Nippon Shokubai Kagaku Kogyo Co., Ltd.

Terushige Uno

Akira Inoue

Motonobu Kobayashi

Futoru Kinoshita

Mitsuharu Hagi

The present invention concerns a method of removing nitrogen oxides in exhaust gases from a diesel engine by using a catalyst in a reacter under the presence of ammonia, wherein a humidity of in-take air as a specific factor and one or more of engine power, fuel consumption amount of engine, temperature of engine in-take air and exhaust gas temperature as selective factors are measured respectively as the measuring factors and the flow rate of ammonia is controlled based on measured values and ammonia is supplied to an exhaust gas flow channel from the engine to the reactor.

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Osaka, Japan

Terushige Uno