Abstract: A catalyst system for deodorization and an apparatus for deodorization, each of which comprises a pretreating catalyst and a noble metal catalyst, the pretreating catalyst converting a sulfur atom of low oxidation state which deactivates the noble metal catalyst into a sulfur atom of high oxidation state which has little deactivation effects thereon, the noble metal catalyst oxidizing aldehyde, etc., wherein a material to be deodorized is brought into contact with the pretreating catalyst prior to being brought into contact with the noble metal catalyst. As the pretreating catalyst, a catalyst comprising at least one selected from the group consisting of vanadium, chromium, manganese, iron, cobalt, nickel, copper and oxides thereof is used, while as the noble metal catalyst, a catalyst comprising at least one selected from the group consisting of ruthenium, rhodium, palladium, silver, rhenium, osmium, iridium, platinum and gold is used.

Abstract: The present invention relates to a &ggr;-Al2O3 sorbent impregnated with alkali salt and CuO, which has a superior SO2 sorption capacity and a high regeneration conversion rate. A &ggr;-Al2O3 sorbent of the present invention is impregnated with alkali salt and copper oxide, whose alkali salt and copper oxide(CuO) contents are 1 to 10 wt. % and 5 to 20 wt. % against 100 wt. % &ggr;-Al2O3 carrier, respectively. The &ggr;-Al2O3 sorbent of the invention has a superior SO2 sorption capacity and a high regeneration conversion rate, which facilitates efficient removal of SO2 by the conventional dry method.