EXHAUST GAS PURIFYING APPARATUS AND EXHAUST GAS PURIFYING METHOD USING THE SAME

摘要

An apparatus for purification of exhaust gas comprises: an exhaust gas pipe (2) connected to an internal combustion engine (1); an upstream catalyst (3) arranged at the upstream side of an exhaust gas passage inside the exhaust gas pipe (2) ; a downstream catalyst (4) which is arranged at the downstream side of the exhaust gas passage inside the exhaust gas pipe (2), and on which nickel and/or iron is supported; and oxidizing gas supply means (5) which is connected to the exhaust gas pipe (2) between the upstream catalyst (3) and the downstream catalyst (4), and which supplies oxidizing gas into the exhaust gas pipe (2).