| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust gas purifying device and an exhaust gas purifying method that the catalyst is activated by generating heat at a cool starting time and the use life is enhanced. SOLUTION: This device is provided with a catalyst 3 arranged in the midway of an discharge path 2 of an engine 1 and formed by carrying calcium oxide, and the activation of the catalyst 3 is attained by hydration reaction heat of the carried calcium oxide at a cool starting time, and calcium hydroxide, etc., produced with the hydration reaction are decomposed to calcium oxide with heat of the exhaust gas G after the engine is warmed. Then, the calcium oxide supported on the catalyst 3 can be effectively re-utilized as a heat generator. |
