کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
221527 464260 2016 10 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Surface modification of mordenite in Nafion composite membrane for direct ethanol fuel cell and its characterizations: Effect of types of silane coupling agent
ترجمه فارسی عنوان
اصلاح سطح موردنیت در غشاء و فرآیندهای غشایی کامپوزیت Nafion به برای سلول سوختی اتانول مستقیم و خصوصیات آن: اثر نوع عامل اتصال سیلان
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کلمات کلیدی
موردنیت / Nafion به غشاء و فرآیندهای غشایی کامپوزیت؛ درمان سطح سیلان؛ نفوذپذیری اتانول؛ سازگاری؛ سلول سوختی اتانول مستقیم
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Silane treated mordenite composite membrane was used for DEFC.
• Four types of silane coupling agents were treated on MOR surface.
• Sulfhydryl group in MPTES provided sulfonic group for enhance proton conductivity.
• MOR-MPTES/Nafion membrane had the highest selectivity at all temperature.

Mordenite (MOR) has been used to solve the alcohol crossover in direct ethanol fuel cells. However, the lack of compatibility has been a problem. This paper shows the compatibility improvement of MOR in a Nafion composite membrane for use in a fuel cell using four types of silane coupling agents: gamma-glycidoxypropyltrimethoxysilane (GMPTS), (3-mercaptopropyl)trimethoxysilane (MPTS), (3-mercaptopropyl)triethoxysilane (MPTES) and (3-mercaptopropyl)methyl-dimethoxysilane (MPDMS). The coupling agents were used to treat the MOR surface before mixing with Nafion. Each type of silane was treated carefully and differently, depending on its structure. Their characterizations were also described. The results showed that better compatibility and a noticeable reduction in ethanol permeability were achieved when using all silane-treated MOR in the composite. It was found that the Nafion/MOR-MPTES membrane had the highest proton conductivity at all temperature ranges from 30 to 70 °C. This was due to the fact that the sulfhydryl (SH) functional group in MPTES provided the sulfonic group in its structure after the oxidation in the surface treatment process. These sulfonic groups at the MOR surface facilitated proton transport and improved the selectivity of the membrane.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Chemical Engineering - Volume 4, Issue 3, September 2016, Pages 2637–2646
نویسندگان
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