Reverse-selective polymeric membranes for hydrogen purification

Haiqing Lin, Benny D. Freeman, Lora Toy, Valeriy Bondar, Raghubir Gupta, Steven Pas, Anita Hill

Research output: Contribution to journalMeeting Abstractpeer-review


Polymeric membranes are used in many applications, including gas separations, due to inherently low energy requirements for molecular scale separations. Highly efficient membrane materials will be more permeable to large impurity molecules, CO 2, than to H 2 to produce purified H 2 at high pressure; this so-called reverse selective behavior is opposite to that exhibited by the vast majority of polymers. Polar, rubbery, branched hydrogels photopolymerized from poly(ethylene glycol) diacrylate and poly(ethylene glycol) methyl ether acrylate (PEGMEA) have outstanding performance for acid/polar gas removal from H 2. Introduction of methyl ether chain ends, i.e., PEGMEA, markedly improves CO 2/H 2 selectivity from 19 to 40 and CO 2 permeability from 6.6 to 52 Barrers at 253 K; these materials exhibit the best separation performance reported to date for solid non-facililated transport membranes. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA, 8/22-26/2004).

Original languageEnglish
Pages (from-to)POLY-447
JournalACS National Meeting Book of Abstracts
Issue number2
Publication statusPublished - 2004
Externally publishedYes
EventACS National Meeting 2004 - Anaheim, United States of America
Duration: 28 Mar 20041 Apr 2004
Conference number: 27th

Cite this