高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (12): 1603.

• 研究简报 • 上一篇    下一篇

Si(CH3)3Cl修饰的HZSM-5酸性及正己烷芳构化的催化性能研究

矫庆泽, 蒋大振, 郑伟民   

  1. 吉林大学化学系, 长春, 130023
  • 收稿日期:1992-01-04 修回日期:1992-06-30 出版日期:1992-12-24 发布日期:1992-12-24
  • 通讯作者: 矫庆泽
  • 基金资助:

    国家自然科学基金

Studies on Acidity of HZSM-5 Modified by Si(CH3)3Cl and Its Catalytic Behaviour in n-Hexane Aromatization

JIAO Qing-Zhe, JIANG Da-Zhen, ZHENG Wei-Min   

  1. Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1992-01-04 Revised:1992-06-30 Online:1992-12-24 Published:1992-12-24

关键词: 正己烷, 酸性, 芳构化, 结焦

Abstract: The surface properties of HZSM-5 zeolite modified by Si(CH3)3Cl were studied by TPD,IR,27A1 MAS NMR.Catalytic reaction of n-hexane aromatization was investigated by continuous-reaction.The coke of catalysts was measured by DSC.It was found that the concentration of the strong Bronsted acid sites decreased and that of the stronger Lewis acid sites increased after modification by Si(CH3)3Cl.The TPDpeaks of NH3,which were presumally attributed to the stronger acid sites,were decreased by the deposition of Si(CH3)3Cl on the surface of the zeolite.The conversion of n-hexane and selectivities of aromatic compounds were controlled by changing the concentration of the stronger acid sites.But aromatic compounds distribution can be attained by controlling the pore opening and channel of the zeolite.

Key words: n-Hexane, Acidity, Aromatization, Coke

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