Silicone-coated polymeric membrane for separation of hydrocarbons and nitrogen at sub-ambient temperatures

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DOIResolve DOI: http://doi.org/10.1016/j.memsci.2006.10.007
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TypeArticle
Journal titleJournal of Membrane Science
Volume286
Issue1-2
Pages285292; # of pages: 8
SubjectSub-ambient temperature; PDMS; Membrane; Hydrocarbons; Nitrogen
AbstractPermeation performances of pure and mixed nitrogen, ethylene, ethane, propylene and propane were investigated using a polydimethylsiloxane (PDMS) coated polysulfone composite membrane in the temperature range of −20 to 40 °C. The permeances and selectivities strongly depended on the temperature and feed composition at a constant pressure. Propylene and propane plasticized the PDMS coating with decreasing temperature and increasing hydrocarbon concentrations, which led to significantly high permeances for all mixed hydrocarbons. It also caused positive coupling effects for ethane, ethylene and nitrogen in the presence of propylene and propane. Moreover, pure nitrogen permeances or nitrogen permeance as a mixture component always decreased considerably by lowering the temperature. Consequently, all selectivities for the hydrocarbons to nitrogen increased significantly with the decrease of temperature and increase of total hydrocarbon concentration in feed. A systematic analysis of apparent activation energies to verify the experimental results was also presented.
Publication date
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology; National Research Council Canada
Peer reviewedNo
NRC number49106
NPARC number12740537
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Record identifier8a8f2d94-2ecd-413c-bd5b-64c5ebcf7197
Record created2009-10-28
Record modified2016-05-09
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