CONTACT REDUCTION METHOD OF NITROGEN OXIDES

Japanese Patent JP3781830

B2

PROBLEM TO BE SOLVED: To provide a contact reduction method of nitrogen oxides by using hydrocarbons as a reducing agent, namely, to provide a contact reduction method of nitrogen oxides by which nitrogen oxides in an exhaust gas can be stably and efficiently reduced by a contact method at low temp. without using a large amt. of a reducing agent.
SOLUTION: In a contact reduction method of nitrogen oxides included in an exhaust gas by using a reducing agent in the presence of a catalyst, an exhaust gas containing nitrogen oxides and a reducing agent comprising hydrocarbons is brought into contact with a first catalyst in the first stage. This catalyst is provided by depositing chlorine ion by 0.05 to 2wt.% on an alumina. Then, in the second stage, the exhaust gas is brought into contact with a second catalyst selected from silver, silver oxide and silver aluminate.

WO/1997/039490	THERMALLY ENHANCED COMPACT REFORMER
JPS6042256	[Title of the device] A recycling apparatus of the organic-solvent content exhaust air in a coating facility

Tadao Nakatsuji
Ritsu Yasukawa
Keiichi Tabata

JP21734796A

May 31, 2006

August 19, 1996

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Petroleum Industry Activation Center
Sakai Chemical Industry Co., Ltd.

B01D53/86; B01D53/94; B01J21/04; B01J23/50; (IPC1-7): B01D53/94; B01D53/86; B01J21/04; B01J23/50

JP8206499A
JP7108136A
JP5092125A
JP7275706A
JP4083516A
JP9201515A
JP10057771A
JP9141056A
JP9155163A
JP6198130A

Ichiro Makino

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