Tailoring the Transport Properties of Zeolitic Imidazolate Frameworks by Post-Synthetic Thermal Modification

Type
Article

Authors
Zhang, Chen
Koros, William J.

KAUST Grant Number
KUS-I1-011-21

Date
2015

Abstract
Understanding how to control transport properties of zeolitic imidazolate frameworks (ZIFs) is critical to extend ZIF-based membranes and adsorbents to a wide spectrum of gas and vapor separations. In this work, we report a facile post-synthetic thermal modification (PSTM) technique to tailor ZIFs' transport properties by balancing diffusivity and diffusion selectivity. With controllable dissociation of framework methyl groups from a precursor ZIF (ZIF-8), we have prepared thermally modified ZIFs showing substantially increased n-butane diffusivity and attractive n/iso-butane diffusion selectivity. Hybrid ZIF/polymer mixed-matrix membranes formed using these thermally modified ZIFs are expected to deliver attractive butane isomer separation performance. Membranes based on such materials can potentially be used to retrofit refinery alkylation units for producing premium gasoline blending stocks.

Citation
Zhang, C., & Koros, W. J. (2015). Tailoring the Transport Properties of Zeolitic Imidazolate Frameworks by Post-Synthetic Thermal Modification. ACS Applied Materials & Interfaces, 7(42), 23407–23411. doi:10.1021/acsami.5b07769

Acknowledgements
W.J.K. acknowledges financial support from Roberto C. Goizueta, Chair for Excellence in Chemical Engineering, King Abdullah University of Science and Technology (Award KUS-I1-011-21), and Office of Basic Energy Science of the U.S. Department of Energy (Grant DE-FG02-04ER15510).

Publisher
American Chemical Society (ACS)

Journal
ACS APPLIED MATERIALS & INTERFACES

DOI
10.1021/acsami.5b07769

Additional Links
https://pubs.acs.org/doi/10.1021/acsami.5b07769

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