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گواهی نمایه سازی مقاله Pervaporation separation of water/isopropanol mixtures with poly(vinyl alcohol) membranes crosslinked with fumaric acid :Effect of crosslinking time on the mechanical and separation properties

عنوان مقاله: Pervaporation separation of water/isopropanol mixtures with poly(vinyl alcohol) membranes crosslinked with fumaric acid :Effect of crosslinking time on the mechanical and separation properties
شناسه (COI) مقاله: ICHEC07_134
منتشر شده در هفتمین کنگره ملی مهندسی شیمی در سال ۱۳۹۰
مشخصات نویسندگان مقاله:

Maryam Heydari - Department of Chemical Engineering, Isfahan University of Technology,Iran
Ahmad Moheb - Department of Chemical Engineering, Isfahan University of Technology,Iran

خلاصه مقاله:
Cross-linked Poly (vinyl alcohol) membranes were prepared by using fumaric acid as the crosslinking agent and the effects of cross-linking time on the mechanical properties and membraneperformance in terms of flux and selectivity were investigated. The crosslinking time varied between 10min to 60min .The characteristics of the membranes were determined by Fourier transform infrared (FT-IR) and tensile tests. FT-IR results proved that by increasing the crosslinkingtime more ester groups were formed in the cross-linked membranes. Also, An initial increase was seen for yield stress of the membrane cross-linked for 10 minutes, but further increase in the cross-linking time caused a reduction in this parameter. The effect of feedtemperature and concentration on pervaporation dehydration of water/isopropanol(IPA) were studied for all of the developed membranes.Poly(vinyl alcohol) membranes were crosslinked for60minutes showed the highest selectivity of 1492. The temperature dependency of flux was investigated by using Arrhenius relationship and activation energy calculated for total permeation flux(Ep), water flux(Epw) and isopropanol(EpIPA). The lower value of Epw in comparison with EpIPA indicates that the developed membranes have excellent dehydration performance.

کلمات کلیدی:
Cross-linking time; Poly (vinyl alcohol); Pervaporation; Mechanical property

صفحه اختصاصی مقاله و دریافت فایل کامل: https://www.civilica.com/Paper-ICHEC07-ICHEC07_134.html