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Oral presentation

Water permeability of the novel cation exchange membranes and their applications

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

no journal, , 

no abstracts in English

Oral presentation

Development of membrane reactor by using silica hybrid membranes

Ikeda, Ayumi*; Ono, Ryuhei*; Matsuyama, Emi*; Nomura, Mikihiro*; Tanaka, Nobuyuki; Kubo, Shinji

no journal, , 

In the IS process, the improvement of efficiency and the downsizing can be achieved if equilibrium inversion rate of HI decomposition is improved by using membrane reactor with hydrogen separation membrane. In this paper, the application to the silica hybrid membrane prepared by counter diffusion CVD method was investigated. As a result, we can obtain the H$$_{2}$$/HI permeation rate, 6820 and the H$$_{2}$$ permeance, 5.0$$times$$10$$^{-7}$$mol m$$^{-2}$$ s$$^{-1}$$ Pa$$^{-1}$$ at 400 $$^{circ}$$C, indicating that this membrane can be applied to this system. In addition, relation between SF$$_{6}$$ and HI permeance of membrane was investigated and verified to show the positive correlation. This result indicates that HI permeance of membrane can be evaluated by using SF$$_{6}$$ permeance, which can be easily treated.

Oral presentation

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

no journal, , 

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 ($$beta$$)) of Nafion 212, which is the reference. As a result, t$$_{+}$$ and $$beta$$ 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.

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