Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Cataler Industrial Co., Ltd.

Toyota Chuo Kenkyusho Kabushiki Kaisha

Kouji Banno

Tetsuo Nagami

Takashi Ohta

Yoshiaki Fukushima

Akane Okada

Shinji Inagaki

Haruo Doi

Masahiro Sugiura

Koichi Kasahara

Yasuo Takada

Kazuyuki Kuroda

Yoshitsugu Ogura

Yuji Sakakibara

Kazuhiro Fukumoto

Shigeji Matsumoto

Masahiko Ogai

Shinji Matsuura

Yoko Kumai

Yukimura Yamada

Kiyotaka Hayashi

Norihiko Aono

A catalyst for purifying exhaust gases comprises a catalyst carrier made of potassium titanate and a noble metal loaded on the catalyst carrier. The catalyst carrier is substantially free from alumina. This catalyst can oxidize at least hydrocarbons in exhaust gases at a high catalytic activity even at low temperatures, and at the same time can suppress SO.sub.2 from converting into sulfates. This catalyst does not employ substance like alumina exhibiting solid acidity as a catalyst carrier. Further, this catalyst can be used for purifying exhaust gases from diesel engines to suppress particulates and sulfates from being emitted, and to improve conversions of hydrocarbons and carbon monoxide.

Catalyst for purifying exhaust gases

An exhaust gas purifying catalyst is characterized in that at least one kind of catalyst metal is loaded on a layered porous silica or a layered porous silica-metal oxide. The exhaust gas purifying catalyst is used as an oxidation catalyst for purifying hydrocarbon and carbon monoxide, or a reduction catalyst for purifying nitrogen oxides (NO.sub.x), which is suitable for purifying exhaust gases in automobiles. An exhaust gas purifying apparatus includes the above exhaust gas purifying catalyst and an absorbent for trapping hydrocarbon components, in which aromatic HC such as trimethylbenzene and the like are effectively trapped.

Exhaust gas purifying catalyst

Growing community of inventors

Nagoya, Japan

Kouji Banno