摘要
设计构建了用于质子交换膜燃料电池汽车(FCV)氢气痕量杂质的模块化FTIR分析表征平台,开发了适用于氢气痕量杂质的分析方法,无需处理一次进样,能够同时快速测定HCOOH、CO、CO_(2)、NH_(3)、H_(2)O、CH_(4)、C_(2)H_(4)、C_(2)H_(6)、HCHO等多种痕量级别杂质。考察了各含氢杂质分析的影响因素,精选了杂质物种定性区域,优化了定量方法,提出了实用性强的定量检出限,在降低了背景气和空白气纯度的要求也能确保限值浓度准确测定。九种杂质的计算方法检出限达到ASTM D7653-18参考值,其定量限也均低于ISO 14687:2019相应的限值,定量线性范围约2个数量级,相关系数均大于0.999,准确度和精密度均不高于10%,通过ISO 21087:2019规定的方法适用性验证规则,满足ISO 14687:19相应的质控标准。根据不同场景需求,样品模块、气体净化控制模块、配气模块、红外分析模块和尾气处理模块可以有机结合并具有良好的实用性和扩展性,尾气处理后氢气浓度可降至100μmol·mol^(-1)以下排放,满足安全绿色环保的要求。与实验室其他参考方法测定值有较好的一致性,并已在FCV氢气工业生产样品质量检测中得到应用,它将从实验室离线方法逐步发展成为适用于工业不同场景的在线方法,这对燃料级氢气品质体系的建立、纯化技术的推广应用及燃料电池催化剂新材料开发均具有意义。
A modular Fourier Transform Infrared Spectroscopy(FTIR)characterization platform was designed and set up.The analytical method for determining hydrogen trace impurities in proton exchange membrane fuel cell vehicles(FCV)has been developed.After reducing the purity requirement of blank gas,specific target contaminants,including HCOOH,CO,CO_(2),NH_(3),H_(2)O,CH_(4),C_(2)H_(4),C_(2)H_(6),C_(3)H_(8),HCHO still could be rapidly determined simultaneously without any pre-process with high accuracy and reproducibility.The detection limits of the nine impurities still reach the ASTM D7653-18 reference value,and their quantitative limits are also lower than the corresponding limits of ISO 14687:2019.The method meets applicability verification rules in ISO_(2)1087:2019.According to the requirements of hydrogen trace impurities in different scenarios,the modular FTIR system can be organically combined with good practicability,and the hydrogen concentration can be reduced to 100μmol·mol^(-1) after treatment,which meets the safety and environmental protection requirements.It is consistent with the measured values of other reference methods in the laboratory.It will be gradually developed into an on-line method for different industrial scenarios.This is significant for the establishment of fuel-grade hydrogen quality systems,the application of purification technology and the development of new materials for fuel cell catalysts.
作者
袁蕙
刘丹
徐广通
YUAN Hui;LIU Dan;XU Guang-tong(SINOPEC Research Institute of Petroleum Processing Co.,Ltd.,Beijing 100083,China)
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2024年第3期853-858,共6页
Spectroscopy and Spectral Analysis
基金
国家重点研发计划课题项目(2019YFB1505004)
中石化重大科技项目(120014)资助。
关键词
傅里叶变换红外光谱
氢气
痕量杂质
Fourier Transform Infrared Spectroscopy(FTIR)
Hydrogen
Trace amount of impurities
