کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
626811 1455450 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Gas and water vapor permeation in a short-side-chain PFSI membrane
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Gas and water vapor permeation in a short-side-chain PFSI membrane
چکیده انگلیسی

The gas and vapor transport into films of Hyflon® Ion H, a short-side-chain perfluorosulfonic acid ionomeric (PFSI) membrane, suitable for use in proton exchange membrane fuel cells (PEMFC), has been studied at various temperatures (35°C, 50°C, and 65°C). The permeability and diffusivity values of He, N2, and O2 show an Arrhenius type dependence on temperature in the range inspected. Pure water vapor permeation was studied at 65°C, at low/medium activity values. The determination of water transport parameters has been performed by solving numerically the water mass balance with a variable diffusion coefficient and accounting for a water immobilization reaction onto the hydrophilic sites of the matrix. The boundary conditions vary in time according to the mass balance on the penetrant volume. The solution allows to represent closely the experimental permeation behavior in all its stages.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 240, Issues 1–3, 15 May 2009, Pages 341-346