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zeolitic-imidazolate-framework-8-nanocrystal
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CO2 and CH4 diffusivities through synthesized ZIF-8 nanocrystals: an experimental and theoretical investigation
, Article Microporous and Mesoporous Materials ; Volume 324 , 2021 ; 13871811 (ISSN) ; Bastani, D ; Norouzbahari, S ; Ghadimi, A ; Sharif University of Technology
Elsevier B.V
2021
Abstract
CO2 separation is of paramount importance owing to global warming abatement, as well as sour natural gas sweetening. Mixed matrix membranes (MMMs), containing porous zeolitic imidazolate frameworks (ZIFs), in particular ZIF-8, have drawn noticeable attention due to their favorable separation performance. However, there are evidences of discrepancies in the reported values of gas diffusion coefficients/diffusivities through ZIFs, even for common well-studied gases, such as CO2 and CH4 in the literature. These discrepancies might be attributed to the surface/barrier effects, which are intensified by ZIF-8 nanocrystals downsizing. In this paper, an effort has been made to determine the impact...