کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9684643 | 1456206 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of equivalent weight, temperature, cationic forms, sorbates, and nanoinorganic additives on the sorption behavior of Nafion®
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
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چکیده انگلیسی
A novel experimental technique, namely tapered element oscillating microbalance (TEOM) is utilized to study the effect of equivalent weights (960-1200), temperature (30-90 °C), various cationic forms (H+, Li+, Na+, K+ and Cs+), sorbates (water, methanol, ethanol and propanol), and inorganic additives on sorption behavior of Nafion® membrane. It is observed that water sorption increases with a decrease in EW and an increase in the sorption temperature. This is due to the increase in acid sites for sorption and a decrease in the Young's modulus of the membrane with the increase in temperature. Further, sorption decreases with the increase in size of the counter ion due to a corresponding decrease in ion hydration capacity due to a decrease in the ionization equilibrium constant constant. Also, it is observed that the incorporation of acidic inorganic additives (ZrO2, TiO2 and SiO2) via sol gel methods provides higher water sorption amount at 90 °C, which is crucial for higher temperature operations of fuel cells.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 264, Issues 1â2, 1 November 2005, Pages 167-175
Journal: Journal of Membrane Science - Volume 264, Issues 1â2, 1 November 2005, Pages 167-175
نویسندگان
Nikhil H. Jalani, Ravindra Datta,