کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
628855 1455497 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Concentration of aqueous ethanol solutions by porous poly(dimethylsiloxane) membranes during temperature-difference controlling evapomeation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Concentration of aqueous ethanol solutions by porous poly(dimethylsiloxane) membranes during temperature-difference controlling evapomeation
چکیده انگلیسی

In order to obtain higher membrane performance in the concentration of aqueous ethanol solutions, a porous poly(dimethylsiloxane) (PDMS) membrane was applied to the temperature-difference controlling evapomeation (TDEV) method. Characteristics of permeation and separation for aqueous ethanol solutions through a porous PDMS membrane during TDEV under various conditions are discussed from the viewpoint of membrane structure. When the characteristics of permeation and separation of a porous PDMS membrane were compared with those of a dense PDMS membrane, the ethanol/water selectivity of these membranes was almost equal, but the permeation rate of a porous PDMS membrane was higher by three orders of magnitude than that of a dense PDMS membrane. When the temperature of the feed solution was kept constant at 40°C and the the temperature of the membrane surroundings was changed in TDEV, with dropping temperature of the membrane surroundings the permeation rate decreased but the ethanol/water selectivity increased for an aqueous solution of 10 wt% ethanol through a porous PDMS membrane.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 193, Issues 1–3, 10 May 2006, Pages 335-343