TY - JOUR
T1 - Comparative assessment of hydrocarbon separation performance of bulky poly(urethane-urea)s toward rubbery membranes
AU - Fakhar, Afsaneh
AU - Sadeghi, Morteza
AU - Dinari, Mohammad
AU - Lammertink, Rob
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/2/1
Y1 - 2022/2/1
N2 - In the present study, two seriess of poly (urethane urea)s (PUUs) membranes containing aromatic and aliphatic side chains with different sizes were used for separation of higher hydrocarbons from methane. Fourier-transform infrared spectroscopy (FTIR), differential scanning calorimetery (DSC), fractional free volume (FFV) estimation, and gas permeation measurements (CH4, C2H6, C3H8) were done to characterize the membranes. Bulkier or longer side chains in aromatic and aliphatic substituted PUUs provided enhanced phase separation, lower glass transition temperature and higher gas permeability. Fractional free volume (FFV) as a significant factor controlling gas separation had a reverse trend in both series by increasing the size of side chains. The main findings confirmed the capability of higher phase separated PUUs for hydrocarbon separation. The highest permeability and selectivity was obtained by the longest side chain based PUU with propane permeability of 186 barrer and propane/methane selectivity of 6.51.
AB - In the present study, two seriess of poly (urethane urea)s (PUUs) membranes containing aromatic and aliphatic side chains with different sizes were used for separation of higher hydrocarbons from methane. Fourier-transform infrared spectroscopy (FTIR), differential scanning calorimetery (DSC), fractional free volume (FFV) estimation, and gas permeation measurements (CH4, C2H6, C3H8) were done to characterize the membranes. Bulkier or longer side chains in aromatic and aliphatic substituted PUUs provided enhanced phase separation, lower glass transition temperature and higher gas permeability. Fractional free volume (FFV) as a significant factor controlling gas separation had a reverse trend in both series by increasing the size of side chains. The main findings confirmed the capability of higher phase separated PUUs for hydrocarbon separation. The highest permeability and selectivity was obtained by the longest side chain based PUU with propane permeability of 186 barrer and propane/methane selectivity of 6.51.
KW - Aliphatic side chains
KW - Aromatic side chains
KW - Hydrocarbon separation
KW - Phase separation
KW - Polyurethane membranes
UR - http://www.scopus.com/inward/record.url?scp=85122105105&partnerID=8YFLogxK
U2 - 10.1016/j.jngse.2021.104356
DO - 10.1016/j.jngse.2021.104356
M3 - Article
AN - SCOPUS:85122105105
SN - 1875-5100
VL - 98
JO - Journal of Natural Gas Science & Engineering
JF - Journal of Natural Gas Science & Engineering
M1 - 104356
ER -