NO/sub x/ control and recovery from products of combustion

Patent · Fri Jun 20 04:00:00 EDT 1980

OSTI ID:6852077

Evoniuk, C J; McCandless, F P

The disclosed method for removing nitric oxide and or nitrogen dioxide (NO/sub x/) from a gaseous stream comprises the step of intimately mixing sodium or potassium carbonate and either ferric oxide or manganese dioxide. The gaseous stream containing NO/sub x/ is subsequently brought into contact with the mixture at a temperature between 300/sup 0/C and 500/sup 0/C to cause absorption of the NO/sub x/ in the mixture. Nitric oxide can be desorbed from the mixture by elevating its temperature or by other chemical processes. It is also possible to return the concentrated NO/sub x/ gaseous products to the producing combustion chamber for decomposition at the equilibrium concentration at the combustion chamber temperature. It is a first object of this disclosure to provide an effective solid sorbent for NO/sub x/ in a gaseous stream, the sorbent being produced by simple mixing without requiring further preprocessing of the chemicals before or after their mixture. Another object of this invention is to provide a solid sorbent having higher absorbing capabilities than those previously reported. Another object is to provide a solid sorbent which is effective in gaseous streams containing substantial quantities of either carbon dioxide or oxygen.

• Assignee: Dept. of Energy
• Patent Number(s): None
• OSTI ID: 6852077
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
ABSORPTION
AIR POLLUTION CONTROL
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
DENITRIFICATION
FLUE GAS
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
IRON COMPOUNDS
IRON OXIDES
MANAGEMENT
MANGANESE COMPOUNDS
MANGANESE OXIDES
MATERIALS RECOVERY
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
POWER PLANTS
PROCESSING
RECOVERY
SODIUM CARBONATES
SODIUM COMPOUNDS
THERMAL POWER PLANTS
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES