[Decreased activity of the palladium catalyst during the processing of vital activity wastes].

The effect of water vapors on the palladium catalyst activity during complete oxidation of organic compounds was studied. The catalyst activity was essentially unaltered when the vapor content in the vapor-gas mixture was below 50 mg/1. The effect of hydrogen sulphide on the palladium catalyst activity during oxidation of organic compounds was investigated. In order to reduce catalyst activity by 80%, 2 mg hydrogen sulphide in the oxidized gas mixture were needed. Catalyst activity was not restored after hydrogen sulphide removal from the gas mixture. It was also demonstrated that the use of a barium-alumovanadium catalyst as a forecontact eliminated the effect of palladium catalyst poisoning and provided a high degree of convesrion during oxidation on this contact.