수전해 시스템 성능 향상을 위한 능동 이온수송 기술 연구

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 34; no. 2; pp. 132 - 140
• Main Authors: 김현중(HYEON-JUNG KIM), 궈하오(HAO GUO), 김상영(SANG-YOUNG KIM)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2023
• Subjects: 기계공학; Magnetic field(자기장); Hydrogen(수소); Water electrolysis(수전해); Alkaline water electrolysis(알칼리 수전해); Ion transportaion(이온 수송)
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/JHNE.2023.34.2.132

In this study, rotary magnet holder (RMH) was manufactured to analyze the ion transport effect according to the rotating magnetic field for the hydrogen production efficiency by alkaline water electrolyte. In the experiment, the voltage signal according to the magnet arrangement inside the RMH, the rotation speed, and the rotation time was measured using the voltage measurement module. As a result of the voltage signal measurement experiment, the average potential difference increased as the rotation speed of the RMH increased. Through the results of the voltage signal measurement experiment, the most efficient magnet arrangement (case 2) was applied to the RMH to conduct a water electrolysis experiment. A 20% NaOH aqueous solution was filled in the electrolytic cell, and a direct current 2 V constant voltage was applied to measure the current value according to the RMH rotation to compare the hydrogen generation amount. When rotating at 100 RPM, the hydrogen production efficiency increased by 8.06% compared to when not rotating. Considering the area exceeding +25 mA, which was not measured at the beginning of the experiment, an increase in hydrogen production of about 10% or more can be expected.