文献类型：期刊文献

英文题名：Effect of electrolyte circulation on hydrogen-in-oxygen in alkaline water electrolysis

作者：Zhou, Yujie[1];Zhang, Hao[1];Liu, Leixin[1];Yuan, Fang[1];Yang, Qiang[1];Liu, Bo[1]

机构：[1]East China Univ Sci & Technol, Dept Mech & Power Engn, Shanghai, Peoples R China

年份：2024

卷号：82

起止页码：143

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20243216805038);WOS:【SCI-EXPANDED(收录号:WOS:001285689400001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Nos. 22178099, 52025103) , the Shanghai Natural Science Foundation (21ZR1417000) , the Shanghai Special Basic Research Zone (22TQ1400100-11) , Shanghai Pujiang Program (21PJ1402000) , Carbon Neutral Special Project of Shanghai Municipal Science and Technology Commission-Research and Development of Key Technology and Equipment for High Efficiency and High Power Alkaline Water Hydrogen Generation (21DZ1207800) , the Research and Development of Key Technologies and Equipment for Carbon Capture and Mass Transfer Enhancement in Flue Gas of One Million Tons/Year (2022YFE0130000) , and the Hydrogen Energy Green Manufacturing and Utilisation Key Core Technology Integration and Research Platform.r Research Zone (22TQ1400100-11) , Shanghai Pujiang Program (21PJ1402000) , Carbon Neutral Special Project of Shanghai Municipal Science and Technology Commission-Research and Development of Key Technology and Equipment for High Efficiency and High Power Alkaline Water Hydrogen Generation (21DZ1207800) , the Research and Development of Key Technologies and Equipment for Carbon Capture and Mass Transfer Enhancement in Flue Gas of One Million Tons/Year (2022YFE0130000) , and the Hydrogen Energy Green Manufacturing and Utilisation Key Core Technology Integration and Research Platform.

语种：英文

外文关键词：Gas purity; HTO; Alkaline water electrolysis; Load limit

摘要：The concentration of hydrogen in oxygen (HTO) is a crucial factor in determining the load limit of alkaline water electrolysis (AWE) due to the risk of explosion with high HTO levels. In this study, we analysed the impact of circulating electrolytes, carrying dissolved gas, on HTO in a home-designed zero-gap alkaline water electrolysis system, operating at atmospheric pressure and constant temperature. By comparing the experimental results from mixed and separated cycles, we found that the amount of dissolved hydrogen in the electrolyte significantly contributes to HTO. We then developed a theoretical model to predict HTO values and experimentally confirmed a linear relationship between the HTO and the ratio of electrolyte circulation to gas production (QL/ QO2 ). Based on this evidence, we proposed a new electrolyte circulation control strategy that reduces the HTO value by as much as 63.56%. These findings could help overcome the load limit of alkaline water electrolysis systems, which is crucial for their large-scale application.