Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine
Patent
1995-09-22
1997-08-19
Bos, Steven
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Mixture is exhaust from internal-combustion engine
4232137, 4232391, 4232451, 423247, B01D 5356, B01D 5392, B01D 5394
Patent
active
056585438
ABSTRACT:
Nitrogen oxides are efficiently removed frown an exhaust gas containing nitrogen oxides and an excess amount of oxygen, by (i) disposing an exhaust gas cleaner in a flow path of the exhaust gas, the exhaust gas cleaner comprising a first catalyst comprising 0.2-15 weight % (on a metal basis) of silver or silver oxide supported on a porous inorganic oxide on the inlet side and a second catalyst comprising 0.2-15 weight % (on a metal basis) of silver or silver oxide and 2 weight % or less (on a metal basis) of copper or copper oxide supported on a porous inorganic oxide on the outlet side; (ii) introducing hydrocarbons and/or oxygen-containing organic compounds into the exhaust gas on the upstream side of the exhaust gas cleaner; and (iii) bringing the exhaust gas into contact with the exhaust gas cleaner at a temperature of 200.degree.-600.degree. C.
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Translation of '1844 reference.
Hawley The Condensed Chemical Dictionary, 1981, p. 740 (No Month).
Abe Akira
Irite Naoko
Muramatsu Gyo
Yoshida Kiyohide
Bos Steven
Kabushiki Kaisha Riken
Vanoy Timothy C.
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