Catalytic oxidation of dimethyl ether to dimethoxymethane over mncl2-h4siw12o40/sio2 catalyst
文献类型：期刊论文
| 作者 | Zhang Qingde; Tan Yisheng; Yang Caihong; Liu Yuqin; Han Yizhuo |
| 刊名 | Chinese journal of catalysis
 |
| 出版日期 | 2006-10-01 |
| 卷号 | 27期号:10页码:916-920 |
| 关键词 | Dimethyl ether Catalytic oxidation Dimethoxymethane Manganese chloride Tungstositicic acid Silica Supported catalyst |
| ISSN号 | 0253-9837 |
| 通讯作者 | Zhang qingde() |
| 英文摘要 | The h4siw12 o-40/sio2 heteropolyacid catalyst for the catalytic oxidation of dimethyl ether to dimethoxymethane was prepared by the impregnation method. mncl2, sncl4, and cucl2 were used to modify the catalyst to improve its activity and selectivity. the catalytic oxidation reaction was carried out in a continuous flow fixed-bed reactor. h4siw12o40/sio2 is active for the dimethyl ether oxidation, but the selectivity for dimethoxymethane is as low as 4.8%. modification of h4siw12o40/sio2 with 5% mncl2 significantly improves the dimethoxymethane selectivity up to 27.9% at 633 k, while sncl4- and cucl2-modified catalysts give dimethoxymethane selectivities of 16.4% and 0.4%, respectively, under the same conditions. the effects of the mncl2 content (2%-20%) and reaction temperature (573-633 k) on the reaction were investigated. a dimethyl ether conversion of 8.6% and a dimethoxymethane selectivity of 36.3% were obtained under the optimum conditions of 593 k and 5% mncl2 content. x-ray diffraction patterns of the catalysts show that mncl2 and h4siw12o40 interact and are dispersed uniformly on the support. infrared spectra demonstrate that the keggin structure of h4siw12o40 remains almost unchanged over the modified catalyst. ammonia temperature-programmed desorption profiles indicate that mncl2 modification reduces the acidity of h4siw12o40/sio2 by decreasing the acid center numbers. |
| WOS关键词 | SELECTIVE OXIDATION ; METHANOL ; PERFORMANCE ; METHYLAL |
| WOS研究方向 | Chemistry ; Engineering |
| WOS类目 | Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical |
| 语种 | 英语 |
| WOS记录号 | WOS:000241931800017 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2378632 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhang Qingde |
| 作者单位 | 1.Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China 2.Grad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Qingde,Tan Yisheng,Yang Caihong,et al. Catalytic oxidation of dimethyl ether to dimethoxymethane over mncl2-h4siw12o40/sio2 catalyst[J]. Chinese journal of catalysis,2006,27(10):916-920. |
| APA | Zhang Qingde,Tan Yisheng,Yang Caihong,Liu Yuqin,&Han Yizhuo.(2006).Catalytic oxidation of dimethyl ether to dimethoxymethane over mncl2-h4siw12o40/sio2 catalyst.Chinese journal of catalysis,27(10),916-920. |
| MLA | Zhang Qingde,et al."Catalytic oxidation of dimethyl ether to dimethoxymethane over mncl2-h4siw12o40/sio2 catalyst".Chinese journal of catalysis 27.10(2006):916-920. |
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来源：中国科学院大学
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