Patent ID: 8128881

Claim:
An exhaust-gas converting apparatus comprising: a storage catalyst for storing NO x and SO x ; and an NO x storage-and-reduction catalyst being put in place on an exhaust-gas-flow downstream side of the storage catalyst, the exhaust-gas converting apparatus being characterized in that the storage catalyst comprises: a supporter substrate, which is formed of at least one member being selected from the group consisting of Al 2 O 3 , CeO 2 , ZrO 2 , TiO 2 and zeolite, and whose specific surface area is 30 m 2 /g or more; and a coating layer, which is formed on a surface of the supporter substrate, and which comprises: a supporting powder comprising at least one member being selected from the group consisting of Al 2 O 3 , CeO 2 , ZrO 2 , TiO 2 and zeolite; a storage material for storing NO x and SO x , the storage material being supported on the supporting powder; and a noble metal being supported on the supporting powder.