Comparative study on oxidation of methane to ethane and ethylene over Na2WO4–Mn/SiO2 catalysts prepared by different methods
文献类型：期刊论文
| 作者 | Song HL(宋焕玲) ; Zhao J(赵军); Chou LJ(丑凌军); Yang J(杨建)
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| 刊名 | Journal of Molecular Catalysis A: Chemical
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| 出版日期 | 2006 |
| 卷号 | 245页码:272-277 |
| 关键词 | Na2WO4–Mn/SiO2 catalyst Oxidative coupling of methane Prepared method |
| ISSN号 | 1381-1169 |
| 通讯作者 | 李树本 |
| 中文摘要 | The 5 wt% Na2WO4–2 wt% Mn/SiO2 catalysts have been prepared by the incipient wetness impregnation method, mixture slurry method and sol–gel method, and their catalytic performances for the oxidative coupling of methane (OCM) are evaluated in a continuous micro-reactor. 30% of CH4 conversion and 70% of C2 selectivity have been obtained in methane-oxygen co-feed without any dilutes over these catalysts. X-ray diffraction (XRD) studies indicate that the main crystallite phases of catalysts are Mn2O3, Na2WO4 and α-cristobalite, and different precursors of silica are transformed ultimately into highly crystallite α-cristobalite. XPS results show that Na,Wand Mn are mainly distributed on the surface of catalyst prepared by the incipient wetness impregnation method, but more uniform between the surface and bulk on the catalysts prepared by other two methods. Comparing with the catalyst prepared by the incipient wetness impregnation method, that of prepared by the mixture slurry method has an excellent stability and can alleviate the loss of active components during a 500 h run. Structure changes indicate that α-cristobalite is not indispensable for effective Na2WO4–Mn/SiO2 catalysts. |
| 收录类别 | SCI |
| 资助信息 | the Ministry of Science and Technology of China (Grant 1999022406);Nature Science Foundation of China (Grant 20378081) |
| 语种 | 英语 |
| 公开日期 | 2014-01-10 |
| 源URL | [http://210.77.64.217/handle/362003/5028]  |
| 专题 | 兰州化学物理研究所_OSSO国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Song HL,Zhao J,Chou LJ,et al. Comparative study on oxidation of methane to ethane and ethylene over Na2WO4–Mn/SiO2 catalysts prepared by different methods[J]. Journal of Molecular Catalysis A: Chemical,2006,245:272-277. |
| APA | 宋焕玲,赵军,丑凌军,&杨建.(2006).Comparative study on oxidation of methane to ethane and ethylene over Na2WO4–Mn/SiO2 catalysts prepared by different methods.Journal of Molecular Catalysis A: Chemical,245,272-277. |
| MLA | 宋焕玲,et al."Comparative study on oxidation of methane to ethane and ethylene over Na2WO4–Mn/SiO2 catalysts prepared by different methods".Journal of Molecular Catalysis A: Chemical 245(2006):272-277. |
入库方式： OAI收割
来源：兰州化学物理研究所
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