HYDROGENATION OF CARBON-DIOXIDE OVER METAL-CATALYSTS PREPARED USING MICROEMULSION

This paper relates to a novel preparation method of metal supported ca talysts using microemulsions. The size distribution of metal particles in the catalysts, thus, prepared was appreciably narrow and the avera ge particle size was much smaller than that of the conventional cataly st prepared from impregnation. It was found that the particle size cou ld be controlled by the conditions of microemulsions regardless of met al content. The Ph, Pd and Pt catalysts prepared from microemulsions w ere found to exhibit a much higher activity for the hydrogenation of c arbon dioxide than those from impregnation.