Energy reduction in water electrolysis using SO2 gas as anodic reactant

2015 Fiscal Year Final Research Report

• Project/Area Number: 26630381
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Metal making/Resorce production engineering
• Research Institution: Kyoto University
• Principal Investigator: Uda Tetsuya 京都大学, 工学(系)研究科(研究院), 教授 (80312651)
• Co-Investigator(Renkei-kenkyūsha): HATADA Naoyuki 京都大学, 工学研究科材料工学専攻, 助教 (00712952)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 水素製造 / 非鉄金属製錬 / 銅製錬 / 亜鉛製錬 / 硫酸製造

Outline of Final Research Achievements

Energy reduction in water electrolysis was investigated. In usual, counter reaction of hydrogen evolution is oxygen evolution but instead of such large over potential reaction, we utilized anode reaction of I-. As the result, we succeeded to decrease cell voltage with about 1 voltage. Reaction product of I3- can be recycled by the reduction of SO32-. SO32- can be obtained easily by dissolving SO2 gas in water, where SO2 is reaction product in nonferrous metallurgical processing. We wish further development of this idea.

Free Research Field

材料工学