Direct Synthesis of Dimethyl Carbonate from CO2 and CH3OH Using 4Å Molecular Sieve Supported Cu−Ni Bimetal Catalyst

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Direct Synthesis of Dimethyl Carbonate from CO2 and CH3OH Using 4Å Molecular Sieve Supported Cu−Ni Bimetal Catalyst

HuiLing Chen¹,孟跃中²,DongMei Han¹,Min Xiao¹,ShuanJin Wang¹,YiXin Lu¹

1.
2. 中山大学理工学院环境材料研究所

收稿日期:2011-04-21 修回日期:2012-04-12 发布日期:2012-07-06
通讯作者: 孟跃中

4Å分子筛负载Cu−Ni双金属催化剂用于CO2和CH3OH直接合成碳酸二甲酯

Received:2011-04-21 Revised:2012-04-12 Published:2012-07-06
Contact: YueZhong Meng

摘要/Abstract

摘要：

关键词: Molecular sieve,Cu?Ni bimetal catalysis, Dimethyl carbonate, Carbon dioxide, Methanol

Abstract: The 4? molecular sieve supported Cu?Ni bimetal catalysts for direct synthesis of dimethyl carbonate (DMC) from CO2 and CH3OH were prepared and investigated. The synthesized catalysts were fully characterized by BET, XRD, TPR, IR, NH3?TPD and CO2?TPD 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 wt% 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.

Key words: Molecular sieve,Cu?Ni bimetal catalysis, Dimethyl carbonate, Carbon dioxide, Methanol

中图分类号:

HuiLing Chen 孟跃中 DongMei Han Min Xiao ShuanJin Wang YiXin Lu. Direct Synthesis of Dimethyl Carbonate from CO2 and CH3OH Using 4Å Molecular Sieve Supported Cu−Ni Bimetal Catalyst [J]. .