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

作者：Kumagai Yuta^*

来源：Radiation Physics and Chemistry, 2014, 97: 223-232.

DOI：10.1016/j.radphyschem.2013.12.006

• Hydrogen peroxide
• Radiolysis
• Water
• Zeolite
• Heterogeneous system
• Kinetic calculation

Radiolysis of aqueous hydrogen peroxide (H2O2) solutions in the presence of Y-type zeolite was studied to clarify the radiation-induced reactions of H2O2 in water-zeolite heterogeneous systems. The mixtures of the solutions with the zeolite were irradiated by y-rays. H2O2 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 H2O2 adsorbed on the zeolite was proposed and introduced into the kinetic model as an effect of the zeolite. The decomposition of adsorbed H2O2 was formulated as a reaction induced by energy deposition on the zeolite. The kinetic model calculations satisfactorily explained the measured H2O2 decomposition by adopting a high yield for the introduced reaction, 1.4 x 10-6 mol J-1. Moreover a comparison of the calculations with the measured production of oxygen (02) indicates that reduction and oxidation of adsorbed H2O2 proceeded at comparable yields during decomposition. Further, measurements of hydrogen (H-2) suggest that the zeolite had little effect on H2 production at high H2O2 concentrations.

• 出版日期2014-4