Pressurized PEM water electrolysis: Efficiency and gas crossover
Pressurized PEM water electrolysis: Efficiency and gas crossover
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DOI：
10.1016/j.ijhydene.2013.09.013
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发表时间：
2013-11-22
影响因子：
7.2
通讯作者：
Stolten, Detlef
中科院分区：
文献类型：
--
作者：
Schalenbach, Maximilian;Carmo, Marcelo;Stolten, Detlef
在这项研究中，模拟了聚合物电解质膜水电解过程中阴极和阳极压力对气体穿越的影响，并与差压和平衡压力操作下阳极氢含量的原位测量进行了比较。估计由于交叉、膜的欧姆损耗以及加压氢气和氧气释放导致的法拉第效率降低而导致的效率损失。因此，对电流密度、膜厚度、阳极和阴极压力、膜电导率和渗透率的相关依赖性进行了量化。此外，将加压电解与绝热和等温后续压缩进行比较，重点关注效率。这项研究的结果可用作强大的计算工具，根据操作压力优化膜厚度。版权所有 (C) 2013，Hydrogen Energy Publications, LLC。由爱思唯尔有限公司出版。保留所有权利。
In this study the influence of cathodic and anodic pressures during polymer electrolyte membrane water electrolysis on the gas crossover is simulated and compared to in-situ measurements of the anodic hydrogen content at differential and balanced pressure operation. The efficiency losses due to the reduced Faraday efficiency caused by crossover, ohmic loss of the membrane and pressurized hydrogen and oxygen evolution are estimated. Therefore, the correlated dependencies on the current density, membrane thickness, anodic and cathodic pressures, membrane conductivity and permeabilities are quantified. In addition, pressurized electrolysis is compared to adiabatic and isothermal subsequent compression in focus of efficiency. The outcome of this study can be utilized as a powerful computational tool to optimize the membrane thickness with respect to the operating pressures. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.