Process for reduction of oxides of nitrogen

Patent · Tue Sep 20 04:00:00 EDT 1983

OSTI ID:5674909

McGill, E C; Bell, R D

An improved process for reducing the concentration of oxides of nitrogen (NO /SUB x/ ) in a waste stream is provided wherein an effluent stream containing oxides of nitrogen (NO /SUB x/ ) is burned at a temperature greater than about 2000/sup 0/ F. and less than about 3000/sup 0/ F. with an effective amount of an oxygen containing gas and a stoichiometric excess of a hydrocarbon, based on the total amount of available oxygen, to provide a combustion effluent. The combustion effluent is thereafter contacted, at a temperature in the range of from about 1600/sup 0/ F. to about 1800/sup 0/ F., with an effective amount of a gaseous stream containing less than 21 volume percent oxygen to substantially oxidize all combustibles present in the combustion effluent and provide an oxidation effluent substantially free of oxides or nitrogen (NO /SUB x/ ) and combustibles. The oxidation effluent may be cooled in heat exchange equipment to recover energy, recycled to support the combustion and/or the oxidation of the combustibles, or vented to the atmosphere.

• Assignee: McGill Inc.
• Patent Number(s): US 4405587
• OSTI ID: 5674909
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
DENITRIFICATION
ECOLOGICAL CONCENTRATION
ELEMENTS
ENERGY RECOVERY
GASEOUS WASTES
HEAT EXCHANGERS
HYDROCARBONS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
RECOVERY
THERMOCHEMICAL PROCESSES
WASTES