Cosmo Oil Co., Ltd.

Sakai Chemical Industry Co., Ltd.

Petroleum Energy Center

Other

Agency of Industrial Science and Technology

Japan as Represented by Director General of Agency of Industrial Science

Cosmo Research Institute

Katsumi Miyamoto

Mitsunori Tabata

Tadao Nakatsuji

Hiromitsu Shimizu

Tomohiro Yoshinari

Ritsu Yasukawa

Hiroshi Tsuchida

Sadao Takehara

Kazuhito Sato

Yoshiaki Kintaichi

Motoi Sasaki

Takehiko Ito

Hideaki Hamada

Fujio Suganuma

Masaaki Kawatsuki

Kazushi Usui

Akihiro Kitazume

A reduction purification method of a nitrogen oxide-containing exhaust gas by contacting said nitrogen oxide-containing exhaust gas with a catalyst in an oxidative atmosphere in which an excess amount of oxygen is present and in the presence of a least one reducing agent selected from the group consisting of a hydrocarbon and an oxygen-containing organic compound, wherein said catalyst comprises an alumina having supported thereon (a) tin and (b) at least one selected from the group consisting of ruthenium, palladium, rhodium and indium.

Reduction purification method of nitrogen oxide-containing exhaust gas

A reduction purification method of a nitrogen oxide-containing exhaust gas by contacting said nitrogen oxide-containing exhaust gas with a catalyst in an oxidative atmosphere in which an excess amount of oxygen is present and in the presence of at least one reducing agent selected from the group consisting of a hydrocarbon and an oxygen-containing organic compound, wherein said catalyst comprises an alumina having supported thereon (a) tin and (b) at least one selected from the group consisting of ruthenium, palladium, rhodium and indium.

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 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):

Catalyst for catalytic reduction of nitrogen oxide

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Saitama, Japan

Katsumi Miyamoto