Etched ZIF-8 as a Filler in Mixed-Matrix Membranes for Enhanced CO2/N2 Separation |
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| Authors: | Yichen Zhou Mingmin Jia Dr. Xiongfei Zhang Prof. Dr. Jianfeng Yao |
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| Affiliation: | College of Chemical Engineering, Jiangsu Key Laboratory for the Chemistry & Utilization of Agricultural and Forest Biomass, Jiangsu Key Laboratory of Biomass-Based Green Fuels and Chemicals, Nanjing Forestry University Department, Nanjing, Jiangsu, 210037 P.R. China |
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| Abstract: | Zeolite ZIF-8 has been etched with acid to form microporous ZIF-8-E crystals. These were then introduced into a polyethersulfone (PES) membrane matrix to enhance its CO2/N2 separation performance. Open through pores of size about 100 nm formed in the ZIF-8 crystals allow the ingrowth of polyethersulfone chains, ensuring a reduction in the number of nonselective voids, thereby achieving better interaction between ZIF-8-E and PES. As a result, the CO2/N2 separation performance of the ZIF-8-E/PES membrane increased significantly, showing a CO2 permeability of 15.7 Barrer and a CO2/N2 ideal selectivity of 6.5. |
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| Keywords: | acid etching gas separation metal–organic frameworks mixed-matrix membranes polyethersulfones zeolites |
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