%0 Journal Article %A Tomeczek, Jerzy %A Gradon, Boguslaw %D 2004 %I Begell House %N 3 %P 13 %R 10.1615/InterJEnerCleanEnv.v5.i3.80 %T A NEW ROUTE OF HCN FORMATION VIA N2O IN GASEOUS HYDROCARBON FLAMES %U https://www.dl.begellhouse.com/journals/6d18a859536a7b02,0f0a85106c5d34c3,3ebaeb2d746a8818.html %V 5 %X 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. %8 2004-10-15