کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7731054 | 1497941 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Composite membranes for alkaline electrolysis based on polysulfone and mineral fillers
ترجمه فارسی عنوان
غشای کامپوزیتی برای الکترولیز قلیایی بر اساس پلی سولفون و پرکننده های معدنی
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کلمات کلیدی
الکترولیز قلیایی، جداساز گاز غشاء، چرخش فاز، باریت، مقاومت خلوص گاز،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
Mineral-based membranes for high temperature alkaline electrolysis were developed by a phase inversion process with polysulfone as binder. The long-term stability of new mineral fillers: wollastonite, forsterite and barite was assessed by 8000 h-long leaching experiments (5.5 M KOH, 85 °C) combined with thermodynamic modelling. Barite has released only 6.22 10-4 M of Ba ions into the electrolyte and was selected as promising filler material, due to its excellent stability. Barite-based membranes, prepared by the phase inversion process, were further studied. The resistivity of these membranes in 5.5 M KOH was investigated as a function of membrane thickness and total porosity, hydrodynamic porosity as well as gas purities determined by conducting electrolysis at ambient conditions. It was found that a dense top layer resulting from the phase inversion process, shows resistivity values up to 451.0 ± 22 Ω cm, which is two orders of magnitude higher than a porous bulk membrane microstructure (3.89 Ω cm). Developed membranes provided hydrogen purity of 99.83 at 200 mA cmâ2, which is comparable to previously used chrysotile membranes and higher than commercial state-of-the-art Zirfon 500utp membrane. These cost-effective polysulfone - barite membranes are promising candidates as asbestos replacement for commercial applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 291, 30 September 2015, Pages 163-172
Journal: Journal of Power Sources - Volume 291, 30 September 2015, Pages 163-172
نویسندگان
Dariusz Burnat, Meike Schlupp, Adrian Wichser, Barbara Lothenbach, Michal Gorbar, Andreas Züttel, Ulrich F. Vogt,