N sub 2 O formation from advanced NO sub x control processes (selective non-catalytic reduction and coal reburning)

Technical Report · Mon Apr 01 04:00:00 EST 1991

OSTI ID:5262278

Montgomery, T A; Martz, T D; Quartucy, G C; Muzio, L J ^[1]; Sheldon, M S; Cole, J A; Kramlich, J C ^[2]; Samuelsen, G S; Reddy, V ^[3]

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1. Fossil Energy Research Corp., Laguna Hills, CA (United States)
2. Energy and Environmental Research Corp., Irvine, CA (United States)
3. California Univ., Irvine, CA (United States)

The current work addressed the potential of N{sub 2}O production from two NO{sub x} reduction techniques: selective non-catalytic NO{sub x} reduction (SNCR processes) and reburning with pulverized coal. The effects of SNCR processes (utilizing ammonia, urea, and cyanuric acid injection) and reburning processes (with bituminous and lignite coals) upon NO{sub x} and N{sub 2}O levels were evaluated. Pilot scale testing and chemical kinetic modeling were used to characterize the N{sub 2} production from SNCR processes over a range of process parameters. The data show that the evaluated SNCR processes (ammonia, urea, and cyanuric acid injection) produced some N{sub 2}O as a by-product. Ammonia injection produced the lowest levels of N{sub 2}O; less than 4% of the reduced NO{sub x} was converted to N{sub 2}O. Cyanuric acid injection produced the highest levels; N{sub 2}O increases ranged between 12--40% of the reduced NO{sub x}. The conversion of NO{sub x} to N{sub 2}O with urea injection ranged from 7--25%. Pilot scale testing was used to characterize the N{sub 2}O production from reburning processes with coal over a range of process parameters. Parameters included: coal type, firing rate, initial NO level, and reburn zone stoichiometry. Data show that N{sub 2}O is not a major product during coal reburning processes for NO{sub x} reduction. 56 figs., 13 tabs.

• Research Organization: Fossil Energy Research Corp., Laguna Hills, CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-88PC88943
• OSTI ID: 5262278
• Report Number(s): DOE/PC/88943-T3; ON: DE91018259
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
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& Peat-- Waste Management
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AIR POLLUTION ABATEMENT
AMIDES
AMMONIA
CARBONACEOUS MATERIALS
CARBONIC ACID DERIVATIVES
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
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DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDRIDES
HYDROGEN COMPOUNDS
MATERIALS
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NITROGEN HYDRIDES
NITROGEN OXIDES
NITROUS OXIDE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
PROGRESS REPORT
REDUCTION
THERMOCHEMICAL PROCESSES
UREA
YIELDS