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International Journal of Energy for a Clean Environment

Publicado 8 números por año

ISSN Imprimir: 2150-3621

ISSN En Línea: 2150-363X

SJR: 0.597 SNIP: 1.456 CiteScore™:: 3.7 H-Index: 18

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A NEW ROUTE OF HCN FORMATION VIA N2O IN GASEOUS HYDROCARBON FLAMES

Volumen 5, Edición 3, 2004, 13 pages
DOI: 10.1615/InterJEnerCleanEnv.v5.i3.80
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SINOPSIS

The formation of HCN in flames via N2O reactions with CHi radicals proposed by Gradon (2001) and elaborated later (Tomeczek and Gradon, 2003) into a form of elementary step reactions is tested for rich and lean gaseous premixed CH4/air flames. The new route to HCN is thermodynamically more probable than the Fenimore direct reactions of N2 with CHi radicals. To meet the observed NO formation rates, a set of six reactions is proposed:

N2O + CH3 ⇔ CH2NH + NO,

N2O + CH3 ⇔ CH3O + N2,

CH2NH + H ⇔ H2CN + H2,

CH2NH + O ⇔ H2CN + OH,

H2CN + H ⇔ HCN + H2,

H2CN + O ⇔ HCN + OH.

It has been shown that in rich CH4/air flames, the new mechanism of HCN formation via N2O contributes to about 25% of NO, in comparison with the 17% contribution of the Fenimore mechanism.

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