Combined catalytic/non-catalytic process for nitrogen oxides reduction

Patent · Tue Dec 18 04:00:00 EST 1990

OSTI ID:5649617

Hofmann, J E; Sun, W H; Luftglass, B K

This patent describes a process for the reduction of nitrogen oxides in the effluent form the combustion of a carbonaceous fuel. It comprises introducing a nitrogenous treatment agent into the effluent at an effluent temperature between about 1200{degrees}F and about 2100{degrees}F and a molar ratio of treatment agent nitrogen to baseline nitrogen oxides level of about 1:10 to about 10:1 and contacting the treated effluent under conditions effective to reduce the nitrogen oxides in the effluent with a catalyst effective for the reduction of nitrogen oxides in the presence of ammonia.

• Assignee: Fuel Tech, Inc., Stamford, CT (USA)
• Patent Number(s): US 4978514; A
• Application Number: PPN: US 7-408122
• OSTI ID: 5649617
• Country of Publication: United States
• Language: English

Related Subjects

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010800* -- Coal
Lignite
& Peat-- Waste Management
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54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ADDITIVES
AIR POLLUTION CONTROL
AMMONIA
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
CONTROL
DENITRIFICATION
ENERGY SOURCES
FLUE GAS
FOSSIL FUELS
FUELS
GASEOUS WASTES
HYDRIDES
HYDROGEN COMPOUNDS
MATERIALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
REDUCTION
REMOVAL
THERMOCHEMICAL PROCESSES
WASTES