Convective recirculation effect on the selective non-catalytic reduction behavior in an industrial furnace

Abstract Selective non-catalytic reduction (SNCR) has become an important technique for reducing NOx emissions in industrial furnaces. The occurrence of convective recirculation can cause significant changes in SNCR performance. This paper presents the results of a study performed by Computational F...

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Bibliographic Details
Published inBrazilian journal of chemical engineering Vol. 34; no. 4; pp. 1011 - 1021
Main Authors Oliveira, F. C. L., Martignoni, W. P., Souza, E., Pereira, L.G., Santos, L.S., Prata, D.M., Monteiro, L.P.C.
Format Journal Article
LanguageEnglish
Portuguese
Published Brazilian Society of Chemical Engineering 01.10.2017
Subjects
ENGINEERING, CHEMICAL
industrial furnaces
ammonia
SNCR
NOX
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Summary:Abstract Selective non-catalytic reduction (SNCR) has become an important technique for reducing NOx emissions in industrial furnaces. The occurrence of convective recirculation can cause significant changes in SNCR performance. This paper presents the results of a study performed by Computational Fluid Dynamics (CFD) considering: (i) changes of initial NOX; (ii) injection plan and (iii) NH3/NO molar ratio. The simulations have demonstrated that the convective recirculation (resultant from different injection plans and high temperature gradients) of flue gas assumes a role of vital importance for performance analysis of existing plants and the potential NOX reduction in furnaces during the design phase.
ISSN:0104-6632
1678-4383
1678-4383
DOI:10.1590/0104-6632.20170344s20150420