نتایج جستجو برای: methanol fuel

تعداد نتایج: 97647  

Proton exchange membranes (PEM) for a direct methanol fuel cell (DMFC) have main drawbacks which are methanol permeability, reduced proton conductivity and the cost of the membrane. This paper reviews different polymeric materials such as fluorinated, non-fluorinated, acid-base complex, and composite membranes for DMFC. Currently, nonfluorinated membranes gain a lot of atte...

2012
A. B. M. S. Hossain A. N. Boyce A. Salleh S. Chandran

The use of alternative fuels in order to reduce the environmental impacts of diesel emissions has been extensively investigated. Trends in the regional use of biomass-derived fuels, such as alcohols, biodiesel and agricultural residues as a proposed control initiative against elevated carbon monoxide levels in urban areas have expanded to a global scale. Waste cooking oil is considered as the m...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1381

مطالعات و بررسی های انجام گرفته نشان می دهد ترکیبات بودار موجود در ‏‎fuel oil‎‏ عمدتا ترکیبات سولفوردار سخت مثل تیوفن، دی متیل بنزوتیوفن و ... بوده و روشهای بوزدایی همچون استخراج با حلالهای اسیدی و بازی ، رقیق کاری با گازولین ، ماسکینگ با بوتیل استات نتایج چندان مطلوبی در بوزدایی از آن نشان نمی دهند.همچنین روش جذب سطحی برای بوزدایی ‏‎fuel oil‎‏ تنها با استفاده از جاذب هایی همچون بنتونیت و توفیت...

2011
Qing Li Gang Wu Christina M. Johnston Piotr Zelenay

For the last decade, dimethyl ether (DME) has been considered a promising alternative fuel for direct fuel cells because of several advantages over methanol. In this work, PtRu catalysts with a wide range of Pt-to-Ru ratios were screened for the direct DME fuel cell (DDMEFC) performance for the first time. Overall, Pt50Ru50 performs best in the high and middle voltage ranges, whereas Pt80Ru20 p...

2015
Ok-Hee Kim Yong-Hun Cho Dong Young Chung Min Jeong Kim Ji Mun Yoo Ji Eun Park Heeman Choe Yung-Eun Sung

Although numerous reports on nonprecious metal catalysts for replacing expensive Pt-based catalysts have been published, few of these studies have demonstrated their practical application in fuel cells. In this work, we report graphitic carbon nitride and carbon nanofiber hybrid materials synthesized by a facile and gram-scale method via liquid-based reactions, without the use of toxic material...

2009
Rohit Pathak Satyadhar Joshi Pawan Kotak

We have proposed a unified approach to the modeling and study of developments in the field of MEMS and Nanotechnology and its application in futuristic Nano-enabled Cells. We have proposed a novel to approach reliability of MEMS enabled fuel cells. We know that reliability and accurate prediction of properties in nano domains remains a major challenge where still theories are being developed to...

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