Toyota Jidosha Kabushiki Kaisha

Cataler Industrial Co., Ltd.

Kabushiki Kaisha Toyota Chuo Kenkyusho

Tsuneyuki Tanizawa

Toshiaki Tanaka

Shinichi Takeshima

Shinichi Matsumoto

Satoshi Iguchi

Takaaki Kanazawa

Koichi Kasahara

Syuji Tateishi

Kenji Katoh

Naoto Miyoshi

Hideaki Muraki

Tadashi Suzuki

Kiyoshi Yamazaki

Takahiro Hayashi

Kazuhiko Dohmae

Motohisa Saiki

A method for purifying an exhaust gas by simultaneously removing carbon monoxide, hydrocarbons, and nitrogen oxides contained in the exhaust gas, comprising bringing the oxygen rich exhaust gas into contact with an exhaust gas purifying catalyst comprised of at least one noble metal selected from the group consisting of platinum and palladium, at least one alkaline earth metal selected from the group consisting of barium, magnesium, calcium, and strontium, and at least one alkali metal selected from the group consisting of iron, nickel, and cobalt, supported on a carrier composed of a porous substance.

Method for purifying exhaust gas

A catalyst for purifying exhaust gases includes a porous support, at least one catalyst ingredient selected from Pt and Pd, and additional ingredients including (1) at least two rare-earth elements including La, (2) at least one rare-earth element including La and at least one transition element selected from Fe, Ni, Co and Mn, (3) at least two alkali metals, (4) at least one alkali metal and at least one rare-earth element including La, (5) at least one alkali metal and at least one transition element selected from Fe, Ni, Co and Mn, (6) at least two alkaline-earth metals, (7) at least one alkaline-earth metal and at least one rare-earth element including La, or (8) Ba, Li, La, Ce and Zr. A process for purifying an exhaust gas, by contacting the catalyst with an exhaust gas, is also provided.

Process for purifying exhaust gases

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Toyota, Japan

Tsuneyuki Tanizawa