EXHAUST GAS PURIFYING APPARATUS OF THERMAL ENGINE AND EXHAUST GAS PURIFYING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an exhaust gas purifying apparatus of a thermal engine, which purifies CO and HC in an exhaust gas in oxygen excessive atmosphere with high purification performance.SOLUTION: An exhaust gas purifying apparatus of a thermal engine is arranged at an exhaust gas channel 3 of the thermal engine discharging an exhaust gas of oxygen excessive atmosphere compared to a stoichiometric amount in an oxidation reaction of CO and HC. The exhaust gas purifying apparatus includes a first purifying part 5 containing a conversion catalyst component converting at least one adsorption component of NOx and HC in the exhaust gas or at least a part of HC in the exhaust gas into CO, and a second purifying part 6 containing a purifying catalyst component oxidizing CO or HC in the exhaust gas passing through the first purifying part 5 to purify.