Catalyst composition, exhaust gas treatment method using the same, and exhaust gas treatment system including the same

Abstract

A selective catalytic reduction catalyst composition for treating exhaust gas containing nitrogen oxides, an exhaust gas treatment method using the catalyst composition, and an exhaust gas treatment system including the catalyst composition. The catalyst composition includes a first catalyst including a silver oxide represented by AgmOx wherein m=1 or m=2, and 0.5≤x≤5, silver metal represented by Ag, or a combination thereof. A second catalyst includes a metal oxide represented by MaOb wherein 1≤a≤5, and 1≤b≤5, a metal represented by M, and a combination thereof, where M is an element other than silver, belonging to Groups 3 to 14 and 16 of the Periodic Table of Elements; and a support.

Dependencies are inferred from the claim text.