Issue 42, 2023

Halogen-modified metal–organic frameworks for efficient separation of alkane from natural gas

Abstract

As a rich green energy source, natural gas is widely used in many fields such as the chemical industry, automobile energy, and daily life. However, it is very challenging to separate and recover C2H6 and C3H8 from natural gas. Metal–organic frameworks (MOFs) as an emerging type of multi-pore porous materials show huge potential in gas adsorption separation. Herein, we report pillar-layered MOFs, Ni (BDC)(DABCO)0.5 (DMOF-X), modified by halogen atoms (F, Cl, Br), and investigate their CH4/C2H6/C3H8 separation performance. The experimental results show that DMOF-Cl exhibited a extremely high adsorption capacity for C3H8 and C2H6. Under the conditions of 298 K and 100 kPa, the adsorption capacities for C3H8 and C2H6 on DMOF-Cl are as high as 6.23 and 4.94 mmol g−1, which are superior to the values for most of the porous materials that have been reported. In addition, DMOF-Cl also shows high C3H8/CH4 (5: 85, V/V) and C2H6/CH4 (10: 85, V/V) separation selectivities, with values of 130.9 and 12.5, respectively. Finally, DMOF-Cl also demonstrated great potential as an adsorbent for separating C3H8/C2H6/CH4.

Graphical abstract: Halogen-modified metal–organic frameworks for efficient separation of alkane from natural gas

Supplementary files

Article information

Article type
Paper
Submitted
23 maj 2023
Accepted
06 lip 2023
First published
12 lip 2023

Dalton Trans., 2023,52, 15462-15466

Halogen-modified metal–organic frameworks for efficient separation of alkane from natural gas

Z. Song, Y. Zheng, Y. Chen, Y. Cai, R. Wei and J. Gao, Dalton Trans., 2023, 52, 15462 DOI: 10.1039/D3DT01554H

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