In this paper an analysis is given of the behaviour of excess radical concentrations, H, OH and 0 as a function o~ height above the reaction zone in pretnixed acetylene-air +flames at 2-200 Β° to 2400Β°K and I atmosphere pressure. 7['he intensity was measured o/ the Li resonance line which is related
Metal-additive-catalysed radical-recombination rates in flames
β Scribed by E.M. Bulewicz; P.J. Padley; D.H. Cotton; D.R. Jenkins
- Publisher
- Elsevier Science
- Year
- 1971
- Tongue
- English
- Weight
- 178 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Traces of the metals Mg, Ca, Sr, 3% Cr, MI, Sn, U have been shown to reduce excess free radicat conceotrations in Hz + 02 + N2 flames. This is the first characierised effect of n-et& additiws otl the chemfstry of the flame gases themeefves. The phenomenon has been satiisfactorily interpreted In terms of catalytic cycles involving metal oxide and hydroxides.
π SIMILAR VOLUMES
## Radicalrecombination rates have been measured in fuel-lean H2/02/N2 fhmesat temperatures up to 3130'K. The observed rnres cannot be accoan:ed for in terms of termolecular reactions such as H f OH + in! -. Hz0 + hl and the occunence of an additional recumbination route, H + 02 + hI 5 HO? + &I,
The rate constant for the recombination of trichloromethyl radicals has been measured in the gasphase photozhlori.lation of chloroform at 344.7OK. The observed value is IO9.62mole-Ilsec-I, much lower than the value -u-edicted by transition state calculations using Gorin's model.