Novel Mesoporous Uranium-Oxide Based Catalysts for Removal of VolatileHydrocarbons and Chloro-Organic Compounds: Synthesis and Reactivity Studies

摘要

Catalytic combustion of volatile hydrocarbons and chloro-organic compounds at lowtemperatures provides an environmentally benign as well as an energy efficient route for their removal. The removal of chloro-organic compounds has been reported to occur at moderate temperatures (less than 673 K) with the use of supported and unsupported uranium-oxide-based catalysts that exhibit exceptionally high activity. The highly active uranium-oxide-based catalysts, synthesized by conventional catalyst preparation techniques, are nonporous materials where the bulk of the uranium-oxide catalysts may not be involved in the reaction. The use of molecular assemblies of surfactants or related substances as structure directors has led to the synthesis of highly ordered mesoporous aluminosilicates and various transition metal oxides with very high surface areas. These methods have been used in the present study for the synthesis of novel mesoporous supported and unsupported uranium-oxide-based catalysts that should exhibit exceptionally high activity for the thermal oxidation of volatile hydrocarbons and chloro-organic compounds. The synthesis and use of ordered porous uranium-oxide-based catalysts would not only greatly enhance the catalyst efficiency chloro-organic compounds but also provide an effective approach for the utilization of for the destruction of volatile hyhrocarbon and large amounts of depleted uranium from nuclear fuel production.