期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 18, 页码 10892-10902出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.12.188
关键词
Polymer electrolyte fuel cell; Fuel crossover; Oxymethylene dimethyl ether; Diffusion; Swelling
资金
- research foundation for the electrotechnology of Chubu
This study investigated the fuel crossover characteristics of oxymethylene dimethyl ether (OME) in polymer electrolyte fuel cells, and found that the fully hydrolyzed OME (h-OME) has a lower fuel crossover rate compared to direct methanol fuel cells (DMFC), leading to higher cell performance at high fuel concentrations. The effective diffusion coefficient of h-OME in the membrane decreased with increased fuel concentration, resulting in the low fuel crossover rate at high h-OME concentrations.
Fuel crossover is a crucial issue for polymer electrolyte fuel cells (PEFCs) supplied directly with liquid fuels. Therefore, finding a type of fuel with a low fuel crossover rate is required. In this study, we investigated fuel crossover characteristics for oxymethylene dimethyl ether (OME), which has attracted attention for use in engines, and compared it with methanol. Cell performance tests and exhaust gas analyses showed that fully hydrolyzed OME (h-OME), which consisted of methanol and formaldehyde, yields high cell performance at high fuel concentrations, due to the low fuel crossover rate, compared with a direct methanol fuel cell (DMFC). To clarify a factor suppressing fuel crossover, h-OME's effective diffusion coefficient in the membrane was measured. Although an effective diffusion coefficient for fuels like methanol commonly increases with increased fuel's concentration, h-OME's effective diffusion coefficient decreased with increased fuel concentration, leading to a low fuel crossover rate at high h-OME concentrations. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据