Title:
The Performance of Hollow Fiber Gas Separation Membranes in the Presence of an Aggressive Feed Stream

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dc.contributor.advisor Koros, William J.
dc.contributor.author Madden, William Clark en_US
dc.contributor.committeeMember Eckert, Charles A.
dc.contributor.committeeMember Clifford Henderson
dc.contributor.committeeMember Ludovice, Peter J.
dc.contributor.committeeMember Satish Kumar
dc.contributor.department Chemical Engineering en_US
dc.date.accessioned 2007-03-27T18:16:49Z
dc.date.available 2007-03-27T18:16:49Z
dc.date.issued 2005-11-16 en_US
dc.description.abstract Industrial utilization of polymeric gas separation membranes is predicted to increase significantly over the next 20 years. This growth will be driven by application of membrane based separations to increasingly aggressive feed streams. In this work, the performance of defect-free Matrimid asymmetric hollow fiber membranes in the presence of high pressure carbon dioxide and trace levels of toluene and n-heptane in the feed stream are studied. Specifically, this work shows a significant decrease in the carbon dioxide plasticization pressure and the carbon dioxide permeance prior to plasticization as a result of accelerated physical aging at ambient temperature. Interestingly, sub-Tg thermal annealing at 220 oC reverses the effects of physical aging by increasing the plasticization pressure and the carbon dioxide permeance prior to plasticization for a typical polyimide commonly used in membranes. The performance of Matrimid asymmetric hollow fiber membranes in feed streams contaminated with up to 1200 ppm toluene and 2000 ppm n-heptane is investigated. In the presence of both feed stream contaminants, the productivity and efficiency of the membrane are observed to significantly decrease in this work. These decreases in performance are shown to be the result of antiplasticization, and a free volume based model is developed to correlate the effect of feed stream contamination on membrane performance en_US
dc.description.degree Ph.D. en_US
dc.format.extent 2036998 bytes
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/14021
dc.language.iso en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Antiplasticization en_US
dc.subject Permeation en_US
dc.subject Membranes en_US
dc.subject Annealing en_US
dc.subject Plasticization en_US
dc.title The Performance of Hollow Fiber Gas Separation Membranes in the Presence of an Aggressive Feed Stream en_US
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.advisor Koros, William J.
local.contributor.corporatename School of Chemical and Biomolecular Engineering
local.contributor.corporatename College of Engineering
relation.isAdvisorOfPublication 0059291f-6b5a-4a6c-a661-eef665ac3a18
relation.isOrgUnitOfPublication 6cfa2dc6-c5bf-4f6b-99a2-57105d8f7a6f
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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