊名：CATALYSIS LETTERS

收录：;EI(收录号：20201608413766);WOS:【SCI-EXPANDED(收录号:WOS:000524636000001)】；

基金：This work was financially supported by the National Key Research and Development Project (Grant No. 2018YFB0105603) and Fundamental Research Funds for the Central Universities (Grant No. 222201917013).

语种：英文

外文关键词：Mesh-type catalyst; Magnesia; Hydrogen production; Microreactor

摘要：Methanol steam reforming (MSR) is regarded as one of the effective technologies for in-situ hydrogen generation. A novel mesh-type gamma-Al2O3/Al support was prepared by anodization technology. To decrease dimethyl ether (DME) yield in MSR system, magnesium was doped to the gamma-Al2O3/Al to modify acidity. The results show that the acid density of the gamma-Al2O3/Al support can be decreased from 1.423 mu mol/m(2) to 1.122 mu mol/m(2), resulting in the decrease in DME yield from 70.2 to 16.7%. Meanwhile, various CuMgx/gamma-Al2O3/Al catalysts were prepared and the effects of MgO on the distribution and reducibility of CuO on the support were investigated. The results show that the dispersion of CuO was improved and reduction temperature was decreased with Mg doping. Finally, four pieces of mesh structured CuMg/gamma-Al2O3/Al catalysts (4*8 cm(2)) were applied into the microreactor with the channel height of 2 mm. CuMg/gamma-Al2O3/Al catalyst showed excellent catalytic performance with 100% methanol conversion, 98.2% hydrogen yield, without DME at 250 degrees C, 4000 mL/(g h) GHSV. Furthermore, the diffusion limitation was investigated by Damkohler number (Da), the results indicated the diffusion influence can be neglected in the microreactor over mesh-type catalysts. [GRAPHICS]