Catalyst for catalytic reduction of nitrogen oxide
AssigneesSakai Chemical Industry Co., Ltd., Petroleum Energy Center, Cosmo Oil Co., Ltd., Agency of Industrial Science and Technology
InventorsTadao Nakatsuji, Hiromitsu Shimizu, Ritsu Yasukawa, Masaaki Kawatsuki, Mitsunori Tabata, Hiroshi Tsuchida, Yoshiaki Kintaichi, Motoi Sasaki
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Abstract
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.
Claims20
A catalyst for catalytic reduction of nitrogen oxide using a hydrocarbon as a reducing agent, which comprises:
- (a) at least one element of the platinum group selected from the group consisting of platinum, iridium, rhodium and ruthenium;
- and
- (b) gold in an amount of 0.01 to 10 parts by weight based on 100 parts by weight of the at least one element of the platinum group.
A catalyst for catalytic reduction of nitrogen oxide using a hydrocarbon as a reducing agent, which comprises:
- (a) at least one element of the platinum group selected from the group consisting of platinum, iridium, rhodium and ruthenium;
- (b) gold in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the at least one element of the platinum group;
- and
- (c) at least one metallic oxide selected from the group consisting of cerium oxide, lanthanum oxide, neodymium oxide, germanium oxide and gallium oxide in an amount of 100 to 100,000 parts by weight based on 100 parts by weight of the at least one element of the platinum group.
Dependencies are inferred from the claim text.