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| Cu-Pd/MCM-22催化剂上二甲醚低温水解反应 | |
| 引用本文： | 方奕文,宋一兵,孙长勇,王文进,郭锐华,林维明.Cu-Pd/MCM-22催化剂上二甲醚低温水解反应[J].催化学报,2006,27(8):650-652. |
| 作者姓名： | 方奕文 宋一兵 孙长勇 王文进 郭锐华 林维明 |
| 作者单位： | 1. 华南理工大学化工与能源学院,广东广州,510641;汕头大学化学系,广东汕头,515063 2. 汕头大学化学系,广东汕头,515063 3. 华南理工大学化工与能源学院,广东广州,510641 |
| 摘 要： | 考察了分子筛的类型、硅铝比及Cu和Pd改性对分子筛催化剂上二甲醚低温水解活性的影响. 结果表明,酸性的MCM-22和HZSM-5分子筛催化剂具有较高的二甲醚水解活性,且其活性随着分子筛硅铝比的增加而降低. 这表明分子筛的类型及酸性对催化剂性能有重要影响,具有超笼结构的MCM-22分子筛上B酸中心的良好可接近性,使得该分子筛催化剂的水解活性较相同硅铝比的HZSM-5分子筛高. 与改性前相比, Cu和Pd改性后的MCM-22催化剂显示出更高的二甲醚水解活性. |
| 关 键 词： | 铜 钯 MCM-22 二甲醚 甲醇 低温水解 碳酸二甲酯 |
| 文章编号： | 0253-9837（2006）08-0650-03 |
| 收稿时间： | 05 10 2006 12:00AM |
| 修稿时间： | 2006-05-10 |
Low-Temperature Hydrolysis of Dimethyl Ether over Cu-Pd/MCM-22 Catalyst |
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| FANG Yiwen,SONG Yibing,SUN Changyong,WANG Wenjin,GUO Ruihua,LIN Weiming.Low-Temperature Hydrolysis of Dimethyl Ether over Cu-Pd/MCM-22 Catalyst[J].Chinese Journal of Catalysis,2006,27(8):650-652. | |
| Authors: | FANG Yiwen SONG Yibing SUN Changyong WANG Wenjin GUO Ruihua LIN Weiming |
| Institution: | 1. School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510641 , Guangdong, China ; 2. Department of Chemistry, Shantou University, Shantou 515063, Guangdong , China |
| Abstract: | The catalytic performance of various zeolite catalysts for dimethyl ether (DME) hydrolysis was investigated. The aim is to obtain a highly active catalyst for hydrolysis of DME at low temperature, which can be coupled with the Cu-Pd/AC catalyst to construct a bifunctional catalyst for coupling the DME hydrolysis with methanol carbonylation. The results showed that the acidic zeolite catalysts HZSM-5 and MCM-22 exhibited DME hydrolysis activity at relatively low temperatures. Compared with HZSM-5, the good accessibility of the strong Brnsted acid sites located in MCM-22 super cages was responsible for higher conversion of DME. Further improvement in the catalytic activity was found on the MCM-22 catalyst modified by transition metals Pd and Cu. |
| Keywords: | copper palladium MCM-22 dimethyl ether methanol low-temperature hydrolysis dimethyl carbonate |
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