Cation exchange in an anionic metal-organic framework enhancing propylene/propane separation

Xue Zhang, Hui Juan Tang, Min Zeng, Rong Yang, Yu Wang, Kai Jie Chen

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Highly selective adsorptive separation of propylene/propane (C3H6/C3H8) using metal-organic frameworks (MOFs) is a promising approach to reducing energy consumption in the chemical industry. Here, we report a 3D anionic MOF obtained by the exchange of dimethylamine cations with small K+ ions. 77 K N2 isotherms proved that the pore volume increased from 0.30 cm3 g−1 to 0.42 cm3 g−1 after ion exchange. Moreover, at near room temperatures (273 K and 298 K), both single-component gas adsorption capacity and selectivity of C3H6/C3H8 were enhanced. The C3H6/C3H8 separation potential was further confirmed by breakthrough experiments with equimolar C3H6/C3H8 mixtures. Similar separation properties were also observed in ethylene/ethane separation.

Original languageEnglish
Pages (from-to)6039-6043
Number of pages5
JournalCrystEngComm
Volume25
Issue number43
DOIs
StatePublished - 4 Oct 2023

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