SELECTIVE OXIDATION OF H2S IN THE PRESENCE OF AMMONIA AND WATER USINGCO3O4 SIO2 CATALYST/

The catalytic performance of some metal oxides in the selective oxidat ion of H2S in the stream containing water Vapor and ammonia was invest igated in this study. Among the catalysts tested, Co3O4/SiO2 was the m ost promising catalyst for practical application. It showed very small amount of SO2 emission even in the presence of excess water and ammon ia. The solid product formed in the reaction was a mixture of elementa l sulfur, ammonium thiosulfate and ammonium sulfate.