文献类型：期刊文献

英文题名：Galvanic Deposition of Silver on 80-μm-Cu-fiber for Gas-phase Oxidation of Alcohols

作者：Zhao, Guofeng[1];Li, Yakun[1];Zhang, Qiaofei[1];Deng, Miaomiao[1];Cao, Fahai[2];Lu, Yong[1]

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

年份：2014

卷号：60

期号：3

起止页码：1045

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20140817364217);WOS:【SCI-EXPANDED(收录号:WOS:000331338600018)】；

基金：This work was funded by the "973 program" (2011CB201403) from the MOST of China, the NSF of China (21273075, 21076083, 20973063), the Fundamental Research Funds for the Central Universities, the Shanghai Rising-Star Program (10HQ1400800), the Specialized Research Fund for the Doctoral Program of Higher Education (20090076110006), and the Shanghai Leading Academic Discipline Project (B409).

语种：英文

外文关键词：Catalysts - Gases - Heat transfer - Silver - Copper oxides - Fibers - Oxidation - Deposition

摘要：Microstructured Ag-based catalysts were developed by galvanically depositing Ag onto 80-μm-Cu-fibers for the gas-phase oxidation of alcohols. By taking advantages including large voidage, open porous structure and high heat/mass transfer, as-made catalysts provided a nice combination of high activity/selectivity and enhanced heat transfer. The best catalyst was Ag-10/80-Cu-fiber-400 (Ag-loading: 10 wt%; Cu-fiber pretreated at 400 °C in air), being effective for oxidizing acyclic, benzylic and polynary alcohols. For benzyl alcohol, conversion of 94% was achieved with 99% selectivity to benzaldehyde at 300 °C using a high WHSV of 20 h-1. Computational fluid dynamics (CFD) calculation and experimental result illustrated significant enhancement of the heat transfer. The temperature difference from reactor wall to central line was about 10-20 °C for the Ag-10/80-Cu-fiber-400, much lower than that of 100-110 °C for the Ag-10-Cu-2/Al2O3 at equivalent conversion and selectivity. Synergistic interaction between Cu2O and Ag was discussed, being assignable to the activity improvement. ? 2014 American Institute of Chemical Engineers.