Hitachi, Ltd.

Morio Fujitani

Toshio Ogawa

Hisao Yamashita

Osamu Kuroda

Yuichi Kitahara

Hidehiro Iizuka

Masato Kaneeda

Kojiro Okude

Toshifumi Hiratsuka

Kousei Nagayama

Nitrogen oxides contained in an exhaust gas emitted from a lean-burn engine-mounted internal combustion engines are eliminated with a high efficiency. In an exhaust gas purification apparatus and process for eliminating nitrogen oxides contained in a combustion exhaust gas emitted from an internal combustion engine with a reducing gas such as carbon monoxide, hydrocarbons, etc. contained in the exhaust gas in the presence of a catalyst, a catalyst comprising all of Rh, Pt and Pd, at least one member selected from alkali metals and alkaline earth metals, and Mn or its compound, supported on a porous carrier is used.

Internal combustion engine exhaust gas purification apparatus, exhaust gas purification process and exhaust gas purification catalyst

In an exhaust gas purification process for eliminating nitrogen oxides contained in a combustion exhaust gas emitted from an internal combustion engine with a reducing gas such as carbon monoxide, hydrocarbons, etc. contained in the exhaust gas in the presence of a catalyst, a catalyst comprising all of Rh, Pt and Pd, at least one member selected from alkali metals and alkaline earth metals, and Mn or its compound, supported on a porous carrier is used.

Exhaust emission control process for internal combustion engines

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Akashi, Japan

Morio Fujitani