| Na-W-Mn/SiO2催化剂体系中Na对甲烷氧化偶联制乙烯的作用 |
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| 引用本文： | 季生福,李树本,高玲,刘育,牛建中,许传芝.Na-W-Mn/SiO2催化剂体系中Na对甲烷氧化偶联制乙烯的作用[J].催化学报,1998,19(6):526-529. |
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| 作者姓名： | 季生福 李树本 高玲 刘育 牛建中 许传芝 |
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| 作者单位： | 中国科学院兰州化学物理研究所羰基合成与选择氧化实验 |
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| 摘 要： | 制备了一系列不同Ｎａ的含量的Ｎａ－Ｗ－Ｍｎ／ＳｉＯ２催化剂，并进行了它们的甲烷氧化偶联制乙烯反应性能的评价和ＸＰＳ，ＸＲＤ表征。研究结果发现，由于Ｎａ的表面富集引起了Ｗ和Ｍｎ向表面迁移，从而在催化剂表面形成了活化和选择氧化甲烷的Ｎａ－Ｏ－Ｍｎ和Ｎａ－Ｏ－Ｗ活性中心，这表明Ｎａ是甲烷高转化率和乙烯高选择性必不可少的活性组分。
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| 关 键 词： | 甲烷 氧化偶联 乙烯 |
| 收稿时间： | 1998-12-25 |
THE ROLE OF THE SODIUM IN THE OXIDATIVE COUPLING OF METHANE OVER Na W Mn/SiO 2 CATALYSTS |
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| Ji Shengfu,Li Shuben,Gao Ling,Liu Yu,Niu Jianzhong,Xu Chuanzhi.THE ROLE OF THE SODIUM IN THE OXIDATIVE COUPLING OF METHANE OVER Na W Mn/SiO 2 CATALYSTS[J].Chinese Journal of Catalysis,1998,19(6):526-529. |
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| Authors: | Ji Shengfu Li Shuben Gao Ling Liu Yu Niu Jianzhong Xu Chuanzhi |
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| Abstract: | Na W Mn/SiO 2 catalysts with different sodium content (%) were prepared and their catalytic performance for the oxidative coupling of methane had been investigated. XPS and XRD results indicated that Na enriched on the surface of the catalysts might lead to the migration of W and Mn from the bulk to the surface. The active sites of activating CH 4, Na O Mn and Na O W species, were formed on the surface of Na W Mn/SiO 2 catalysts. These results confirmed that the sodium was an essential active component for high CH 4 conversion and C 2H 4 selectivity. |
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| Keywords: | Sodium oxide Tungsten trioxide Manganese oxide Silica Supported catalyst Methane Oxidative coupling Ethylene |
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