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Decomposition of hydrogen peroxide by $$gamma$$-ray irradiation in mixture of aqueous solution and Y-type zeolite

Kumagai, Yuta  

Radiolysis of aqueous H$$_{2}$$O$$_{2}$$ solutions in the presence of Y-type zeolite was studied to clarify the radiation-induced reactions of H$$_{2}$$O$$_{2}$$ in water-zeolite heterogeneous systems. The mixtures of the solutions with the zeolite were irradiated by $$gamma$$-rays. H$$_{2}$$O$$_{2}$$ decomposed remarkably in the presence of the zeolite. Numerical calculations using a kinetic model were performed and compared with the experimental results. A reaction that decomposes H$$_{2}$$O$$_{2}$$ adsorbed on the zeolite was proposed and introduced into the kinetic model as an effect of the zeolite. The kinetic model calculations satisfactorily explained the measured H$$_{2}$$O$$_{2}$$ decomposition by adopting a high yield for the introduced reaction. Moreover a comparison of the calculations with the measured production of O$$_{2}$$ indicates that reduction and oxidation of adsorbed H$$_{2}$$O$$_{2}$$ proceeded at comparable yields during decomposition.

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Category:Chemistry, Physical

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