Direct oxidation of Dimethyl Ether to Dimethoxymethane over Sm2O3 modified MnCl2-H4SiW12O40/SiO2 catalyst

摘要：

The promotional effects of Sm2O3 on the MnCl2-H4SiW12O40.SiO2 catalyst and the effect of reaction time fordimethyl ether(DME)direct-oxidation to dimethoxymethane(DMM)have been investigated in a continuous flow typefixed-bed reactor．It was found that Sm2O3 addition can significantly improve the activity of MnCl2-H4SiW12O40/SiO2，and the DMM selectivity is remarkably increased from 36.3％to 60-3％．The techniques of XRD，NH3-TPD，XPS andSEM were used to characterize the catalysts．Sm2O3 addition increases the binding energy of Mn2p3/2 and remains Mnin as MnO2．Sm2O3 addition maybe balances the distribution of the acidity sites and redox sites of the catalyst,andfurther increases the catalyst activity．

关键词： Dimethyl ether Dimethoxymethane Direct-oxidation Samarium oxide MnCl2-H4SiW12040/SiO2

作者: Qingde Zhang Yisheng Tan Caihong Yang Yizhuo Han

作者单位: State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China

会议类型: 国际会议

会议名称: 3rd International DME Conference & 5th Asian DME Conference(第三届国际二甲醚会议暨第五届亚洲二甲醚会议)

会议地点: 上海

会议语种:英文

页码: 1-5

在线出版日期: 2008-09-21（万方平台首次上网日期，不代表论文的发表时间）