催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (3): 255-258.

• 研究论文 • 上一篇    下一篇

以介孔分子筛为硅源合成的超微β沸石特性及其加氢裂化性能

陈松1,2,许杰2,阳永荣1,王靖岱1,2,张晓萍2,张奎喜2   

  1. 1 浙江大学材料与化学工程学院联合化学反应工程研究所, 浙江杭州 312000; 2 抚顺石油化工研究院, 辽宁抚顺 113001
  • 收稿日期:2006-03-25 出版日期:2006-03-25 发布日期:1984-10-26

Nanometer β Zeolite Made from Mesoporous Zeolite and Its Hydrocracking Performance

CHEN Song1,2*, XU Jie1, YANG Yongrong1, WANG Jingdai1, ZHANG Xiaoping2, ZHANG Kuixi2   

  1. 1 UNILAB Research Centre of Chemical Reaction Engineering, Zhejiang University, Hangzhou 312000, Zhejiang, China; 2 Fushun Research Institute of Petroleum and Petrochemicals, SINOPEC, Fushun 113001, Liaoning, China
  • Received:2006-03-25 Online:2006-03-25 Published:1984-10-26

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摘要： 以介孔分子筛MCM-41为硅源,采用水热晶化法合成了微孔β沸石. 按照这种方法得到的β沸石除了具备微孔沸石的全部特点外,孔结构也继承了其前体的一些介孔特性,与传统方法合成得到的β沸石相比,其孔径高出30%以上,孔容更高出60%以上,而且晶粒小, B酸酸度高,从而改善了其在大分子反应过程中的扩散和反应性能. 因此,当以这种方法合成的β沸石作为加氢裂化催化剂裂解组分用于处理重质烃物料时,催化剂的活性和中油选择性同时得到了明显改善,与采用传统方法得到的β沸石相比,动力学活性提高近60%,特别是中油选择性显著提高了2.5%.

关键词: &beta, 沸石, 介孔分子筛, 水热合成, 加氢裂化催化剂

Abstract: MCM-41, a typical mesoporous molecular sieve, was used as silicon source to synthesize β zeolite in hydrothermal process. The β zeolite not only has all characteristics of a microporous zeolite but also inherits some properties of a mesoporous molecular sieve. Its pore diameter and pore volume are 30% and 60%, respectively, higher than that of the β zeolite prepared by the traditional method. Moreover it has smaller crystal grains and much more B acidity. Therefore, when being used as the cracking component in a hydrocracking catalyst, it shows improved catalytic performance. The dynamic activity is promoted by 60% and the middle distillate selectivity is significantly increased by 2.5% compared with the typical commercial hydrocracking catalyst.

Key words: &beta, zeolite, mesoporous zeolite, hydrothermal synthesis, hydrocracking catalyst