Description and characterization of an electrochemical hydrogen compressor/concentrator based on solid polymer electrolyte technology
Description and characterization of an electrochemical hydrogen compressor/concentrator based on solid polymer electrolyte technology
复制标题
DOI：
10.1016/j.ijhydene.2010.07.012
复制
发表时间：
2011-03-01
影响因子：
7.2
通讯作者：
Fateev, V. N.
中科院分区：
文献类型：
--
作者：
Grigoriev, S. A.;Shtatniy, I. G.;Fateev, V. N.
质子交换膜（PEM）技术通常用于制造水电解槽、H-2/O-2燃料电池和单元化再生燃料电池。它还可以用于开发电化学压缩机，用于浓缩和/或加压气态氢。本文报告的工作的目的是评估实验室规模（约10 N升/小时）单电池压缩机的主要操作特性。研究了各种操作参数（电流密度、电化学电池温度、氢气进料气体中的水蒸气分压、阳极气体组成等）对电解过程的影响。已被评估和讨论。结果表明，在压缩机的阳极氧化的氢的相对湿度应适应在操作过程中的电流密度，以避免传质限制或电极淹没。在0.2 A cm（-2）下，需要140 mV的电池电压以在一个步骤中将氢气从大气压压缩到48 bar，对应于约100 mV的能量消耗。0.3 kW h/Nm（3）.实验已经进行了高达130巴。建议将多台压缩机串联连接，以达到高于50 bar的输出压力。为了减少可能对压缩机的效率产生负面影响的气体交叉渗透效应，已经使用通过添加磷酸氧锆改性的Nafion膜进行了额外的实验。最后，还报告和讨论了与从H2-N2气体混合物中提取氢相关的数据。版权所有（C）2010，氢能出版有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
Proton-exchange membrane (PEM) technology is commonly used for manufacturing water electrolysers, H-2/O-2 fuel cells and unitized regenerative fuel cells. It can also be used to develop electrochemical compressors, for the purpose of concentrating and/or pressurizing gaseous hydrogen. The aim of the work reported here was to evaluate the main operating characteristics of a laboratory scale (approximate to 10 N liter/h) monocell compressor. The role of various operating parameters (current density, temperature of electrochemical cell, water vapor partial pressure in the hydrogen feed gas, anodic gas composition, etc.) has been evaluated and is discussed. It is shown that the relative humidity of hydrogen oxidized at the anode of the compressor should be adapted to the current density during operation to avoid mass transfer limitations or electrode flooding. A cell voltage of 140 mV is required at 0.2 A cm(-2) to compress hydrogen in one step from atmospheric pressure up to 48 bar, corresponding to an energy consumption of ca. 0.3 kW h/Nm(3). Experiments have been performed up to 130 bar. Series connection of several compressors is recommended to reach output pressures higher than 50 bar. To reduce gas cross-permeation effects which can negatively impact the efficiency of the compressor, additional experiments have been made using Nafion membrane modified by addition of zirconyl phosphate. Finally, data related to the extraction of hydrogen from H-2-N-2 gas mixtures are also reported and discussed. Copyright (C) 2010, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.