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Pebax/two-dimensional MFI nanosheets mixed-matrix membranes for enhanced CO2 separation
State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, 135 Ya Guan Road, Jinnan District, Tianjin, 300350, China.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-7477-4960
State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, 135 Ya Guan Road, Jinnan District, Tianjin, 300350, China.
State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, 135 Ya Guan Road, Jinnan District, Tianjin, 300350, China.
2021 (English)In: Journal of Membrane Science, ISSN 0376-7388, E-ISSN 1873-3123, Vol. 636, article id 119612Article in journal (Refereed) Published
Abstract [en]

Zeolite crystals as inorganic fillers were widely applied in fabricating mixed matrix membranes (MMMs) for CO2 separation. The poor filler-matrix interaction and the aggregation of high-loaded fillers in MMMs restrict their advantage of overcoming the trade-off limitation between permeability and selectivity. The novel MMMs with two-dimensional (2D) MFI nanosheets as inorganic fillers and Pebax MH 1657 as the matrix were synthesized and applied to achieve an efficient separation of CO2/CH4 gas mixture for the first time. The large interfacial contact areas between MFI nanosheets and Pebax matrix improve their compatibility to form defect-free MMMs with better mechanical properties. The high-aspect-ratio MFI nanosheets function as solid and selective barriers to make MMMs possess a significant promotion in both CO2 permeability and CO2/CH4 selectivity without the trade-off limitation. The MMM containing 5 wt% of MFI nanosheets exhibited the optimum performance with CO2 permeability of 159.1 Barrer and CO2/CH4 selectivity of 27.4. The as-prepared MMMs showed an improvement of 63.5% in CO2 permeability and 76.4% in CO2/CH4 selectivity, compared to pristine Pebax membranes.

Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 636, article id 119612
Keywords [en]
MFI nanosheets, Zeolite, Mixed matrix membranes, Pebax, CO2/CH4 separation
National Category
Chemical Process Engineering
Research subject
Chemical Technology
Identifiers
URN: urn:nbn:se:ltu:diva-86337DOI: 10.1016/j.memsci.2021.119612ISI: 000681121500001Scopus ID: 2-s2.0-85109518619OAI: oai:DiVA.org:ltu-86337DiVA, id: diva2:1579904
Note

Validerad;2021;Nivå 2;2021-07-15 (beamah);

Forskningsfinansiär: National Natural Science Foundation of China (U20A20152, 21136008)

Available from: 2021-07-12 Created: 2021-07-12 Last updated: 2023-09-05Bibliographically approved

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Zhou, Ming

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