Permeation of ethylene and ethane through sulfonated polysulfones and sulfonated poly(phenylene oxide) ion exchange membranes
- Univ. of Massachusetts, Lowell, MA (United States)
- Innovative Membrane Systems, Inc., Norwood, MA (United States)
- DePaul Univ., Chicago, IL (United States)
Permeation of ethylene and ethane is sulfonated poly(phenylene oxide), sulfonated bisphenol A polyarylethersulfone and sulfonated hexafluorobisphenol A polyarylethersulfone (6F-SPS) exchanged with Ag{sup +} ions were measured as a function of degree of sulfonation, temperature and trans membrane differential pressure. The data were compared with the permeation results for these membranes in acid form and alkaline metal salt form. Membranes exchanged with Ag{sup +} ions displayed enhanced etylene permeability and ethylene-ethane separation factors. The enhancement in transport of ethylene in ion exchange membranes is apparently related to an increase in ethylene solubility affected by complexation of ethylene with immobilized Ag{sup +} ions. A substantial increase in ethylene permeation rate and separation factor was observed when the feed gas was saturated with water vapors. Enhanced permeation/separation were attributed to an increase in the mobility of silver ions in water plasticized membranes. Membranes plasticized with glycerol exhibited high ethylene permeation rate and ethylene/ethane separation factors in dry feed gas streams that were comparable with permeation rates in water plasticized membranes.
- OSTI ID:
- 141891
- Report Number(s):
- CONF-930304--
- Country of Publication:
- United States
- Language:
- English
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