Carbon adsorption-reduction process for nitric oxides
Patent
·
OSTI ID:7248677
A combined carbon adsorption, catalytic reduction process for the removal of nitric oxides from large volumes of diluent gases, e.g., combustion gases from fossil-fueled power plants, is described which, unlike prior art carbon adsorption processes, allows for the reuse of the carbon adsorbent, made possible by the employment of low temperature (less than 300/sup 0/C) reduction. The gas to be treated is contacted with adsorbent carbon which is dispersed with metal materials to enhance low temperature catalytic reduction. The metals may consist of platinum group metals, copper, copper oxide, vanadium, molybdenum, or tungsten(VI) oxides. The catalyst consists of 85 percent iron(III) oxides, 10 percent chromium(III) oxides, and 2 percent chromium(VI) oxides. The adsorbed nitrogen oxides are subsequently reduced to nitrogen and water with a reducing agent selected from the group consisting of ammonia, carbon monoxide, hydrogen, and hydrocarbon gases at a temperature of 300/sup 0/C. The adsorbent is recycled for use again.
- Assignee:
- TIC; EDB-77-014158
- Patent Number(s):
- US 3795730
- OSTI ID:
- 7248677
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
AIR POLLUTION ABATEMENT
CARBON
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
COPPER
ELEMENTS
FLUIDS
FOSSIL-FUEL POWER PLANTS
GASES
HYDROCARBONS
IRON COMPOUNDS
IRON OXIDES
METALS
MOLYBDENUM
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POWER PLANTS
REDUCTION
REFRACTORY METALS
REMOVAL
SORPTION
THERMAL POWER PLANTS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TUNGSTEN
VANADIUM
010800 -- Coal
Lignite
& Peat-- Waste Management
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
AIR POLLUTION ABATEMENT
CARBON
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
COPPER
ELEMENTS
FLUIDS
FOSSIL-FUEL POWER PLANTS
GASES
HYDROCARBONS
IRON COMPOUNDS
IRON OXIDES
METALS
MOLYBDENUM
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POWER PLANTS
REDUCTION
REFRACTORY METALS
REMOVAL
SORPTION
THERMAL POWER PLANTS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TUNGSTEN
VANADIUM