مقاله Fabrication and characterization of asymmetric polyetherimide hollow fiber membrane contactor for CO2 absorption با word
مقاله Fabrication and characterization of asymmetric polyetherimide hollow fiber membrane contactor for CO2 absorption با word دارای 8 صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است
فایل ورد مقاله Fabrication and characterization of asymmetric polyetherimide hollow fiber membrane contactor for CO2 absorption با word کاملا فرمت بندی و تنظیم شده در استاندارد دانشگاه و مراکز دولتی می باشد.
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توجه : در صورت مشاهده بهم ریختگی احتمالی در متون زیر ،دلیل ان کپی کردن این مطالب از داخل فایل ورد می باشد و در فایل اصلی مقاله Fabrication and characterization of asymmetric polyetherimide hollow fiber membrane contactor for CO2 absorption با word،به هیچ وجه بهم ریختگی وجود ندارد
بخشی از متن مقاله Fabrication and characterization of asymmetric polyetherimide hollow fiber membrane contactor for CO2 absorption با word :
سال انتشار: 1391
محل انتشار: دومین همایش ملی نفت، گاز و پتروشیمی
تعداد صفحات: 8
چکیده:
Porous asymmetric polyetherimide (PEI) hollow fiber membrane were fabricated via a phase-inversion method using methanol (0, 2 and 4 wt.%) as additive in the dope solution. An aqueous solution of 1-methyl-2-pyrrolidone (90 wt.%) was used as bore fluid to prevent forming inner dense skin layer. The precipitation rate of thepolymer dopes with the different amount of additive was studied using cloud point measurement. The effect of theadditive on the resulting membrane structure, surface porosity, pore size, critical water entry pressure, collapsing pressure and CO2 absorption performance by distilled water in a gas-liquid membrane contactor system were investigated. Cloud point diagrams indicated that the precipitation rate of the polymer dopes increased by increasing additive concentration in the spinning dope. Results of gas permeation tests showed that methanol with 2 wt.%provided the membranes with the larger pore size. The cross-section of the membranes was examined via a scanning electron microscopy. Methanol (2 wt%) in the spinning dope provided the membrane structure with a sublayer with finger-like macrovoids, originating from inner and outer surfaces of the hollow fiber and extending to the middle section of the hollow fiber wall, which resulted in a larger pore size and higher CO2 absorption rate than the other PEI hollow fiber membrane.
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