| Na-W-Mn/SiO_2催化剂中Na对甲烷氧化偶联制乙烯的作用(英文) |
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| 引用本文： | 季生福,李树木,刘育,高玲,牛建中,许传芝.Na-W-Mn/SiO_2催化剂中Na对甲烷氧化偶联制乙烯的作用(英文)[J].天然气化学杂志,1999,8(1):1-8. |
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| 作者姓名： | 季生福 李树木 刘育 高玲 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（OSSO）国家重点实验室!甘肃(季生福，刘育，牛建中)，兰州，730000(李树木，高玲)，兰州，7(许传芝) |
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| 摘 要： | 采用常规浸渍法制备了一系列Na（wt％）含量不同的Na－W－Mn／SiO_2催化剂，在流动态微型固定床常压反应装置上评价了这些催化剂的甲烷氧化偶联（OCM）制乙烯催化反应性能，并进行了XPS、XRD表征。实验结果表明，Na含量为0．39wt％－2．34Wt％的Na－W－Mn／SiO_2催化剂具有好的甲烷氧化偶联制乙烯性能，此时Mn以对反应有利的晶相存在，同时由于Na的表面富集，引起W、Mn向催化剂表面发生迁移。由此可见，在Na－W－Mn／SiO_2催化剂中，Na是甲烷转化和乙烯生成不可缺少的活性组分之一。
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| 关 键 词： | Na－W－Mn／SiO_2催化剂 Na 甲烷氧化偶联 XPS XRD |
ROLE OF SODIUM IN THE OXIDATIVE COUPLING OF METHANE OVER Na-W-Mn/SiO2 CATALYSTS |
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| Shengfu Ji,Shuben Li,Yu Liu,Ling Gao,Jianzhong Niu,Chuanzhi Xu.ROLE OF SODIUM IN THE OXIDATIVE COUPLING OF METHANE OVER Na-W-Mn/SiO2 CATALYSTS[J].Journal of Natural Gas Chemistry,1999,8(1):1-8. |
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| Authors: | Shengfu Ji Shuben Li Yu Liu Ling Gao Jianzhong Niu Chuanzhi Xu |
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| Institution: | State Key Laboratory of Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics, The Chinese Academy of SetencesLanzhou, Gansu 730000 |
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| Abstract: | Na-W-Mn/SiO2 catalysts with different sodium contents (wt%)were Prepared and used for the oxidative coupling of methane (OCM). Thecatalysts were characterized by XPS and XRD. It was found that thecatalysts With sodium contents between 0.39Wt% and 2.34Wt% eXhibitedgood catalytic performances and the crystalline phases of the manganeseoxides Which tavoured the reaction were formed. Owing to the addition ofNa to the WO4-Mn/SiO2 catalyst, W and W moved towards the surface.These results suggested that the sodium is an essential active componene fora high CH4 conversion and a high C2H4 selectivity. |
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| Keywords: | Na-W-Mn/SiO2 catalyst sodium OCM XPS XRD |
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