Process for the catalytic incineration of residual gases containing a low content of at least one sulfur compound selected from COS, CS2 and the mercaptans and possibility at least one member of the group

摘要

A process for the catalytic incineration of residual gases containing a low content of H2S and/or SO2, organic compounds of sulfur such as COS, CS2, mercaptans and possibly vapor and/or vesicular sulfur, comprising a hydrogenation stage which transforms all the sulfur compounds into H2S followed by a catalytic oxidation stage to transform H2S into SO2. The catalyst used in the oxidation stage consists in a porous support, having a surface area of at least 5 m2/g and containing, by weight, 50 to 100% of a product selected from the group comprising titanium or zirconium oxides, silica and zeolites, and 50 to 0% alumina, to which is associated one or several compounds of metals belonging to the group formed by Cu, Ag, Zn, Cd, Y, Lanthanides, V, Cr, Mo, W, Mn, Fe, Co, Rh, Ir, Ni, Pd, Pt, Sn and Bi. The use of such an oxidation catalyst leads to a practically quantitative yield of conversion of H2S into SO2, this yield being maintained steadily throughout the process.