Carbon dioxide selective mixed matrix composite membrane containing ZIF-7 nano-fillers

Handle URI:
http://hdl.handle.net/10754/562568
Title:
Carbon dioxide selective mixed matrix composite membrane containing ZIF-7 nano-fillers
Authors:
Li, Tao; Pan, Yichang; Peinemann, Klaus-Viktor ( 0000-0003-0309-9598 ) ; Lai, Zhiping ( 0000-0001-9555-6009 )
Abstract:
Mixed matrix materials made from selective inorganic fillers and polymers are very attractive for the manufacturing of gas separation membranes. But only few of these materials could be manufactured into high-performance asymmetric or composite membranes. We report here the first mixed matrix composite membrane made of commercially available poly (amide-b-ethylene oxide) (Pebax®1657, Arkema) mixed with the nano-sized zeolitic imidazole framework ZIF-7. This hybrid material has been successfully deposited as a thin layer (less than 1μm) on a porous polyacrylonitrile (PAN) support. An intermediate gutter layer of PTMSP was applied to serve as a flat and smooth surface for coating to avoid polymer penetration into the porous support. Key features of this work are the preparation and use of ultra-small ZIF-7 nano-particles (around 30-35nm) and the membrane processability of Pebax®1657. SEM pictures show that excellent adhesion and almost ideal morphology between the two phases has been obtained simply by mixing the as-synthesized ZIF-7 suspension into the Pebax®1657 dope, and no voids or clusters can be observed. The performance of the composite membrane is characterized by single gas permeation measurement of CO2, N2 and CH4. Both, permeability (PCO2 up to 145barrer) and gas selectivity (CO2/N2 up to 97 and CO2/CH4 up to 30) can be increased at low ZIF- loading. The CO2/CH4 selectivity can be further increased to 44 with the filler loading of 34wt%, but the permeability is reduced compared to the pure Pebax®1657 membrane. Polymer chain rigidification at high filler loading is supposed to be a reason for the reduced permeability. The composite membranes prepared in this work show better performance in terms of permeance and selectivity when compared with asymmetric mixed matrix membranes described in the recent literature. Overall, the ZIF 7/Pebax mixed matrix membranes show a high performance for CO2 separation from methane and other gas streams. They are easy to fabricate, which makes them attractive for industrial scale gas separation. © 2012 Elsevier B.V.
KAUST Department:
Advanced Membranes and Porous Materials Research Center; Physical Sciences and Engineering (PSE) Division; Chemical and Biological Engineering Program
Publisher:
Elsevier
Journal:
Journal of Membrane Science
Issue Date:
Jan-2013
DOI:
10.1016/j.memsci.2012.09.006
Type:
Article
ISSN:
03767388
Appears in Collections:
Articles; Advanced Membranes and Porous Materials Research Center; Physical Sciences and Engineering (PSE) Division; Chemical and Biological Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorLi, Taoen
dc.contributor.authorPan, Yichangen
dc.contributor.authorPeinemann, Klaus-Viktoren
dc.contributor.authorLai, Zhipingen
dc.date.accessioned2015-08-03T10:43:06Zen
dc.date.available2015-08-03T10:43:06Zen
dc.date.issued2013-01en
dc.identifier.issn03767388en
dc.identifier.doi10.1016/j.memsci.2012.09.006en
dc.identifier.urihttp://hdl.handle.net/10754/562568en
dc.description.abstractMixed matrix materials made from selective inorganic fillers and polymers are very attractive for the manufacturing of gas separation membranes. But only few of these materials could be manufactured into high-performance asymmetric or composite membranes. We report here the first mixed matrix composite membrane made of commercially available poly (amide-b-ethylene oxide) (Pebax®1657, Arkema) mixed with the nano-sized zeolitic imidazole framework ZIF-7. This hybrid material has been successfully deposited as a thin layer (less than 1μm) on a porous polyacrylonitrile (PAN) support. An intermediate gutter layer of PTMSP was applied to serve as a flat and smooth surface for coating to avoid polymer penetration into the porous support. Key features of this work are the preparation and use of ultra-small ZIF-7 nano-particles (around 30-35nm) and the membrane processability of Pebax®1657. SEM pictures show that excellent adhesion and almost ideal morphology between the two phases has been obtained simply by mixing the as-synthesized ZIF-7 suspension into the Pebax®1657 dope, and no voids or clusters can be observed. The performance of the composite membrane is characterized by single gas permeation measurement of CO2, N2 and CH4. Both, permeability (PCO2 up to 145barrer) and gas selectivity (CO2/N2 up to 97 and CO2/CH4 up to 30) can be increased at low ZIF- loading. The CO2/CH4 selectivity can be further increased to 44 with the filler loading of 34wt%, but the permeability is reduced compared to the pure Pebax®1657 membrane. Polymer chain rigidification at high filler loading is supposed to be a reason for the reduced permeability. The composite membranes prepared in this work show better performance in terms of permeance and selectivity when compared with asymmetric mixed matrix membranes described in the recent literature. Overall, the ZIF 7/Pebax mixed matrix membranes show a high performance for CO2 separation from methane and other gas streams. They are easy to fabricate, which makes them attractive for industrial scale gas separation. © 2012 Elsevier B.V.en
dc.publisherElsevieren
dc.subjectCarbon dioxide separationen
dc.subjectComposite membraneen
dc.subjectGas separationen
dc.subjectMixed matrix membraneen
dc.subjectZeolitic imidazole frameworken
dc.titleCarbon dioxide selective mixed matrix composite membrane containing ZIF-7 nano-fillersen
dc.typeArticleen
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentChemical and Biological Engineering Programen
dc.identifier.journalJournal of Membrane Scienceen
kaust.authorPan, Yichangen
kaust.authorPeinemann, Klaus-Viktoren
kaust.authorLai, Zhipingen
kaust.authorLi, Taoen
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