Kinetics of NOx reduction by urea solution in a pilot scale reactor

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The effects of urea molar ratio (1.0 - 2.0), reaction temperature and additives on NO reduction in flue gas have be en determined ina pilot-scale flow reactor. A kinetic model is proposed for NO reduction rare with -NH and -CN in selective reducing agents (urea, cyanuric acid, ammonia). Two primary reactions can be expressed kinetically in the DeNO(x) profess as: N.S. (nitrogenous species) + O-x (oxidants)-->NO + ...(k(i); rate constant for NO formation) N.S. + NO-->N-2 + ... (k(r); rate constant for NO reduction) in which the rate constants of k(f) and k(r) in the model are determined from the experimental data in the temperature range 1173 K - 1373 Ii as: k(f) = 4.01 x 10(11) esp (-267/RT) k(r) = 7.24 x 10(10) exp (-230/RT) The proposed model can predict the lowered activation energies caused by the addition of different species and molar ratio to NO.
Publisher
Soc Chemical Eng Japan
Issue Date
1996
Language
English
Article Type
Article
Keywords

SELECTIVE NONCATALYTIC REDUCTION; NITRIC-OXIDE; AMMONIA; REMOVAL

Citation

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, v.29, no.4, pp.620 - 626

ISSN
0021-9592
URI
http://hdl.handle.net/10203/6165
Appears in Collection
CBE-Journal Papers(저널논문)
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