Process for catalytic vapor phase reduction of nitrogen oxides and catalyst composition used therefor
Patent
·
OSTI ID:5693450
A catalyst composition is disclosed for the vapor phase reduction of nitrogen oxides with ammonia, which consists essentially of a non-noble transition metal compound supported on a shaped carrier comprising a titanium oxide and a clay mineral having an average particle size of 0.1 to 100 microns. The shaped carrier preferably contains an additional component which is an inorganic fibrous material, silica hydrogel, silica sol, or a mixture of at least two of these. An exhaust gas containing nitrogen oxides is treated, with a high percent no removal, by contacting it with the catalyst composition in the presence of ammonia gas at 200 to 600/sup 0/C.
- Assignee:
- Catalysts and Chemicals Ind Co Ltd Japan; Mitsui Petrochemical Industries Ltd (Japan)
- Patent Number(s):
- US 4188365
- OSTI ID:
- 5693450
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
33 ADVANCED PROPULSION SYSTEMS
330100 -- Internal Combustion Engines
330701* -- Emission Control-- Nitrogen Oxides
ADSORBENTS
AIR POLLUTION CONTROL
AMMONIA
CATALYSTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CONTROL
ENGINES
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
HYDRIDES
HYDROGEN COMPOUNDS
INTERNAL COMBUSTION ENGINES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
REMOVAL
SILICA GEL
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
WASTES
330100 -- Internal Combustion Engines
330701* -- Emission Control-- Nitrogen Oxides
ADSORBENTS
AIR POLLUTION CONTROL
AMMONIA
CATALYSTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CONTROL
ENGINES
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
HYDRIDES
HYDROGEN COMPOUNDS
INTERNAL COMBUSTION ENGINES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
REMOVAL
SILICA GEL
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
WASTES