石油炼制与化工

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硅烷化处理对HZSM-5分子筛芳构化性能的影响

赵永华 王海彦 魏民   

  1. 辽宁工业大学,材料与化学工程学院 辽宁石油化工大学 石化学院 辽宁石油化工大学 石化学院
  • 收稿日期:2009-03-20 修回日期:1900-01-01 出版日期:2009-11-12 发布日期:2009-11-12
  • 通讯作者: 赵永华

EFFECT OF THE SILANATION OF HZSM-5 ZEOLITE ON ITS AROMATIZATION PERFORMANCE

  

  • Received:2009-03-20 Revised:1900-01-01 Online:2009-11-12 Published:2009-11-12

摘要: 以3-氨丙基三乙氧基硅烷为硅源,对HZSM-5进行硅烷化处理。考察硅烷含量对分子筛酸分布、催化活性和稳定性的影响。结果表明,随着硅烷含量的增加,分子筛表面L酸量基本没有变化,B酸量逐渐减小;液相产品中芳烃含量逐渐提高,且分子筛稳定性提高,硅烷的适宜量(以硅烷和分子筛的投料比计)为37.0%。

关键词: 硅烷化, 芳构化, HZSM-5分子筛

Abstract: HZSM-5 zeolite was treated with 3-aminopropyltriethoxysilane to study the effect of silane on the catalyst performance including the acidity distribution, catalytic activity and stability. Test results showed that as compared with the untreated HZSM-5 zeolite the amount of Lewis acid sites of the treated zeolite was basically unchanged; the amount of Brönsted acid sites decreased significantly with the increase of silane content, at the same time, the content of aromatic hydrocarbons in the liquid product increased gradually. Furthermore, the zeolite stability was improved, and the optimal silane content (the starting ratio of 3-aminopropyltriethoxysilane to HZSM-5 zeolite) was 37.0%.

Key words: silanation, aromatization, HZSM-5 zeolite