Development of a redox type reactor by using ion exchange membrane

Kodaira, Takahide*; Oura, Kotone*; Ikeda, Ayumi*; Ono, Ryuhei*; Matsuyama, Emi*; Nomura, Mikihiro*; Sawada, Shinichi; Yamaki, Tetsuya; Tanaka, Nobuyuki ; Kubo, Shinji  

Bunsen reactor in the IS process has a potential of the downsizing and the improvement of efficiency by using redox type reactor with an ion exchange membrane. The key to the performance of redox reactor is the development of the high performance ion exchange membrane. In this paper, we investigated the performance (proton transport number (t) and water permeation factor ()) of Nafion 212, which is the reference. As a result, t and were 0.63 and 2.82, respectively, indicating that not only H but also I and water permeate through the membrane. The permeation of these components might cause the precipitation of sulfur and the rising of the voltage. Aftertime, we must new ion exchange membrane which can restrict the permeation of I and water.