Influence of additives on selective noncatalytic reduction of NO with NH sub 3 in circulating fluidized bed boilers

Journal Article · Fri Nov 01 00:00:00 EST 1991 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00059a006· OSTI ID:5792394

Leckner, B; Karlsson, M ^[1]; Dam-Johansen, K; Weinell, C E ^[2]; Kilpinen, P; Hupa, M ^[3]

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1. Chalmers Univ. of Tech., Goeteborg (Sweden). Dept. of Energy Conversion
2. Dept. of Chemical Engineering, Technical Univ. of Denmark, Bygning 229, 2800 Lyngby (DK)
3. Dept. of Chemical Engineering, Abo Akademi Univ., 205 20 Turku (FI)

In this paper the application of selective noncatalytic reduction of nitric oxide with ammonia in circulating fluidized bed boilers is investigated. Special attention is directed to the use of additives to the ammonia so that the efficiency of the NO reduction at lower temperatures can be increased. Tests under realistic conditions in a research boiler and reaction kinetic calculations show that the type of additives used did not improve the process. On the other hand, it is shown that ammonia injection as such, when employed before the cyclone of the boiler, effectively reduces the NO emission to a level of 20-60 ppm, without significant negative effects such as ammonia bypass and an increased CO emission.

• OSTI ID: 5792394
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Vol. 30:11; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
54 ENVIRONMENTAL SCIENCES
AMMONIA
CHEMICAL REACTIONS
FLUIDIZED BED BOILERS
NITRIC OXIDE
REDUCTION
ADDITIVES
CARBON MONOXIDE
CIRCULATING SYSTEMS
EMISSION
INHIBITION
BOILERS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
HYDRIDES
HYDROGEN COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
014000* - Coal
Lignite
& Peat- Combustion
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)