文献类型：期刊文献

英文题名：Gas-phase hydrogenation of maleic anhydride to γ-butyrolactone at atmospheric pressure over Cu-CeO2-Al2O3 catalyst

作者：Yu, Yang[1]; Guo, Yanglong[1]; Zhan, Wangcheng[1]; Guo, Yun[1]; Wang, Yanqin[1]; Wang, Yunsong[1]; Zhang, Zhigang[1]; Lu, Guanzhong[1]

机构：[1] Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

年份：2011

卷号：337

期号：1-2

起止页码：77

外文期刊名：Journal of Molecular Catalysis A: Chemical

收录：EI(收录号：20111013717760)

语种：英文

外文关键词：Maleic anhydride - Catalyst selectivity - Copper - Crystallite size - Alumina - Aluminum oxide - Atmospheric pressure - Gases - Hydrogenation - Catalyst deactivation - Precipitation (chemical)

摘要：Cu-CeO2-Al2O3 catalyst, prepared by co-precipitation method, was investigated for the gas-phase hydrogenation of maleic anhydride (MA) to γ-butyrolactone (GBL) at atmospheric pressure and the catalyst deactivation was also studied. Effects of catalyst composition, reaction temperature, and liquid hourly space velocity (LHSV) of raw material on the catalytic performance of Cu-CeO2-Al2O3 catalyst were investigated. The catalyst (molar ratio of Cu:Ce:Al = 1:1:2) showed better catalytic performance, in which both the conversion of MA and the selectivity of GBL kept 100% within two hours under the reaction conditions of 6 mL catalyst, 0.1 MPa, 220-280 °C, 30 mL min-1 H2, 0.6 h-1 LHSV of 20 wt.% MA/GBL. As for Cu-CeO2-Al 2O3 catalyst, smaller crystallite size of Cu and higher Cu surface area are favorable to increase its catalytic performance. The deactivation of Cu-CeO2-Al2O3 catalyst is due to formation of the compact wax-like deposition on the catalyst surface, which is probably ascribed to the strong adsorption of succinic anhydride and then polymerization on the catalyst surface. The catalytic performance of the regenerated catalyst can be recovered completely by the regeneration method of N2-air-H2 stage treatment. ? 2011 Elsevier B.V. All rights reserved.