SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2022, Vol. 42 ›› Issue (2): 10-16.DOI: 10.1016/j.cjche.2021.08.011

• Recent Advances in Adsorptive Separation Materials and Technologies • 上一篇    下一篇

A pillared-layer metal-organic framework for efficient separation of C3H8/C2H6/CH4 in natural gas

Pengtao Guo, Miao Chang, Tongan Yan, Yuxiao Li, Dahuan Liu   

  1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
  • 收稿日期:2021-05-27 修回日期:2021-08-13 出版日期:2022-02-28 发布日期:2022-03-30
  • 通讯作者: Dahuan Liu,E-mail:liudh@mail.buct.edu.cn
  • 基金资助:
    The financial support of the National Natural Science Foundation of China (No. 21978005) is greatly appreciated.

A pillared-layer metal-organic framework for efficient separation of C3H8/C2H6/CH4 in natural gas

Pengtao Guo, Miao Chang, Tongan Yan, Yuxiao Li, Dahuan Liu   

  1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2021-05-27 Revised:2021-08-13 Online:2022-02-28 Published:2022-03-30
  • Contact: Dahuan Liu,E-mail:liudh@mail.buct.edu.cn
  • Supported by:
    The financial support of the National Natural Science Foundation of China (No. 21978005) is greatly appreciated.

摘要: Metal-organic frameworks (MOFs) have great potentials as adsorbents for natural gas purification. However, the trade-off between selectivity and adsorption capacity remains a challenge. Herein, we report a pillared-layer metal-organic framework Ni(HBTC)(bipy) for efficiently separating the C3H8/C2H6/CH4 mixture. The experimental results show that the adsorption capacity of C3H8 and C2H6 on Ni(HBTC)(bipy) are as high as 6.18 and 5.85 mmol·g-1, while only 0.93 mmol·g-1 for CH4 at 298 K and 100 kPa. Especially, the adsorption capacity of C3H8 at 5 kPa can reach an unprecedented 4.52 mmol·g-1 and for C2H6 it is 1.48 mmol·g-1 at 10 kPa. The ideal adsorbed solution theory predicted C3H8/CH4 selectivity is as high as 1857.0, superior to most of the reported materials. Breakthrough experiment results indicated that material could completely separate the C3H8/C2H6/CH4 mixture. Therefore, Ni(HBTC)(bipy) is a promising material for separation of natural gas.

关键词: Adsorption, Light hydrocarbons, Metal-organic framework, Natural gas, Selectivity, Separation

Abstract: Metal-organic frameworks (MOFs) have great potentials as adsorbents for natural gas purification. However, the trade-off between selectivity and adsorption capacity remains a challenge. Herein, we report a pillared-layer metal-organic framework Ni(HBTC)(bipy) for efficiently separating the C3H8/C2H6/CH4 mixture. The experimental results show that the adsorption capacity of C3H8 and C2H6 on Ni(HBTC)(bipy) are as high as 6.18 and 5.85 mmol·g-1, while only 0.93 mmol·g-1 for CH4 at 298 K and 100 kPa. Especially, the adsorption capacity of C3H8 at 5 kPa can reach an unprecedented 4.52 mmol·g-1 and for C2H6 it is 1.48 mmol·g-1 at 10 kPa. The ideal adsorbed solution theory predicted C3H8/CH4 selectivity is as high as 1857.0, superior to most of the reported materials. Breakthrough experiment results indicated that material could completely separate the C3H8/C2H6/CH4 mixture. Therefore, Ni(HBTC)(bipy) is a promising material for separation of natural gas.

Key words: Adsorption, Light hydrocarbons, Metal-organic framework, Natural gas, Selectivity, Separation