Study the effect of lye flow rate, temperature, system pressure and different current density on energy consumption in catalyst test and 500W commercial alkaline water electrolysis. (January 2022)

• Record Type: Journal Article
• Authors: Li, Yangyang; Zhang, Tao; Ma, Jugang; Deng, Xintao; Gu, Junjie; Yang, Fuyuan; Ouyang, Minggao
• Is Part Of: Materials today physics. Volume 22(2022)
• Publication Date: 2022-01
• Subjects: ALK -- Lye flow rate -- Catalyst test -- Temperature and pressure -- Voltage performance; Materials science -- Periodicals; Physics -- Periodicals; Electronic journals; 530.41
• DOI: 10.1016/j.mtphys.2022.100606
• Languages: English
• ISSNs: 2542-5293

Abstract

Abstract: In order to analyze the controlling factors affecting the performance of Alkaline water electrolyzer, an experimental test was carried out in this study, the lye flow rate, temperature, system pressure and different current density varied in different operating conditions. Besides, the Catalyst test was also tested to study the effect of temperature and lye flow rate on the voltage. The results showed that (1) The lowest electrolysis potential is shown in Catalyst test at 200 rpm; (2) Form the aspect of total hydrolysis test, with increased temperature, the better the catalyst activity, what is more, the optimal lye flow rate was found to get minimum voltage; (3) in general, the voltage decreased with the increased temperature and decreased pressure, under the 30 °C, the maximum decreasing extent reached up to 1.3%, moreover, the decreasing extent reached up to 1.28% at the 60 °C; (4) with the increased lye flow rate, the voltage turns down, but the decreased extent turns small, for example, when the lye flow rate changed form 71 L/h to 198 L/h, the change extent of voltage is only 0.025 V. The experimental data can be used to analyze the influence of different operating conditions on the performance of electrolyzer and to improve or optimize . Graphical abstract: Image 1 Highlights: A fully and multi-sensor Alkaline water electrolyzer tested platform is developed. The lowest electrolysis potential is shown in Catalyst test at 200 rpm. Under 60 °C, the maximum decreasing extent of voltage is up to 1.3%. Voltage decreases with increased lye flow rate and its decreasing extent decreases with increase pressure.