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dc.contributor.authorMa, Xiaohua
dc.contributor.authorSwaidan, Raja
dc.contributor.authorTeng, Baiyang
dc.contributor.authorTan, Hua
dc.contributor.authorSalinas, Octavio
dc.contributor.authorLitwiller, Eric
dc.contributor.authorHan, Yu
dc.contributor.authorPinnau, Ingo
dc.date.accessioned2015-08-03T11:18:27Z
dc.date.available2015-08-03T11:18:27Z
dc.date.issued2013-10
dc.identifier.issn00086223
dc.identifier.doi10.1016/j.carbon.2013.05.057
dc.identifier.urihttp://hdl.handle.net/10754/562993
dc.description.abstractWe report the physical characteristics and gas transport properties for a series of pyrolyzed membranes derived from an intrinsically microporous polyimide containing spiro-centers (PIM-6FDA-OH) by step-wise heat treatment to 440, 530, 600, 630 and 800 C, respectively. At 440 C, the PIM-6FDA-OH was converted to a polybenzoxazole and exhibited a 3-fold increase in CO2 permeability (from 251 to 683 Barrer) with a 50% reduction in selectivity over CH4 (from 28 to 14). At 530 C, a distinct intermediate amorphous carbon structure with superior gas separation properties was formed. A 56% increase in CO2-probed surface area accompanied a 16-fold increase in CO2 permeability (4110 Barrer) over the pristine polymer. The graphitic carbon membrane, obtained by heat treatment at 600 C, exhibited excellent gas separation properties, including a remarkable CO2 permeability of 5040 Barrer with a high selectivity over CH4 of 38. Above 600 C, the strong emergence of ultramicroporosity (<7 Å) as evidenced by WAXD and CO2 adsorption studies elicits a prominent molecular sieving effect, yielding gas separation performance well above the permeability-selectivity trade-off curves of polymeric membranes. © 2013 Elsevier Ltd. All rights reserved.
dc.description.sponsorshipThis research was supported by King Abdullah University of Science and Technology baseline funding for Yu Han and Ingo Pinnau.
dc.publisherElsevier BV
dc.titleCarbon molecular sieve gas separation membranes based on an intrinsically microporous polyimide precursor
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentChemical Science Program
dc.contributor.departmentChemical and Biological Engineering Program
dc.contributor.departmentComputational Bioscience Research Center (CBRC)
dc.contributor.departmentNanostructured Functional Materials (NFM) laboratory
dc.identifier.journalCarbon
kaust.personMa, Xiaohua
kaust.personSwaidan, Raja
kaust.personTeng, Baiyang
kaust.personTan, Hua
kaust.personSalinas, Octavio
kaust.personLitwiller, Eric
kaust.personHan, Yu
kaust.personPinnau, Ingo


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