Crosslinked copolymers (PEGDA-co-PEGMEA) prepared by photopolymerizing mixtures of poly(ethylene glycol) diacrylate (PEGDA) and poly(ethylene glycol) methyl ether acrylate (PEGMEA) were presented. These materials exhibited very high CO2 permeability and high CO2/H2 pure gas selectivity. Mixed gas CO2/H2 separation performance in these copolymers was evaluated. CO2 permeability increased with increasing CO2 partial pressure because of plasticization of the polymer chains by CO2. The increase became more significant at lower temperatures because CO2 sorption increased with decreasing temperature. The pure gas and mixture CO2 permeability fell on the same trend line, suggesting that the presence of H2 had a negligible effect on CO2 permeability. H2 permeability increased with increasing CO2 partial pressure. Lower temperature improved both CO2 permeability and CO2/H2 mixed gas selectivity. Decreasing temperature improved CO2/H2 selectivity in the nanocomposite containing 44 wt % MgO and the balance PEGDA. Mixed gas CO2 permeability in the nanocomposite was compared with pure gas CO2 permeability in the pure polymer at -20°C. This comparison was reasonable because CO2 permeability values for various compositions fall on the same trend line. The addition of MgO nanoparticles improved CO2 permeability. This is an abstract of a paper presented in the ACS Fuel Chemistry Meeting Fall 2005 (Washington, DC Fall 2005).
|Number of pages||3|
|Journal||ACS Division of Fuel Chemistry, Preprints|
|State||Published - 2005|
ASJC Scopus subject areas
- Energy (all)