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PNC TJ9164 96-023, 1167 Pages, 1996/07

PNC-TJ9164-96-023.pdf:23.37MB

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Development of radiation-grafted cation exchange membranes for hydrogen production; Designing a new grafting container for large-size membranes

Yamaki, Tetsuya; Sawada, Shinichi; Nomura, Mikihiro*

no journal, , 

A thermochemical water-splitting IS process, known to be one of the hydrogen production methods, includes the Bunsen reaction, SO + I + 2HO = HSO + 2HI. Researchers previously attempted the Bunsen reaction using a Nafion membrane in an electrochemical cell and then found SO permeation through the membrane problematic. Therefore, our research target is to develop Nafion-alternative cation exchange membranes for applications in the electrochemical Bunsen reaction by radiation-graft polymerization. In an effort to do so, we report here the design of a new grafting container, which enables us to prepare large-size membranes for up-scaling the IS process. The stainless-steel reactor had more or less volumetric capacity than the conventional separable glass container. In designing such a vessel, there were two important issues to be considered: (1) how to heat a grafting solution fast and uniformly and (2) how to situate substrate films in the container.