Development of advanced NO sub x control concepts for coal-fired utility boilers

Technical Report · Wed May 27 00:00:00 EDT 1992

DOI:https://doi.org/10.2172/7045954· OSTI ID:7045954

Evans, A; Newhall, J; England, G; Seeker, W R

CombiNO{sub x} is an integration of three technologies: modified reburning, promoted selective noncatalytic reduction (SNCR) and methanol injection. These technologies are combined to achieve high levels of NO{sub x}, emission reduction from coal fired power plants equipped with SO{sub 2} scrubbers. The first two steps, modified reburning and promoted SNCR are linked. It has been shown that, performance of the SNCR agent is dependent upon local oxidation of CO. Reburning is used to generate the optimum amount of CO to promote the SNCR agent, although lower levels of reburning are needed than are traditionally applied in the reburning process. If the reburn fuel is natural gas, the combination of reburning and SNCR may result in a significant cost savings over conventional reburning. The third step, injection of methanol into the flue gas, is used to convert NO to NO{sub 2} which may subsequently be removed in a wet scrubber.

• Research Organization: Energy and Environmental Research Corp., Irvine, CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-90PC90363
• OSTI ID: 7045954
• Report Number(s): DOE/PC/90363-T4; ON: DE92017921
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
54 ENVIRONMENTAL SCIENCES
FLUE GAS
DENITRIFICATION
METHANOL
INJECTION
NITROGEN OXIDES
AIR POLLUTION CONTROL
PROGRESS REPORT
REDUCTION
SCRUBBERS
STAGED COMBUSTION
ALCOHOLS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
CONTROL
DOCUMENT TYPES
EQUIPMENT
GASEOUS WASTES
HYDROXY COMPOUNDS
INTAKE
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
THERMOCHEMICAL PROCESSES
WASTES
010800* - Coal
Lignite
& Peat- Waste Management
014000 - Coal
Lignite
& Peat- Combustion
200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)