SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 65 ›› Issue (1): 85-91.DOI: 10.1016/j.cjche.2023.06.001

• Full Length Article • 上一篇    下一篇

Boosting kinetic separation of ethylene and ethane on microporous materials via crystal size control

Yixuan Ma1, Cong Yu1, Lifeng Yang1, Rimin You1, Yawen Bo2, Qihan Gong2, Huabin Xing1,3,4, Xili Cui1,3,4   

  1. 1 Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310012, China;
    2 Fundamental Science & Advanced Technology Lab, PetroChina Petrochemical Research Institute, China National Petroleum Corporation, Beijing 102200, China;
    3 ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311200, China;
    4 Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Hangzhou 310027, China
  • 收稿日期:2023-03-18 修回日期:2023-06-06 出版日期:2024-01-28 发布日期:2024-04-17
  • 通讯作者: Qihan Gong,Corresponding authors at:Fundamental Science & Advanced Technology Lab, PetroChina Petrochemical Research Institute, China National Petroleum Corporation, Beijing 102200, China. E-mail:gongqihan@petrochina.com.cn;Xili Cui,Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310012, China. E-mail:cuixl@zju.edu.cn
  • 基金资助:
    This work is supported by the National Key Research and Development Program of China (2022YFB3806800); the National Natural Science Foundation of China (22122811, 22008209), the ShanxiZheda Institute of Advanced Materials and Chemical Engineering (2021SZ-TD008).

Boosting kinetic separation of ethylene and ethane on microporous materials via crystal size control

Yixuan Ma1, Cong Yu1, Lifeng Yang1, Rimin You1, Yawen Bo2, Qihan Gong2, Huabin Xing1,3,4, Xili Cui1,3,4   

  1. 1 Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310012, China;
    2 Fundamental Science & Advanced Technology Lab, PetroChina Petrochemical Research Institute, China National Petroleum Corporation, Beijing 102200, China;
    3 ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311200, China;
    4 Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Hangzhou 310027, China
  • Received:2023-03-18 Revised:2023-06-06 Online:2024-01-28 Published:2024-04-17
  • Contact: Qihan Gong,Corresponding authors at:Fundamental Science & Advanced Technology Lab, PetroChina Petrochemical Research Institute, China National Petroleum Corporation, Beijing 102200, China. E-mail:gongqihan@petrochina.com.cn;Xili Cui,Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310012, China. E-mail:cuixl@zju.edu.cn
  • Supported by:
    This work is supported by the National Key Research and Development Program of China (2022YFB3806800); the National Natural Science Foundation of China (22122811, 22008209), the ShanxiZheda Institute of Advanced Materials and Chemical Engineering (2021SZ-TD008).

摘要: The adsorptive separation of C2H4 and C2H6, as an alternative to distillation units consuming high energy, is a promising yet challenging research. The great similarity in the molecular size of C2H4 and C2H6 brings challenges to the regulation of adsorbents to realize efficient dynamic separation. Herein, we reported the enhancement of the kinetic separation of C2H4/C2H6 by controlling the crystal size of ZnAtzPO4 (Atz=3-amino-1,2,4-triazole) to amplify the diffusion difference of C2H4 and C2H6. Through adjusting the synthesis temperature, reactant concentration, and ligands/metal ions molar ratio, ZnAtzPO4 crystals with different sizes were obtained. Both single-component kinetic adsorption tests and binary-component dynamic breakthrough experiments confirmed the enhancement of the dynamic separation of C2H4/C2H6 with the increase in the crystal size of ZnAtzPO4. The separation selectivity of C2H4/C2H6 increased from 1.3 to 98.5 with the increase in the crystal size of ZnAtzPO4. This work demonstrated the role of morphology and size control of adsorbent crystals in the improvement of the C2H4/C2H6 kinetic separation performance.

关键词: Adsorption, Adsorbent, Ethylene, Binary mixture, Crystal size control, Kinetic separation

Abstract: The adsorptive separation of C2H4 and C2H6, as an alternative to distillation units consuming high energy, is a promising yet challenging research. The great similarity in the molecular size of C2H4 and C2H6 brings challenges to the regulation of adsorbents to realize efficient dynamic separation. Herein, we reported the enhancement of the kinetic separation of C2H4/C2H6 by controlling the crystal size of ZnAtzPO4 (Atz=3-amino-1,2,4-triazole) to amplify the diffusion difference of C2H4 and C2H6. Through adjusting the synthesis temperature, reactant concentration, and ligands/metal ions molar ratio, ZnAtzPO4 crystals with different sizes were obtained. Both single-component kinetic adsorption tests and binary-component dynamic breakthrough experiments confirmed the enhancement of the dynamic separation of C2H4/C2H6 with the increase in the crystal size of ZnAtzPO4. The separation selectivity of C2H4/C2H6 increased from 1.3 to 98.5 with the increase in the crystal size of ZnAtzPO4. This work demonstrated the role of morphology and size control of adsorbent crystals in the improvement of the C2H4/C2H6 kinetic separation performance.

Key words: Adsorption, Adsorbent, Ethylene, Binary mixture, Crystal size control, Kinetic separation