Gas adsorption in shaped zeolitic imidazolate framework-8

doi:10.1016/j.cjche.2015.01.015

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (8): 1275-1282.DOI: 10.1016/j.cjche.2015.01.015

Gas adsorption in shaped zeolitic imidazolate framework-8

Jiqin Zhu, Lu Jiang, Chengna Dai, Na Yang, Zhigang Lei

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

收稿日期:2014-04-23 修回日期:2015-01-11 出版日期:2015-08-28 发布日期:2015-09-26
通讯作者: Zhigang Lei
基金资助:
Supported by theNationalNatural Science Foundation of China (21176010, 21476009, 21406007, and U1462104).

Gas adsorption in shaped zeolitic imidazolate framework-8

Jiqin Zhu, Lu Jiang, Chengna Dai, Na Yang, Zhigang Lei

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Received:2014-04-23 Revised:2015-01-11 Online:2015-08-28 Published:2015-09-26
Contact: Zhigang Lei
Supported by:
Supported by theNationalNatural Science Foundation of China (21176010, 21476009, 21406007, and U1462104).

摘要/Abstract

摘要： Zeolitic imidazolate framework-8 (ZIF-8) was prepared through a solve-thermal reactionmethod and then shaped using different additives. The influence of the shaping conditions on the microstructure of the shaped samples was characterized by the XRD, BET, and SEM techniques. The results demonstrate that the compressive strength of the various shaped tablets is greatly increased and capable of meeting the industrial requirements compared to the unshaped ZIF-8 and that the loss rate of specific surface areas was maintained at 10% after the addition of 10%(by mass) binder and 10%(by mass) solvent. The adsorption isotherms of CO₂, CH₄, C₃H₈, and C₃H₆ on powdery ZIF-8 and the shaped tablets (T-shaped ZIF-8, C-shaped ZIF-8, and N-shaped ZIF-8) were determined through volumetric measurements under different pressures and temperatures (298.2, 323.2, and 348.2 K). The adsorption capacities of the gases on both the ZIF-8 powder and the shaped tablets follow the order C₃H₆ > C₃H₈ > CO₂ > CH₄. Furthermore, the results show that the adsorption capacities of the gases on the shaped tablets are lower by approximately 10%-20% than those on the powdery ZIF-8. In fact, the adsorption equilibrium isotherms for CO₂, CH₄, C₃H₈, and C₃H₆ on both powdery and shaped ZIF-8 can be well described by the Langmuir equation.

关键词: ZIF-8, Shaping, Gas adsorption, Model reduction, Materials

Abstract: Zeolitic imidazolate framework-8 (ZIF-8) was prepared through a solve-thermal reactionmethod and then shaped using different additives. The influence of the shaping conditions on the microstructure of the shaped samples was characterized by the XRD, BET, and SEM techniques. The results demonstrate that the compressive strength of the various shaped tablets is greatly increased and capable of meeting the industrial requirements compared to the unshaped ZIF-8 and that the loss rate of specific surface areas was maintained at 10% after the addition of 10%(by mass) binder and 10%(by mass) solvent. The adsorption isotherms of CO₂, CH₄, C₃H₈, and C₃H₆ on powdery ZIF-8 and the shaped tablets (T-shaped ZIF-8, C-shaped ZIF-8, and N-shaped ZIF-8) were determined through volumetric measurements under different pressures and temperatures (298.2, 323.2, and 348.2 K). The adsorption capacities of the gases on both the ZIF-8 powder and the shaped tablets follow the order C₃H₆ > C₃H₈ > CO₂ > CH₄. Furthermore, the results show that the adsorption capacities of the gases on the shaped tablets are lower by approximately 10%-20% than those on the powdery ZIF-8. In fact, the adsorption equilibrium isotherms for CO₂, CH₄, C₃H₈, and C₃H₆ on both powdery and shaped ZIF-8 can be well described by the Langmuir equation.

Key words: ZIF-8, Shaping, Gas adsorption, Model reduction, Materials

Jiqin Zhu, Lu Jiang, Chengna Dai, Na Yang, Zhigang Lei. Gas adsorption in shaped zeolitic imidazolate framework-8[J]. Chinese Journal of Chemical Engineering, 2015, 23(8): 1275-1282.

Jiqin Zhu, Lu Jiang, Chengna Dai, Na Yang, Zhigang Lei. Gas adsorption in shaped zeolitic imidazolate framework-8[J]. Chin.J.Chem.Eng., 2015, 23(8): 1275-1282.

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Gas adsorption in shaped zeolitic imidazolate framework-8

Gas adsorption in shaped zeolitic imidazolate framework-8

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