Direct Synthesis of Dimethyl Carbonate from CO_2 and CH_3OH Using 0.4nm Molecular Sieve Supported Cu-Ni Bimetal Catalyst

作     者：陈惠玲 王栓紧 肖敏 韩冬梅 卢一新 孟跃中 

作者机构：The Key Laboratory of Low-carbon Chemistry&Energy Conservation of Guangdong Province State Key Laboratory of Optoelectronic Materials and TechnologiesSun Yat-sen University Department of Chemistry&Medicinal Chemistry ProgramOffice of Life SciencesNational University of Singapore 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2012年第20卷第5期

页      面：906-913页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 07[理学] 0817[工学-化学工程与技术] 08[工学] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：Supported by the National High Technology Research and Development Program of China (2008AA03Z3472294,2009AA302410) the Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2010) the Guangdong Province Sci & Tech Bureau (2006B12401006, 2008A080800024) the Chinese Universities Basic Research Founding 

主　　题：molecular sieve Cu-Ni bimetal catalysis dimethyl carbonate carbon dioxide methanoi 

摘      要：The 0.4 nm molecular sieve supported Cu-Ni bimetal catalysts for direct synthesis of dimethyl carbonate (DMC) from CO 2 and CH 3 OH were prepared and investigated. The synthesized catalysts were fully characterized by BET, XRD (X-ray diffraction), TPR (temperature programmed reduction), IR (infra-red adsorption), NH 3-TPD (temperature programmed desorption) and CO 2-TPD (temperature programmed desorption) techniques. The results showed that the surface area of catalysts decreased with increasing metal content, and the metals as well as Cu-Ni alloy co-existed on the reduced catalyst surface. There existed interaction between metal and carrier, and moreover, metal particles affected obviously the acidity and basicity of carrier. The large amount of basic sites facilitated the activation of methanol to methoxyl species and their subsequent reaction with activated carbon dioxide. The catalysts were evaluated in a continuous tubular fixed-bed micro-gaseous reactor and the catalyst with bimetal loading of 20% (by mass) had best catalytic activities. Under the conditions of 393 K, 1.1 MPa, 5 h and gas space velocity of 510 h 1 , the selectivity and yield of DMC were higher than 86.0 % and 5.0 %, respectively.