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dc.contributor.authorLee, Jong Suk
dc.contributor.authorMadden, William
dc.contributor.authorKoros, William J.
dc.date.accessioned2016-02-25T12:42:42Z
dc.date.available2016-02-25T12:42:42Z
dc.date.issued2010-03-15
dc.identifier.citationLee JS, Madden W, Koros WJ (2010) Antiplasticization and plasticization of Matrimid® asymmetric hollow fiber membranes—Part A. Experimental. Journal of Membrane Science 350: 232–241. Available: http://dx.doi.org/10.1016/j.memsci.2009.12.033.
dc.identifier.issn0376-7388
dc.identifier.doi10.1016/j.memsci.2009.12.033
dc.identifier.urihttp://hdl.handle.net/10754/597592
dc.description.abstractThe complex effects of highly sorbing feed gas contaminants such as toluene and n-heptane on performance of both annealed and non-annealed Matrimid® asymmetric fibers relevant to CO2/CH4 separation are reported. Membrane performance was quantified both during contaminant exposure and after removal of the contaminant from the feed stream. Exposure to either toluene or n-heptane during permeation reduces carbon dioxide permeance and the carbon dioxide/methane selectivity in non-annealed fibers. After exchange with a contaminant-free feed containing only CO2 and CH4 mixed gas, the carbon dioxide permeance and carbon dioxide/methane selectivity were affected, indicating a glassy state conditioning effect due to the prior contaminant exposure. Interestingly, the conditioning effect after simultaneous exposure to toluene and n-heptane (284 ppm toluene and 504 ppm n-heptane) was less than the conditioning observed for either toluene (293 ppm) or n-heptane (505 ppm) individually. Sub-Tg annealing reduced carbon dioxide permeance during actual contaminant exposure more severely than in non-annealed fibers. On the other hand, except for exposure to the highest n-heptane contaminant feed (2003 ppm), annealing significantly reduced the post-exposure conditioning observed in carbon dioxide permeance and carbon dioxide/methane selectivity. It appears that annealing allows the consolidation of segmental packing which stabilized the glassy matrix against swelling. At sufficiently high activities of even a relatively non-interacting penetrant like n-heptane, the annealing-induced stabilization can be reversed. © 2010 Elsevier B.V. All rights reserved.
dc.description.sponsorshipThe authors would like to acknowledge financial support from The Coca Cola Company, Air Liqude, and Award no. KUS-I1-011-21 made by King Abdullah University of Science and Technology (KAUST).
dc.publisherElsevier BV
dc.subjectMatrimid® asymmetric fibers
dc.subjectn-Heptane
dc.subjectToluene
dc.titleAntiplasticization and plasticization of Matrimid® asymmetric hollow fiber membranes—Part A. Experimental
dc.typeArticle
dc.identifier.journalJournal of Membrane Science
dc.contributor.institutionGeorgia Institute of Technology, Atlanta, United States
kaust.grant.numberKUS-I1-011-21


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