수소연료전지 폐기물 기반 백금촉매 재자원화 시 침출 공정인자 연구

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 35; no. 6; pp. 643 - 649
• Main Authors: 권택관(TAEK-KWAN KWON), 황용우(YONG-WOO HWANG), 정인홍(IN-HONG JUNG)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2024
• Subjects: 기계공학; Leaching rate(침출률); Waste catalyst(폐촉매); Aqua regia(왕수); Hydrogen fuel cell(수소연료전지); Concentration(농도); Temperature(온도)
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/JHNE.2024.35.6.643

Platinum group metal (PGM) are important rare metals used in advanced industries, and their reserves are geographically concentrated, limiting their stable global supply. This study is an experimental study to derive process conditions that show the maximum and optimal leaching rate by appropriately combining three process factors: first, leaching concentration, second, leaching temperature, and third, concentration time, in the leaching process, which is the most important recycling process for platinum contained in trace amounts in various wastes such as first, waste catalyst (solid), second, waste catalyst (liquid), third, waste water, and fourth, waste membrane electrode assembly generated during the hydrogen fuel cell manufacturing process. As a result of a comparative leaching test of PGM with several oxidizing agents, aqua regia, which has a strong oxidizing power, was used as a platinum leaching agent because it generates nitrosyl chloride.