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Crystals 2019, 9(1), 15; https://doi.org/10.3390/cryst9010015

Preparation of Mixed Matrix Membranes Containing ZIF-8 and UiO-66 for Multicomponent Light Gas Separation

1
Department of Chemical Engineering and Material Science, Chung-Ang University, 84, Heukseok-ro, Dongjak-gu, Seoul 06974, Korea
2
Department of Chemical Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 17104, Korea
*
Author to whom correspondence should be addressed.
Received: 26 November 2018 / Revised: 22 December 2018 / Accepted: 22 December 2018 / Published: 26 December 2018
(This article belongs to the Special Issue MOF-Based Membranes)
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Abstract

Mixed matrix membranes (MMMs) containing zeolitic imidazolite framework-8 (ZIF-8) and UiO-66 as microporous fillers were prepared and evaluated their potential for the separation of a gas mixture produced by a methane reforming process. Hydrothermal synthesis was performed to prepare both the ZIF-8 and UiO-66 crystals, with crystal sizes ranging from 50 to 70 nm for ZIF-8 and from 200 to 300 nm for UiO-66. MMMs were prepared with 15% filler loading for both MMM (ZIF-8) and MMM (UiO-66). MMM (UiO-66) exhibited H2 permeability of 64.4 barrer and H2/CH4 selectivity of 153.3 for single gas permeation, which are more than twice the values that were exhibited by a neat polymer membrane. MMM (ZIF-8) also showed better separation properties than that of a neat polymer membrane with H2 permeability of 27.1 barrer and H2/CH4 selectivity of 123.2. When a gas mixture consisting of 78% Ar/18% H2/4% CH4 flowed into the membranes at 5 bar, the H2 purity increased to as high as 93%. However, no improvement in the mixture gas separation performance was achieved by the MMMs as compared to that of a neat polymer membrane. View Full-Text
Keywords: mixed matrix membrane; metal oxide framework; gas separation; ZIF-8; UiO-66 mixed matrix membrane; metal oxide framework; gas separation; ZIF-8; UiO-66
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Kim, E.Y.; Kim, H.S.; Kim, D.; Kim, J.; Lee, P.S. Preparation of Mixed Matrix Membranes Containing ZIF-8 and UiO-66 for Multicomponent Light Gas Separation. Crystals 2019, 9, 15.

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