Cross-Linkable Polyimide Membranes for Improved Plasticization Resistance and Permselectivity in Sour Gas Separations

Handle URI:
http://hdl.handle.net/10754/597898
Title:
Cross-Linkable Polyimide Membranes for Improved Plasticization Resistance and Permselectivity in Sour Gas Separations
Authors:
Kraftschik, Brian; Koros, William J.
Abstract:
A series of cross-linkable membrane materials based on the 6FDA-DAM:DABA (3:2) polyimide backbone were synthesized for improved sour gas separation performance, in terms of both membrane stability and permselectivity. Short-chain poly(ethylene glycol) (PEG) molecules were used as cross-linking agents in an esterification-based cross-linking reaction. Pure and mixed gas permeation and pure gas sorption experiments were performed on dense films of these materials. Compared to unmodified 6FDA-DAM:DABA (3:2), higher sour gas permselectivity and membrane stability were achieved under aggressive feed conditions. H2S-induced plasticization was not evident until pure H2S feed pressures greater than approximately 6-8 bar. Pure CO 2-induced plasticization only occurred at feed pressures greater than about 25 bar. Under mixed gas feed conditions with 20% H2S, 20% CO2, and 60% CH4 at 35 C, attractive selectivities above 22 and 27 for H2S/CH4 and CO2/CH4, respectively, were observed for a feed pressure of 62 bar with both triethylene glycol and tetraethylene glycol cross-linking agents. © 2013 American Chemical Society.
Citation:
Kraftschik B, Koros WJ (2013) Cross-Linkable Polyimide Membranes for Improved Plasticization Resistance and Permselectivity in Sour Gas Separations. Macromolecules 46: 6908–6921. Available: http://dx.doi.org/10.1021/ma401542j.
Publisher:
American Chemical Society (ACS)
Journal:
Macromolecules
Issue Date:
10-Sep-2013
DOI:
10.1021/ma401542j
Type:
Article
ISSN:
0024-9297; 1520-5835
Sponsors:
The authors acknowledge the King Abdullah University of Science and Technology (KAUST) for generously funding this work.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorKraftschik, Brianen
dc.contributor.authorKoros, William J.en
dc.date.accessioned2016-02-25T12:58:33Zen
dc.date.available2016-02-25T12:58:33Zen
dc.date.issued2013-09-10en
dc.identifier.citationKraftschik B, Koros WJ (2013) Cross-Linkable Polyimide Membranes for Improved Plasticization Resistance and Permselectivity in Sour Gas Separations. Macromolecules 46: 6908–6921. Available: http://dx.doi.org/10.1021/ma401542j.en
dc.identifier.issn0024-9297en
dc.identifier.issn1520-5835en
dc.identifier.doi10.1021/ma401542jen
dc.identifier.urihttp://hdl.handle.net/10754/597898en
dc.description.abstractA series of cross-linkable membrane materials based on the 6FDA-DAM:DABA (3:2) polyimide backbone were synthesized for improved sour gas separation performance, in terms of both membrane stability and permselectivity. Short-chain poly(ethylene glycol) (PEG) molecules were used as cross-linking agents in an esterification-based cross-linking reaction. Pure and mixed gas permeation and pure gas sorption experiments were performed on dense films of these materials. Compared to unmodified 6FDA-DAM:DABA (3:2), higher sour gas permselectivity and membrane stability were achieved under aggressive feed conditions. H2S-induced plasticization was not evident until pure H2S feed pressures greater than approximately 6-8 bar. Pure CO 2-induced plasticization only occurred at feed pressures greater than about 25 bar. Under mixed gas feed conditions with 20% H2S, 20% CO2, and 60% CH4 at 35 C, attractive selectivities above 22 and 27 for H2S/CH4 and CO2/CH4, respectively, were observed for a feed pressure of 62 bar with both triethylene glycol and tetraethylene glycol cross-linking agents. © 2013 American Chemical Society.en
dc.description.sponsorshipThe authors acknowledge the King Abdullah University of Science and Technology (KAUST) for generously funding this work.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleCross-Linkable Polyimide Membranes for Improved Plasticization Resistance and Permselectivity in Sour Gas Separationsen
dc.typeArticleen
dc.identifier.journalMacromoleculesen
dc.contributor.institutionGeorgia Institute of Technology, Atlanta, United Statesen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.