The Formation of Nitric Oxide and the Detection of HCN in Premixed Hydrocarbon-Air Flames at 1 Atmosphere
Titel:
The Formation of Nitric Oxide and the Detection of HCN in Premixed Hydrocarbon-Air Flames at 1 Atmosphere
Auteur:
Bachmaier, F. Eberius, K. H. Just, Th.
Verschenen in:
Combustion science and technology
Paginering:
Jaargang 7 (1973) nr. 2 pagina's 77-84
Jaar:
1973-04-01
Inhoud:
The NO concentration profiles of premixed hydrocarbon-air flames were measured using probe sampling and ultraviolet absorption of NO. The flames were stabilized on a Meker-type burner of 7 cm diameter at a pressure of 1 atm. Investigated fuels were CH4, C2H5, C2H4, C2H2, C3H8, n-C4H10, n-C5H14, i-C8H18, C6H6, C6H12 and gasoline. The measurements show the formation of nitric oxide according to the Zeldovich mechanism [image omitted] with k1 = 5ยท1013 exp(-75400/RT) cm3/mol.sec in fuel lean flames. In fuel rich flames the NO formation due to the Zeldovich mechanism would require unreasonably high concentrations of O atoms and evidence is given for another way of NO formation in these flames. HCN has been found as an intermediate species and exceeds the NO concentration in very fuel rich flames.