Two Simple Models for the Noncatalytic Reduction of NO with NH3

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Title Two Simple Models for the Noncatalytic Reduction of NO with NH3
Creator de Boer, P. C. T.
Publisher Digitized by J. Willard Marriott Library, University of Utah
Date 1984
Spatial Coverage Tulsa, Oklahoma
Abstract A detailed investigation is made of two simple models for the noncatalytic reduction of NO by NH3 in oxygen-rich postflame gases (the "Thermal DeNOx" process). The first model is that proposed by Seery and Zabielski, and by Fenimore. It is based on the reactions (1) NH2 + NO -+ N2 + H20; (2) NH2 * OH -» -> NO; and (3) NH3 + OH -> NH2 + H20. As noted previously by Fenimore, reactions (1) and (2) lead to the existence of a critical concentration CN03C, below which CN03 cannot be reduced. The nondimensionalized rate equations for reactions (l)-(3) are solved analytically for the case of constant OHconcentration. The solution is compared with the experimental data of Muzio, Arand and Teixeira; it is found that the corresponding OH-concentrations are well below their equilibrium values. This is taken into account in an extended model, where the replenishment of OH is rate-limiting. The results of the extended model can be fitted quite well to available experimental data. The model is applied to conditions typical of gas turbine Combustors.
Type Text
Format application/pdf
Language eng
Rights This material may be protected by copyright. Permission required for use in any form. For further information please contact the American Flame Research Committee.
Conversion Specifications Original scanned with Canon EOS-1Ds Mark II, 16.7 megapixel digital camera and saved as 400 ppi uncompressed TIFF, 16 bit depth.
Scanning Technician Cliodhna Davis
ARK ark:/87278/s69w0j1b
Setname uu_afrc
ID 1537
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