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- 저자 : Ehsan Ghasemi Estahbanati (검색결과 1 건)
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Ehsan Ghasemi Estahbanati,Mohammad Reza Omidkhah,Abtin Ebadi Amooghin 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.51 No.-
In this study, the goal is to incorporate superior features of the Pebax 1657 copolymer, such as highmechanical resistance and exceptional gas permeability especially for polar gases, with the affinity of the1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]) ionic liquid to CO2 gas, which results inincreasing the permselectivity of the membranes for CO2/light gases separation. Generally, the CO2solubility in ILs increases with pressure increment, and temperature decrement. Therefore, gaspermeation results of prepared membranes were obtained at temperature of 35 C and feed pressurerange 2–10 bar. SEM, ATR and DSC analysis were carried out on different compositions of membranes andthe results showed that adding the IL to the polymer make membranes more amorphous and lesscrystalline which lead to increase permeability for all tested gases. In addition, due to the high affinity ofCO2 in both polymer and IL, both CO2 permeability and selectivity increased simultaneously withincreasing IL content. This is confirmed by gas permeation results, where at 35 C and 10 bar, the CO2permeability increased from 110 Barrer for neat Pebax to 190 Barrer in the blended membrane containing50 wt.% IL (about 73%). The related CO2/CH4 and CO2/N2 selectivities were increased from 20.8 to 24.4(about 17%) and from 78.6 to 105.6 (about 34%), respectively. Thus, these types of membranes arepromising to be utilized in gas separation processes in industries for CO2 separation in order to postponethe global warming, which is nowadays the biggest threat to the universe.
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