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];Gong, Jinlong[2];Han, Yi-Fan[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Tianjin Univ, Minist Educ, Sch Chem Engn & Technol, Key Lab Green Chem Technol, Tianjin 300072, Peoples R China

年份：2012

卷号：58

期号：11

起止页码：3474

外文期刊名：AICHE JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000309595600016)】；

基金：The authors are grateful to the support from the Chinese Education Ministry 111 project (B08021), the National Science Foundation (21006068, 21176071, 21106041), the Program for New Century Excellent Talents in University (NCET-10-0611), and the Program of Introducing Talents of Discipline to Universities (B06006), Shanghai PuJiang Talent Program (2010/10PJ1402500, 2011/11PJ1402400), Program of Science and Technology Commission of Shanghai Municipality (11JC1402700), Innovation Program of Shanghai Municipal Education Commission (11ZZ52, 11ZZ051), Shanghai Natural Science Foundation (11ZR1408400), Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials (Fudan University) (2010MCIMKF01), Creative Team Development Project of Ministry of Education (IRT0721) and Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：methanol-to-olefin; ethylene production; formaldehyde coupling; a-Mn2O3 nanocrystals; in situ diffuse reflectance infrared Fourier transform spectroscopy

摘要：The synthesis and utilization of an a-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 degrees 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 degrees 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 alpha-Mn2O3 nanocrystal surface was found to play an important role in this reaction. (c) 2012 American Institute of Chemical Engineers AIChE J, 2012