Optimizing membranes structures for CO2 separations

Victor A. Kusuma, Grant Offord, Benny D. Freeman

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review


Polymers containing ethylene oxide units have attracted significant scientific interest since ether oxygen linkages lead to flexible polymer chains and specific interactions with metal ions, polar molecules such as H2O and H2S, and quadrupolar molecules such as CO2. This presentation discusses research to design rubbery membrane materials for the removal of acid gases such as CO2 and H2S from natural gas (mainly CH4) using highly branched, crosslinked poly(ethylene oxide) (PEO)-based hydrogels. Unlike conventional size-sieving membrane materials, which achieve high permeability selectivity mainly via high diffusivity selectivity, these polar rubbery membrane materials exhibit high CO2 permeability, high CO2/CH4 mixed-gas selectivity, and excellent stability to contaminants in natural gas due to high gas diffusivity and high CO2/CH4 solubility selectivity. Their performance is also of interest for hydrogen purification, and CO2/H2 separation data are presented to complement the CO2/CH4 data.

Original languageEnglish
Title of host publicationAmerican Chemical Society - 235th National Meeting, Abstracts of Scientific Papers
PublisherAmerican Chemical Society
ISBN (Print)9780841269859
Publication statusPublished - 2008
Externally publishedYes
EventNational Meeting of the American Chemical Society 2008 - New Orleans, United States of America
Duration: 6 Apr 200810 Apr 2008
Conference number: 235th

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727


ConferenceNational Meeting of the American Chemical Society 2008
Abbreviated titleACS 2008
CountryUnited States of America
CityNew Orleans

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