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dc.contributor.authorLiu, Gongping
dc.contributor.authorLabreche, Ying
dc.contributor.authorChernikova, Valeriya
dc.contributor.authorShekhah, Osama
dc.contributor.authorZhang, Chen
dc.contributor.authorBelmabkhout, Youssef
dc.contributor.authorEddaoudi, Mohamed
dc.contributor.authorKoros, William J.
dc.date.accessioned2018-12-31T13:30:09Z
dc.date.available2018-12-31T13:30:09Z
dc.date.issued2018-08-22
dc.identifier.citationLiu G, Labreche Y, Chernikova V, Shekhah O, Zhang C, et al. (2018) Zeolite-like MOF nanocrystals incorporated 6FDA-polyimide mixed-matrix membranes for CO2/CH4 separation. Journal of Membrane Science 565: 186–193. Available: http://dx.doi.org/10.1016/j.memsci.2018.08.031.
dc.identifier.issn0376-7388
dc.identifier.doi10.1016/j.memsci.2018.08.031
dc.identifier.urihttp://hdl.handle.net/10754/630513
dc.description.abstractMOF mixed-matrix membranes (MMMs) are regarded as promising candidates for energy-efficient natural gas purification. This work reports the fabrication of high-performance 6FDA-polyimide MMMs, based on the incorporation of zeolite-like MOF (ZMOF) as fillers, and their associated permeation studies for CO2/CH4 separation. To eliminate micron-sized crystals, a facile repeating sedimentation approach was used to harvest nanocrystals from the as-synthesized bulk ZMOF crystalline powder material. This enables the deployment of ZMOF nanocrystals with relatively uniform dimension and morphology in the polymer matrix. Typical 6FDA-polyimides encompassing distinct diamine moieties (6FDA-DAM, 6FDA-DETDA-DABA or PDMC) were explored as polymer matrices to disclose the transport property matching the hosted ZMOF filler. Mixed-gas permeation measurements revealed that the incorporation of the ZMOF filler affords a concurrent enhancement of the CO2 permeability and the CO2/CH4 selectivity for the three tested 6FDA-polyimides. Particularly, the highly permeable 6FDA-DAM showed a considerably enhanced performance for CO2/CH4 that transcends the 2008 Robeson upper-bound. Detailed analysis of the sorption data and diffusion coefficients suggest that the enhanced transport property in the ZMOF-based MMM is plausibly attributed to the combination of the higher CO2 sorption capacity and selectivity, and favorable gas diffusivity via the CO2-philic framework of ZMOF in moderately confined pores.
dc.description.sponsorshipThe work was supported by KAUST CRG Research Grant URF/1/2222-01; W.K. acknowledges financial support from the Office of Basic Energy Science of the US Department of Energy (grant DE-FG02-04ER15510); Y.B., O.S., V.C and M.E. acknowledge the support from King Abdullah University of Science and Technology; and G.L. acknowledges the support from National Natural Science Foundation of China (Grant Nos.: 21776125, 21490585).
dc.publisherElsevier BV
dc.relation.urlhttps://www.sciencedirect.com/science/article/pii/S0376738818319914
dc.subjectZeolite-like MOF
dc.subjectPolyimide
dc.subjectMixed matrix membranes
dc.subjectCO2/CH4 separation
dc.titleZeolite-like MOF nanocrystals incorporated 6FDA-polyimide mixed-matrix membranes for CO2/CH4 separation
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentChemical Science Program
dc.contributor.departmentFunctional Materials Design, Discovery and Development (FMD3)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of Membrane Science
dc.contributor.institutionState Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
dc.contributor.institutionSchool of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Dr. NW, Atlanta, GA 30332, USA
kaust.personChernikova, Valeriya
kaust.personShekhah, Osama
kaust.personBelmabkhout, Youssef
kaust.personEddaoudi, Mohamed
kaust.grant.numberURF/1/2222-01
dc.date.published-online2018-08-22
dc.date.published-print2018-11


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