Dual catalyst nitric oxide reduction

Details Dual catalyst nitric oxide reduction Dual catalyst nitric oxide reduction

B - Operations, Transporting

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B01D 53/00 (2006.01) B01D 53/94 (2006.01) F01N 3/20 (2006.01) F01N 13/02 (2010.01) F02B 3/06 (2006.01)

Patent

CA 1100287

Abstract of the Disclosure Exhaust gases from diesel and some other engines vary in tem- perature from about 100°C to about 800°C. Exhaust is passed along with ammonia to a first reactor wherein the ammonia reduces nitric oxide at temperatures down to about 260°C. At these temperatures the effluent from the reactor is passed to the exhaust. When the first reactor effluent is at a temperature below about 260°C, it is passed through a second reactor after intermediate cooling, wherein it contacts an ammonium halide on activated charcoal catalyst at a temperature of 100°C to 170°C, which catalyst catalizes the low tem- perature reduction of nitric oxide with ammonia.

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