Nkk Corporation

N.e. Chemcat Corporation

Eiichi Shibuya

Toshihiko Iwasaki

Toshihiko Sakurai

A catalyst including a first catalyst ingredient which is at least one element selected from a group consisting of Pt, Pd and Ir, or oxides thereof; and further able to include at least one element selected from a group consisting of Au, Ag, Cu, Fe, Sb, Se, Te and Ta, or oxides thereof, as a second catalyst ingredient, carried on at least one of a silica-boria-alumina composite oxide or a zeolite with a silica-to-alumina molar ratio of more than 30, in amounts of from 0.1 to 10 g of the first catalyst ingredient and from 0.01 to 5 g of the second catalyst ingredient based on one liter of the catalyst with the second to first catalyst ingredient weight ratio being less than 1. The catalyst is used for treating exhaust gases by bringing the exhaust gases containing HCl and dioxines into contact with the catalyst to thereby eliminate the HCl and dioxines from the exhaust gases by oxidative decomposition while suppressing the subsequent formation of dioxines from precursors for the dioxines present in the exhaust gases.

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Tokyo, Japan

Eiichi Shibuya