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DIFFUSION OF AROMATIC HYDROCARBON IN ZSM-5 CALCULATED BY IMPROVED DATA TREATMENT OF ZERO LENGTH COLUMN METHOD

Han Minghan,Yin Xiuyan and Jin Yong (Department of Chemical Engineering,Tsinghua University, Beijing 100084)Chen Shu and Zhang Jirui (Center for Chemical Engineering, Beijing Institute of Clothing Technology,Beijing 100029)   

  • Online:2000-02-25 Published:2000-02-25

改进的ZLC数据处理法──计算芳烃在ZSM-5晶内扩散系数

韩明汉,尹秀艳,金涌,陈曙,张吉瑞   

  1. 清华大学化学工程系!北京100084,清华大学化学工程系!北京100084,清华大学化学工程系!北京100084,北京服装学院化工研究所!北京100029,北京服装学院化工研究所!北京100029

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Abstract: Intracrystalline diffusivities for aromatic carbon in ZSM 5 were measured by ZLC method. Experiments were analyzed by two traditional methods (LT method and ST method) and a new full range method. The traditional mathematical description of the ZLC technique by LT method or ST method will cause deviation unavoidably. The new full range method avoids the problems caused by the traditional methods, so it is more suitable to analying ZLC experiments. Diffusion coefficients calculated by FR method are greater than those by LT method, but smaller than by ST method.

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