Cosmo Oil Co., Ltd.

Sakai Chemical Industry Co., Ltd.

Petroleum Energy Center

Agency of Industrial Science and Technology

Japan as Represented by Director General of Agency of Industrial Science

Hiroshi Tsuchida

Tadao Nakatsuji

Hiromitsu Shimizu

Ritsu Yasukawa

Mitsunori Tabata

Yoshiaki Kintaichi

Katsumi Miyamoto

Motoi Sasaki

Masaaki Kawatsuki

Takehiko Ito

Hideaki Hamada

Fujio Suganuma

Kazushi Usui

Tomohiro Yoshinari

Akihiro Kitazume

A process for removing nitrogen oxide from exhaust is disclosed, comprising contacting exhaust containing nitrogen oxide with an alumina catalyst which contains not more than 0.5% by weight of an alkali metal and/or an alkaline earth metal and has a total pore volume of from 0.48 to 1.2 cm.sup.3 .multidot.g.sup.-1 with 0.26 to 0.6 cm.sup.3 .multidot.g.sup.-1 of the total pore volume being formed of pores of not greater than 80 .ANG. or has a volume of pores formed of pores of not greater than 60 .ANG. of from 0.06 to 0.2 cm.sup.3 .multidot.g.sup.-l and which may have supported thereon tin in an oxidative atmosphere containing excess oxygen in the presence of a hydrocarbon or an oxygen-containing organic compound.

Removal of nitrogen oxide from exhaust gas

A catalyst for catalytic reduction of nitrogen oxides using a hydrocarbon and/or a oxygen-containing organic compound as a reducing agent is disclosed, which comprises a cerium oxide supported on a solid acid carrier. Also, a catalyst for catalytic reduction of nitrogen oxides using a hydrocarbon and/or an oxygen-containing organic compound as a reducing agent is disclosed, which comprises:

Catalyst for catalytic reduction of nitrogen oxides

A novel catalyst for catalytic reduction of nitrogen oxide using a hydrocarbon as a reducing agent is provided, which comprises (a) at least an element of the platinum group selected from the group consisting of platinum, iridium, rhodium and ruthenium and (b) gold, and which may further comprises (c) at least a metallic oxide selected from the group consisting of cerium oxide, lanthanum oxide, neodymium oxide, germanium oxide and gallium oxide.

Catalyst for catalytic reduction of nitrogen oxide

A catalyst for catalytic reduction of nitrogen oxide using at least one reducing agent selected from the group consisting of a hydrocarbon and an oxygen-containing organic compound is described, which includes an oxide represented by formula (V):

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Kanagawa, Japan

Hiroshi Tsuchida