SUPPORTED GOLD CATALYST THAT IS THERMALLY RESISTANT TO DEACTIVATION PHENOMENA UNDER OPERATING CONDITIONS

摘要

The invention relates to a supported gold catalyst that is thermally resistant to deactivation phenomena under operating conditions. More specifically, the invention relates to a catalytic system of formulation Ce0₂/Au/Ti0₂, obtained by means of the post-synthesis modification of a gold catalyst supported on a reducible oxide, in this case ΤΊΟ₂. The interaction between its three components produces greater catalytic activity in the reaction used as a test (CO oxidation), but, above all, it displays greater stability during treatments in a reaction atmosphere at temperatures of the order of 1223 K. The low thermal stability of gold is currently considered to be one of the main impediments to its commercial use in processes in which it has been shown to be active. In this respect, the catalyst described is presented as a possible solution to these problems, also allowing the use of gold in catalytic applications that require severe thermal conditions.