کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
636328 1456125 2010 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mixed matrix blend membranes of poly(vinyl alcohol)-poly(vinyl pyrrolidone) loaded with phosphomolybdic acid used in pervaporation dehydration of ethanol
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Mixed matrix blend membranes of poly(vinyl alcohol)-poly(vinyl pyrrolidone) loaded with phosphomolybdic acid used in pervaporation dehydration of ethanol
چکیده انگلیسی
Mixed matrix blend membranes of poly(vinyl alcohol)-poly(vinyl pyrrolidone) (PVA-PVP) loaded with 4, 8 and 12 wt.% of phosphomolybdic acid (PMA) were prepared and characterized by FTIR, XRD, SEM, DSC, dynamic mechanical testing analysis (DMTA) and contact angle measurements. The extent of PMA loaded in the membrane affected the PV performance during ethanol dehydration. Selectivity calculated from permeability ratio of two components of a membrane was higher for 4 wt.% PMA-loaded membrane than those of 8 and 12 wt.% loaded membranes. At the azeotropic mixture composition of 4% of water and remaining ethanol, the 4 wt.% PMA-loaded membrane gave a selectivity of 8206 and a flux of 3.75 g/m2 h kPa. Accordingly, this membrane was further investigated in detail to understand the effect of variations in feed water composition and temperature on its PV performance. Sorption and diffusion results in conjunction with PV data were analyzed in terms of modified Flory-Huggins theory for three-component system. Heat of sorption, calculated from Arrhenius relationship was negative, suggesting Langmuir mode of sorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 354, Issues 1–2, 15 May 2010, Pages 150-161
نویسندگان
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