Volume 42, Issue 4 pp. 744-752
Research Article

Effect of the ZIF-8 Distribution in Mixed-Matrix Membranes Based on Matrimid® 5218-PEG on CO2 Separation

Roberto Castro-Muñoz

Corresponding Author

Roberto Castro-Muñoz

University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic

Correspondence: Roberto Castro-Muñoz ([email protected]), University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic.Search for more papers by this author
Vlastimil Fíla

Vlastimil Fíla

University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic

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First published: 21 January 2019
Citations: 51

Abstract

In theory, the combination of inorganic materials and polymers may provide a synergistic performance for mixed-matrix membranes (MMMs); however, the filler dispersion into the MMMs is a crucial technical parameter for obtaining compelling MMMs. The effect of the filler distribution on the gas separation performance of the MMMs based on Matrimid®-PEG 200 and ZIF-8 nanoparticles is demonstrated. The MMMs were prepared by two different membrane preparation procedures, namely, the traditional method and non-dried metal-organic framework (MOF) method. In CO2/CH4 binary mixtures, the MMMs were tested under fixed conditions and characterized by various methods. Finally, regardless of the MMM preparation procedure, the incorporation of 30 wt % ZIF-8 nanoparticles allowed to increase the CO2 permeability in MMMs. The ZIF-8 dispersion influenced significantly the separation factor.

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