Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Patent
1987-07-29
1989-08-08
Heller, Gregory A.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
B01J 800, C01B 1700
Patent
active
048551155
ABSTRACT:
A process for removing nitrogen oxides from an exhaust gas containing the nitrogen oxides and an arsenic compound, which comprises bringing said exhaust gas into contact with a reducing gas in the presence of a catalyst to reduce the nitrogen oxides in the exhaust gas and render them nontoxic. There are disclosed two types of catalysts: (1) a catalyst comprising (A) an oxide of titanium, (B) an oxide of at least one metal selected from tungsten and molybdenum, (C) an oxide of vanadium, and (D) an oxide and/or a sulfate of at least one metal selected from the group consisting of yttrium, lanthanum, cerium and neodymium, and (2) the above (A), (B), (C) components and (D)' at least one metal selected from the group consisting of yttrium, lanthanum, cerium, neodymium, copper, cobalt, manganese and iron, the component (D)' being deposited on zeolite.
REFERENCES:
patent: 4466947 (1984-08-01), Imanari et al.
Fukuda Morio
Hanada Masayuki
Imanari Makoto
Koshikawa Takeo
Nagano Kiyoshi
Catalysts & Chemicals Industries Co. Ltd.
Heller Gregory A.
Mitsubishi Jukogyo Kabushiki Kaisha
Mitsubishi Petrochemical Co. Ltd.
Mitsubishi Petrochemical Engineering Co. Ltd.
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