高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (5): 814.

• 研究论文 • 上一篇    下一篇

Na-W-Mn/SiO2催化剂中的金属-载体作用

陈宏善1, 牛建中2, 张兵2, 李树本2   

  1. 1. 西北师范大学物理系, 兰州 730070;
    2. 中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室, 兰州 730000
  • 收稿日期:2000-04-06 出版日期:2001-05-24 发布日期:2001-05-24
  • 通讯作者: 陈宏善(1963年出生),男,博士,副教授,从事化学物理研究.E-mail:chenhs@nwnu.edu.cn E-mail:chenhs@nwnu.edu.cn
  • 基金资助:

    国家重大基础研究专项经费;甘肃省教委科学基金(项目:991-19)资助

Metal-Support Interaction in Na-W-Mn/SiO2 Catalyst

CHEN Hong-Shan1, NIU Jian-Zhong2, ZHANG Bing2, LI Shu-Ben2   

  1. 1. Departmentof Physics, Northwest Normal University, Lanzhou 730070, China;
    2. State Key Laboratory for Oxo Synthesisand Selective Oxidation, Lanzhou Instituteof Chemical Physics, Chinese Academyof Sciences, Lanzhou 730000, China
  • Received:2000-04-06 Online:2001-05-24 Published:2001-05-24

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摘要： 研究了Na-W-Mn/SiO2催化剂中不同活性组份对载体结构的影响.结果表明,Na的诱导作用使无定型氧化硅在焙烧过程中相变为α-方石英结构,同时伴有比表面积的大幅度下降;单独担载Na时,硅小球经焙烧后基本无微孔存在,担载W则能使硅小球焙烧后形成较为均一的微米孔道.SiO2载体在Na和W作用下发生的结构变化对催化剂的选择性起重要作用.

关键词: Na-W-Mn/SiO2催化剂, 甲烷氧化偶联, 金属-载体作用

Abstract: The interaction of metal components with silica support in Na-W-Mn/SiO2 was studied. The inducing effect of sodium makes amorphous silica transferred to α-cristobalite during calcination, and the specific surface area decreases enormously as a consequence. When sodium alone is loaded, the silica has almost no micropores retained after calcination. When tungsten is loaded together with sodium, quite regular pores at the size of micron can be formed in silica during the phase transition.

Key words: Na-W-Mn/SiO2, Oxidative coupling of methane, Metal-support interaction

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