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Method of reducing oxides of nitrogen concentration in regeneration zone flue gas

Patent ·
OSTI ID:6554420
A method for controlling the oxides of nitrogen concentration in the exit flue gas from the regeneration zone of a catalytic cracking unit employing carbon monoxide combustion promoters which comprises monitoring the oxides of nitrogen concentration in the exit flue gas and adjusting the concentration of combustion promoter present in the regeneration zone to maintain the oxides of nitrogen concentration below a predetermined limit.
Assignee:
Exxon Research And Engineering Co
Patent Number(s):
US 4235704
OSTI ID:
6554420
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020800* -- Petroleum-- Waste Management
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
CATALYTIC CRACKING
CHALCOGENIDES
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DENITRIFICATION
FLUE GAS
GASEOUS WASTES
INDUSTRIAL PLANTS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PETROLEUM REFINERIES
POLLUTION ABATEMENT
PYROLYSIS
THERMOCHEMICAL PROCESSES
WASTES