TY - JOUR
T1 - Gas solubility, diffusivity and permeability in poly(ethylene oxide)
AU - Lin, H.
AU - Freeman, B. D.
N1 - Funding Information:
The authors gratefully acknowledge partial support of this project by the United States Department of Energy under grant number DE-FG02-99ER14991. This research work was also partially supported with the funding from the United States Department of Energy’s National Energy Technology Laboratory under a subcontract from Research Triangle Institute through their Prime Contract No.: DE-AC26-99FT40675.
PY - 2004/8/1
Y1 - 2004/8/1
N2 - The effect of pressure on the solubility, diffusivity, and permeability of He, H2, O2, N2, CO2, CH4, C2H4, C2H6, C3H 6 and C3H8 in poly(ethylene oxide) (PEO) is reported at 35°C. Additionally, the temperature dependence of permeability is reported. The effect of polar ether linkages in PEO on gas transport is illustrated by comparing transport properties in PEO with those in polyethylene (PE). For example, at 35°C and infinite dilution, semi-crystalline PEO exhibits CO2 permeability coefficient of 12 Barrers, and CO 2/H2 and CO2/N2 pure gas selectivities of 6.7 and 48, respectively. In contrast, at similar conditions, the permeability of PE to CO2 is 13 Barrers, but the CO 2/N2 selectivity is only 13. In addition to good separation properties for quadrupolar-nonpolar gas pairs, PEO also shows interestingly high selectivity for olefins over paraffins, which is ascribed to favorable interaction between the polar ether groups in PEO and olefins. For example, the infinite dilution permeability of PEO to propylene is 3.8 Barrers and pure gas propylene-propane selectivity is 2.7 at 35°C. At similar conditions, PE exhibits propylene-propane selectivity of only 1.4.
AB - The effect of pressure on the solubility, diffusivity, and permeability of He, H2, O2, N2, CO2, CH4, C2H4, C2H6, C3H 6 and C3H8 in poly(ethylene oxide) (PEO) is reported at 35°C. Additionally, the temperature dependence of permeability is reported. The effect of polar ether linkages in PEO on gas transport is illustrated by comparing transport properties in PEO with those in polyethylene (PE). For example, at 35°C and infinite dilution, semi-crystalline PEO exhibits CO2 permeability coefficient of 12 Barrers, and CO 2/H2 and CO2/N2 pure gas selectivities of 6.7 and 48, respectively. In contrast, at similar conditions, the permeability of PE to CO2 is 13 Barrers, but the CO 2/N2 selectivity is only 13. In addition to good separation properties for quadrupolar-nonpolar gas pairs, PEO also shows interestingly high selectivity for olefins over paraffins, which is ascribed to favorable interaction between the polar ether groups in PEO and olefins. For example, the infinite dilution permeability of PEO to propylene is 3.8 Barrers and pure gas propylene-propane selectivity is 2.7 at 35°C. At similar conditions, PE exhibits propylene-propane selectivity of only 1.4.
KW - Carbon dioxide
KW - Permeability
KW - Poly(ethylene oxide)
KW - Separation
KW - Solubility
UR - http://www.scopus.com/inward/record.url?scp=2942734984&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2003.08.031
DO - 10.1016/j.memsci.2003.08.031
M3 - Article
AN - SCOPUS:2942734984
SN - 0376-7388
VL - 239
SP - 105
EP - 117
JO - Journal of Membrane Science
JF - Journal of Membrane Science
IS - 1
ER -