高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (10): 1459.

• 论文 • 上一篇    下一篇

分子筛和γ-Al2O3混合载体上负载Ni和W的加氢裂解催化剂的EXAFS研究

张健1, 鲁海龙1, 孙建伟1, 姚建东1, 李全芝1, 关明华2, 王继锋2, 丁连会2, 尹泽群2, 胡天斗3, 谢亚宁3   

  1. 1. 复旦大学化学系, 上海 200433;
    2. 抚顺石油化工研究院, 抚顺 113001;
    3. 中国科学院高能物理研究所, 北京 100039
  • 收稿日期:1999-08-02 出版日期:2000-10-24 发布日期:2000-10-24
  • 通讯作者: 李全芝(1932年出生),女,教授,博士生导师,从事分子筛催化材料研究.
  • 基金资助:

    国家自然科学基金重点项目(批准号:297330701);中国石油化工集团科技开发公司资助

EXAFS Study of Ni/W/Zeolite/Al2O3 Hydrocracking Catalyst Sulfurized with Different Modified Zeolites

ZHANG Jian1, LU Hai-Long1, SUN Jian-Wei1, YAO Jian-Dong1, LI Quan-Zhi1, GUAN Ming-Hua2, WANG Ji-Feng2, DING Lian-Hui2, YIN Ze-Qu2, HU Tian-Dou3, XIE Ya-Ning3   

  1. 1. Fudan University, Departmentof Chemistry, Shanghai 200437, China;
    2. Fushun Petroleum Research Institute, Fushun 113001, China;
    3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
  • Received:1999-08-02 Online:2000-10-24 Published:2000-10-24

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摘要： 运用EXAFS技术对Ni和W负载于4种改性Y分子筛与Al2O3混合载体上的加氢裂解催化剂进行了研究,结果表明,硫化态催化剂中W和Ni均未被完全硫化,除硫化态外,大部分W处于钨氧硫(WOS)状态,而部分Ni为氧化物,不同分子筛对Ni和W的硫化程度的影响不同.另外催化剂中存在少量的NiWS相,载体的B酸位与催化剂中的NiWS相的多少有较好的相关性.

关键词: 加氢裂解催化剂, 分子筛, EXAFS, NiWS相

Abstract: Four hydrocracking catalysts supported on different kinds of modified Y zeolites were studied by utilizing EXAFS(Extend X-ray Absorption Fine Structure).The results show that the Ni and W in the catalysts have not been thoroughly sulfided. Apart from the sulfided state，the tungsten in the sulfided catalysts exists in a state of oxosulfided tungsten while some nickels exist in their oxide state. In addition，it also shows that there are NiWS species in the sulfided catalysts and the amount of which shows a good cor-relation with the Bronsted acid sites of the mixture supports of zeolites and γ-Al2O3.It means that the Ni-WS species maybe exist mainly in the cavities of the zeolites and the tungsten in micropore zeolites is more difficult to be sulfided than that on the surface of amorphous Al2O3.

Key words: Hydrocracking catalyst, Zeolites, EXAFS, NiWS phase

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