Deuterium Isotope Separation by Combined Electrolysis Fuel Cell

Ogawa, Ryota and Tanii, Risako and Dawson, Richard and Matsushima, Hisayoshi and Ueda, Mikito (2018) Deuterium Isotope Separation by Combined Electrolysis Fuel Cell. Energy, 149. pp. 98-104. ISSN 0360-5442

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The framework about combined electrolysis fuel cell (CEFC) was reported previously [H. Matsushima et al., Energy, 2005; 30; 2413]. The purpose of the present study focused on measuring the separation factor and the energy reduction by assembling CEFC system. The separation of deuterium was studied with a 1-M KOH electrolyte containing 10 at% deuterium. Polarization plots of alkaline water electrolysis (AWE) revealed relationships between the catalytic activity of the hydrogen evolution reaction and the deuterium separation factor. The power loss was mainly attributed to gas bubble evolution. For polymer electrolyte fuel cells (PEFCs) with a Pt catalyst, approximately 21% of the electrical energy could be recovered by reusing hydrogen gas produced by the AWE. Furthermore, the PEFC could efficiently dilute protium in the gas phase, resulting in a high separation factor of 30.2 for the CEFC.

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This is the author’s version of a work that was accepted for publication in Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Energy, 149, 2018 DOI: 10.1016/
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26 Feb 2018 11:34
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21 Sep 2023 02:21