Show simple item record

dc.contributor.authorMukaddam, Mohsin Ahmed
dc.contributor.authorLitwiller, Eric
dc.contributor.authorPinnau, Ingo
dc.date.accessioned2016-02-15T06:10:40Z
dc.date.available2016-02-15T06:10:40Z
dc.date.issued2015-12-22
dc.identifier.citationGas Sorption, Diffusion, and Permeation in Nafion 2016, 49 (1):280 Macromolecules
dc.identifier.issn0024-9297
dc.identifier.issn1520-5835
dc.identifier.doi10.1021/acs.macromol.5b02578
dc.identifier.urihttp://hdl.handle.net/10754/596253
dc.description.abstractThe gas permeability of dry Nafion films was determined at 2 atm and 35 °C for He, H2, N2, O2, CO2, CH4, C2H6, and C3H8. In addition, gas sorption isotherms were determined by gravimetric and barometric techniques as a function of pressure up to 20 atm. Nafion exhibited linear sorption uptake for low-solubility gases, following Henry’s law, and convex behavior for highly sorbing condensable gases, indicating rubber-like behavior at 35 °C. XRD results demonstrated that Nafion contains bimodal amorphous chain domains with average d-spacing values of 2.3 and 5.3 Å. Only helium and hydrogen showed relatively high gas permeability of 37 and 7 barrers, respectively; all other gases exhibited low permeability that decreased significantly as penetrant size increased. Dry Nafion was characterized by extraordinarily high selectivities: He/H2 = 5.2, He/CH4 = 445, He/C2H6 = 1275, He/C3H8 = 7400, CO2/CH4 = 28, CO2/C2H6 = 79, CO2/C3H8 = 460, H2/CH4 = 84, H2/C2H6 = 241, and H2/C3H8 = 1400. These high selectivities could make Nafion a potential candidate membrane material for dry feeds for helium recovery and carbon dioxide separation from natural gas and removal of higher hydrocarbons from hydrogen-containing refinery gases.
dc.language.isoen
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acs.macromol.5b02578
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.macromol.5b02578.
dc.titleGas Sorption, Diffusion, and Permeation in Nafion
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentChemical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalMacromolecules
dc.eprint.versionPost-print
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personMukaddam, Mohsin Ahmed
kaust.personLitwiller, Eric
kaust.personPinnau, Ingo
refterms.dateFOA2016-12-22T00:00:00Z
dc.date.published-online2015-12-22
dc.date.published-print2016-01-12


Files in this item

Thumbnail
Name:
Final_Draft_MAM.R1.pdf
Size:
1.494Mb
Format:
PDF
Description:
Accepted Manuscript

This item appears in the following Collection(s)

Show simple item record