Development of Hetero-Sided Photocatalyst Plate Reactors/ Hydrogen Production by Reducing Water with Solar Light Using Sulfur as Electron Source

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Objectives:1. Development of Photocatalytic Reaction Engineering2. Development of Hetero-Sided Photocatalyst Plate ReactorsResults:1. Development of Photocatalytic Reaction EngineeringReaction rate of photocatalytic hydrogen production by Reducing Water with Solar Light Using Sulfur as Electron Source was formulated as eq.(1)r = k*exp(-38/(RT))? CA, (1)where r, k*, C, R, T, and A are the hydrogen generation rate [mol-H_2 h^1], a rate constant [mh^1] the reactant Na_2S concentration [M], the gas constant (0.008314 kJK^-1 mol^1), the reaction temperature [K], and the area [m^2] of the reactor bottom covered with photocatalysts, respectively.2. Development of Hetero-Sided Photocatalyst Plate ReactorsA membrane type reactor realizing quantum efficiency several-fold higher than conventional ones was developed. The reactor can minimize recombination of electrons with positive holes, and reduce reverse reactions at catalyst surface.