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Report No.
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Development of ion exchange membranes for Bunsen reaction

Kodaira, Takahide; Ikeda, Ayumi*; Matsuyama, Emi*; Kono, Nobuho*; Sawada, Shinichi; Yamaki, Tetsuya; Nomura, Mikihiro*

In the thermochemical water splitting IS process, the Bunsen reaction (SO$$_{2}$$ + I$$_{2}$$ + 2H$$_{2}$$O = H$$_{2}$$SO$$_{4}$$ + 2HI) needs to be achieved in an electrochemical cell with an ion exchange membrane, which renders separation procedures unnecessary. As part of a JST-ALCA project, therefore, we have been developing ion exchange membranes for this application by using methods of radiation crosslinking and/or radiation graft polymerization. Our preliminary experiments made it possible to confirm controllability of the degree of grafting, ${it i.e.}$, ion exchange capacity by varying the conditions of the grafting.

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