文献类型：期刊文献

英文题名：Mechanistic insights into methanol-to-olefin reaction on an α-Mn2O3 nanocrystal catalyst

作者：Xu, Jing[1]; Ouyang, Like[1]; Luo, Yan[1]; Xu, Xi-Meng[1]; Yang, Zhen[1]; Zhang, Chengxi[2,3]; Gong, Jinlong[2,3]; Han, Yi-Fan[1]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; [2] Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; [3] School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

年份：2012

卷号：58

期号：11

起止页码：3474

外文期刊名：AIChE Journal

收录：EI(收录号：20124115558390)

语种：英文

外文关键词：Ethylene - Fourier transform infrared spectroscopy - Manganese oxide - Catalysts - Reflection - Methanol - Nanocrystals - Reaction intermediates

摘要：The synthesis and utilization of an α-Mn2O3 nanocrystal catalyst for methanol-to-olefin reaction is described. A methanol conversion of 35% and a maximum selectivity of 80% toward ethylene were obtained at 250°C. In particular, formaldehyde, a primary intermediate for the reaction, was used to produce ethylene via a coupling reaction. A conversion of 45% and a selectivity of 66% to ethylene were achieved at 150°C in a formaldehyde stream. In situ diffuse reflectance infrared Fourier transform spectra reveal the formation of the surface CH2-containing species during reaction, which implies that the main pathway for formaldehyde coupling is probably through interactions of those intermediates. In addition, the weakly adsorbed oxygen on the α-Mn2O3 nanocrystal surface was found to play an important role in this reaction. ? 2012 American Institute of Chemical Engineers AIChE J, 2012 Copyright ? 2012 American Institute of Chemical Engineers (AIChE).