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Science. 2006 Feb 3;311(5761):639-42.

Plasticization-enhanced hydrogen purification using polymeric membranes.

Author information

1
Center for Energy and Environmental Resources and Department of Chemical Engineering, University of Texas, Austin, TX 78758, USA.

Abstract

Polymer membranes are attractive for molecular-scale separations such as hydrogen purification because of inherently low energy requirements. However, membrane materials with outstanding hydrogen separation performance in feed streams containing high-pressure carbon dioxide and impurities such as hydrogen sulfide and water are not available. We report highly permeable, reverse-selective membrane materials for hydrogen purification, as exemplified by molecularly engineered, highly branched, cross-linked poly(ethylene oxide). In contrast to the performance of conventional materials, we demonstrate that plasticization can be harnessed to improve separation performance.

PMID:
16456074
DOI:
10.1126/science.1118079
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