US 8,410,013 B2 · Catalyst for treating exhaust gas

Abstract

Provided is a catalyst for treating exhaust gas capable of reducing the amount of a highly corrosive mercury-chlorinating agent to be added while keeping the mercury oxidation efficiency high in an exhaust gas treatment. By the catalyst for treating exhaust gas, nitrogen oxide in the exhaust gas is removed upon contact with ammonia serving as a reducing agent, and mercury is oxidized using a halogen serving as an oxidant. The catalyst includes: TiO2 as a support; an oxide of at least one selected from the group consisting of V, W and Mo, which is supported as an active component on the support; and at least one selected from the group consisting of Bi, P, and compounds containing Bi and/or P, which is supported as a co-catalyst component on the support.

Claims4

Dependent claims

A catalyst for treating exhaust gas in which nitrogen oxide in the exhaust gas is removed upon contact with ammonia serving as a reducing agent, and in which mercury is oxidized using a halogen as an oxidant, the catalyst obtained by a method comprising the steps of:

impregnating a honeycomb catalyst with a co-catalyst in an aqueous solution comprising the co-catalyst, and
firing the resultant product;
wherein:
the honeycomb catalyst comprises an oxide of at least one selected from the group consisting of V, W and Mo, which is supported as an active component on TiO2 as a support;
and
the co-catalyst is at least one selected from the group consisting of Bi, P, and compounds containing Bi and/or P.

3 more elements

Dependencies are inferred from the claim text.

Catalyst for treating exhaust gas

Life of this patent

Catalyst for treating exhaust gas

Life of this patent

Abstract

Claims4