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分子筛负载钒配合物催化剂对烃类氧化的择形选择性研究
Shape Selectivity of Zeolite-Encapsulated Vanadium Picolinic Complexes Catalyst for Oxidation of Alkanes
【摘要】 研究了四价钒配合物VO(pic)2·H2O及其分子筛负载型催化剂VO(pic)2-NaY对芳香烃和正构烷烃的催化氧化性能.实验结果证明,VO(pic)2-NaY催化剂具有与VO(pic)2·H2O配合物催化剂相似的催化氧化活性,而且使对位产物(芳香烃为底物)和伯醇(底物为正构烷烃)的选择性得到提高,显示出均相配合物催化剂所不具有的择形选择性.
【Abstract】 Zeoliteencapsulated vanadium(Ⅳ) picolinic complexes catalyst and corresponding homogeneous catalyst VO(pic)2·H2O were prepared. The catalysts were used in the oxidation of toluene, nhexane and nheptane with CO(NH\-2)2·H2O\-2 as oxidant under 308 K. The results suggested that the "shipinabottle" catalyst retains the same catalytic activity as homogeneous catalyst VO(pic)2·H2O and exhibits good shape selectivity as compared to the unencapsulated complexes.
【关键词】 分子筛;
金属配合物;
ship-in-a-bottle;
催化氧化;
择形选择性;
【Key words】 Zeolite; Vanadium picolinic complex; Ship-in-a-bottle; Catalytic oxidation; Shape selectivity;
【Key words】 Zeolite; Vanadium picolinic complex; Ship-in-a-bottle; Catalytic oxidation; Shape selectivity;
【基金】 国家自然科学基金资助项目(2976019).
- 【文献出处】 分子催化 ,Journal of Molecular Catalysis (China) , 编辑部邮箱 ,2002年06期
- 【分类号】O643.32
- 【被引频次】5
- 【下载频次】195