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- W2099060814 abstract "The permeation and separation of carbon dioxide through a water-swollen chitosan membrane was studied. A chitosan membrane was swollen by water vapor contained in a feed gas and, thus treated, exhibited a large gas permeability. Carbon dioxide preferentially permeated through the swollen chitosan membrane with a permeability of 2.5·10−8 cm3 (STP) cm(s cm2 cmHg)−1 and a CO2/N2 separation factor of 70 at room temperature. This separation performance for CO2 resulted from the basic properties of the chitosan amino groups. The membrane preparation conditions, such as acetic acid concentration of the casting solution, affected the membrane permeation rate. The effect of the operation temperature was also measured. To increase the separation performance of the membrane, several methods of membrane treatment and operation were evaluated. In der vorliegenden Studie wurde die Permeation und Separation von Kohlendioxid durch eine wassergequollene Chitosanmembran untersucht. Die Chitosanmembran wurde durch in einem Trägergas enthaltenen Wasserdampf gequollen und zeigte nach dieser Behandlung eine hohe Gaspermeabilität. Bei Raumtemperatur durchdrang vorzugsweise Kohlendioxid die gequollene Chitosanmembran mit einer Permeabilität von 2,5·10−8 cm3 (STP) cm(s cm2 cmHg)−1 und einem CO2/N2 Trennfaktor von 70.Diese Trennleistung für Kohlendioxid wird durch die basischen Eigenschaften der Aminogruppen den Chitosanmolekülen hervorgerufen. Die Membranherstellungsbedingungen, wie zum Beispiel die Essigsäurekonzentration der Gießlösung, beeinflußten die Permeationsgeschwindigkeit. Der Einfluß der Arbeitstemperatur wurde ebenfalls untersucht. Um die Trennleistung der Membran zu erhöhen, wurden verschiedene Methoden der Membranbehandlung und Arbeitsbedingungen untersucht." @default.
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- W2099060814 doi "https://doi.org/10.1002/apmc.1997.052480105" @default.
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