正丁烷及丁烯-1在不同硅铝比ZSM-5分子筛上吸附的实验与模型

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正丁烷及丁烯-1在不同硅铝比ZSM-5分子筛上吸附的实验与模型

王斐^a; 汪文川^a; 黄世萍^a; 滕加伟^b; 谢在库^b

^a Laboratory of Material and Molecular Simulation, College of Chemical Engineering, Beijing
University of Chemical Technology, Beijing 100029, China
^b Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-06-28 发布日期:2007-06-28
通讯作者: 王斐

Experiment and modeling of pure and binary adsorption of n-butane and butene-1 on ZSM-5
zeolites with different Si/Al ratios

WANG Fei^a; WANG Wenchuan^a; HUANG Shiping^a; TENG Jiawei^b; XIE Zaiku^b

^a Laboratory of Material and Molecular Simulation, College of Chemical Engineering, Beijing
University of Chemical Technology, Beijing 100029, China
^b Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, China

Received:1900-01-01 Revised:1900-01-01 Online:2007-06-28 Published:2007-06-28
Contact: WANG Fei

摘要/Abstract

摘要： Four ZSM-5 zeolite catalysts with different Si/Al ratios for the catalytic cracking of C4
fractions to produce ethylene and propylene were prepared in this study. First, the
adsorption isotherms of pure n-butane and butene-1 and their mixtures on these catalysts at
300K and p＝0—100kPa were measured using the intelligent gravimetric analyzer. The
experimental results indicate that the presence of Al can significantly affect the
adsorption of butene-1 than that of n-butane on ZSM-5 zeolites. Then, the double Langmuir
(DL) model was applied to study the pure gas adsorption on ZSM-5 zeolites for pure n-butane
and butene-1. By combining the DL model with the ideal adsorbed solution theory (IAST), the
IAST-DL model was applied to model the butene-1 (1)/n-butane (2) binary mixture adsorption
on ZSM-5 zeolites with different Si/Al ratios. The calculated results are in good agreement
with the experimental data, indicating that the IAST-DL model is effective for the present
systems. Finally, the adsorption over a wide range of variables was predicted at low
pressure and 300K by the model proposed. It is found that the selectivity of butene-1 over
n-butane increases linearly with the decrease of Si/Al ratio. A correlation between the
selectivity and Si/Al ratio of the sample was proposed at 300K and p=0.08MPa.

关键词: ZSM-5 zeolite;n-butane;butene-1;adsorption isotherm;Si/Al ratio;selectivity

Abstract: Four ZSM-5 zeolite catalysts with different Si/Al ratios for the catalytic cracking of C4
fractions to produce ethylene and propylene were prepared in this study. First, the
adsorption isotherms of pure n-butane and butene-1 and their mixtures on these catalysts at
300K and p＝0—100kPa were measured using the intelligent gravimetric analyzer. The
experimental results indicate that the presence of Al can significantly affect the
adsorption of butene-1 than that of n-butane on ZSM-5 zeolites. Then, the double Langmuir
(DL) model was applied to study the pure gas adsorption on ZSM-5 zeolites for pure n-butane
and butene-1. By combining the DL model with the ideal adsorbed solution theory (IAST), the
IAST-DL model was applied to model the butene-1 (1)/n-butane (2) binary mixture adsorption
on ZSM-5 zeolites with different Si/Al ratios. The calculated results are in good agreement
with the experimental data, indicating that the IAST-DL model is effective for the present
systems. Finally, the adsorption over a wide range of variables was predicted at low
pressure and 300K by the model proposed. It is found that the selectivity of butene-1 over
n-butane increases linearly with the decrease of Si/Al ratio. A correlation between the
selectivity and Si/Al ratio of the sample was proposed at 300K and p=0.08MPa.

Key words: ZSM-5 zeolite, n-butane, butene-1, adsorption isotherm, Si/Al ratio, selectivity

王斐, 汪文川, 黄世萍, 滕加伟, 谢在库. 正丁烷及丁烯-1在不同硅铝比ZSM-5分子筛上吸附的实验与模型[J]. CIESC Journal.

WANG Fei, WANG Wenchuan, HUANG Shiping, TENG Jiawei, XIE Zaiku. Experiment and modeling of pure and binary adsorption of n-butane and butene-1 on ZSM-5
zeolites with different Si/Al ratios[J]. .

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正丁烷及丁烯-1在不同硅铝比ZSM-5分子筛上吸附的实验与模型

Experiment and modeling of pure and binary adsorption of n-butane and butene-1 on ZSM-5
zeolites with different Si/Al ratios

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正丁烷及丁烯-1在不同硅铝比ZSM-5分子筛上吸附的实验与模型

Experiment and modeling of pure and binary adsorption of n-butane and butene-1 on ZSM-5 zeolites with different Si/Al ratios

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Experiment and modeling of pure and binary adsorption of n-butane and butene-1 on ZSM-5
zeolites with different Si/Al ratios