307 Oxidation Mechanisms of Hydrogen Off-gas from Fuel Cells by Atmospheric Non-equilibrium Plasma

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  • 307 大気圧非平衡プラズマにおける燃料電池水素オフガスの酸化機構(大気環境保全・改善技術(2))

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The removal of hydrogen in off-gas from fuel cells is desired to be safely processed. In the present research, simulated molecular hydrogen gas mixed with oxygen and nitrogen gases was directly removed in an intermitt ent dielectric barrier discharge (DBD). Hydrogen was oxidized even in a temperature lower than 100℃. A hydrogen conversion rate of approximately 100% (98.8%) was obtained at a consumes power of 1.2kW for a gas temperature of 80℃. When oxygen concentration was increased, NO was obtained as a by-products. But NO was reduction by increase of equivalence ratio. Their reaction mechanism was investigated at simulation with elementary reactions of H/O systems.

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