Mixed-linker zeolitic imidazolate framework mixed-matrix membranes for aggressive CO2 separation from natural gas

Handle URI:
http://hdl.handle.net/10754/598845
Title:
Mixed-linker zeolitic imidazolate framework mixed-matrix membranes for aggressive CO2 separation from natural gas
Authors:
Thompson, Joshua A.; Vaughn, Justin T.; Brunelli, Nicholas A.; Koros, William J.; Jones, Christopher W.; Nair, Sankar
Abstract:
Zeolitic imidazolate framework (ZIF) materials are a promising subclass of metal-organic frameworks (MOF) for gas separations. However, due to the deleterious effects of gate-opening phenomena associated with organic linker rotation near the limiting pore apertures of ZIFs, there have been few demonstrations of improved gas separation properties over pure polymer membranes when utilizing ZIF materials in composite membranes for CO2-based gas separations. Here, we report a study of composite ZIF/polymer membranes, containing mixed-linker ZIF materials with ZIF-8 crystal topologies but composed of different organic linker compositions. Characterization of the mixed-linker ZIFs shows that the mixed linker approach offers control over the porosity and pore size distribution of the materials, as determined from nitrogen physisorption and Horváth-Kawazoe analysis. Single gas permeation measurements on mixed-matrix membranes reveal that inclusion of mixed-linker ZIFs yields membranes with better ideal CO2/CH4 selectivity than membranes containing ZIF-8. This improvement is shown to likely occur from enhancement in the diffusion selectivity of the membranes associated with controlling the pore size distribution of the ZIF filler. Mixed-gas permeation experiments show that membranes with mixed-linker ZIFs display an effective plasticization resistance that is not typical of the pure polymeric matrix. Overall, we demonstrate that mixed-linker ZIFs can improve the gas separation properties in composite membranes and may be applicable to aggressive CO2 concentrations in natural gas feeds. © 2013 Elsevier Inc. All rights reserved.
Citation:
Thompson JA, Vaughn JT, Brunelli NA, Koros WJ, Jones CW, et al. (2014) Mixed-linker zeolitic imidazolate framework mixed-matrix membranes for aggressive CO2 separation from natural gas. Microporous and Mesoporous Materials 192: 43–51. Available: http://dx.doi.org/10.1016/j.micromeso.2013.06.036.
Publisher:
Elsevier BV
Journal:
Microporous and Mesoporous Materials
KAUST Grant Number:
KUS-Il-011-21
Issue Date:
Jul-2014
DOI:
10.1016/j.micromeso.2013.06.036
Type:
Article
ISSN:
1387-1811
Sponsors:
This work was supported by King Abdullah University of Science and Technology under Award No. KUS-I1-011-21.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorThompson, Joshua A.en
dc.contributor.authorVaughn, Justin T.en
dc.contributor.authorBrunelli, Nicholas A.en
dc.contributor.authorKoros, William J.en
dc.contributor.authorJones, Christopher W.en
dc.contributor.authorNair, Sankaren
dc.date.accessioned2016-02-25T13:42:19Zen
dc.date.available2016-02-25T13:42:19Zen
dc.date.issued2014-07en
dc.identifier.citationThompson JA, Vaughn JT, Brunelli NA, Koros WJ, Jones CW, et al. (2014) Mixed-linker zeolitic imidazolate framework mixed-matrix membranes for aggressive CO2 separation from natural gas. Microporous and Mesoporous Materials 192: 43–51. Available: http://dx.doi.org/10.1016/j.micromeso.2013.06.036.en
dc.identifier.issn1387-1811en
dc.identifier.doi10.1016/j.micromeso.2013.06.036en
dc.identifier.urihttp://hdl.handle.net/10754/598845en
dc.description.abstractZeolitic imidazolate framework (ZIF) materials are a promising subclass of metal-organic frameworks (MOF) for gas separations. However, due to the deleterious effects of gate-opening phenomena associated with organic linker rotation near the limiting pore apertures of ZIFs, there have been few demonstrations of improved gas separation properties over pure polymer membranes when utilizing ZIF materials in composite membranes for CO2-based gas separations. Here, we report a study of composite ZIF/polymer membranes, containing mixed-linker ZIF materials with ZIF-8 crystal topologies but composed of different organic linker compositions. Characterization of the mixed-linker ZIFs shows that the mixed linker approach offers control over the porosity and pore size distribution of the materials, as determined from nitrogen physisorption and Horváth-Kawazoe analysis. Single gas permeation measurements on mixed-matrix membranes reveal that inclusion of mixed-linker ZIFs yields membranes with better ideal CO2/CH4 selectivity than membranes containing ZIF-8. This improvement is shown to likely occur from enhancement in the diffusion selectivity of the membranes associated with controlling the pore size distribution of the ZIF filler. Mixed-gas permeation experiments show that membranes with mixed-linker ZIFs display an effective plasticization resistance that is not typical of the pure polymeric matrix. Overall, we demonstrate that mixed-linker ZIFs can improve the gas separation properties in composite membranes and may be applicable to aggressive CO2 concentrations in natural gas feeds. © 2013 Elsevier Inc. All rights reserved.en
dc.description.sponsorshipThis work was supported by King Abdullah University of Science and Technology under Award No. KUS-I1-011-21.en
dc.publisherElsevier BVen
dc.subjectGas separationen
dc.subjectMixed-matrix membranesen
dc.subjectPlasticizationen
dc.subjectZeolitic imidazolate frameworken
dc.titleMixed-linker zeolitic imidazolate framework mixed-matrix membranes for aggressive CO2 separation from natural gasen
dc.typeArticleen
dc.identifier.journalMicroporous and Mesoporous Materialsen
dc.contributor.institutionSchool of Chemical and Biomolecular Engineering, Atlanta, United Statesen
kaust.grant.numberKUS-Il-011-21en
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