Hydroxyl concentrations in rich hydrogen-air flames held on porous burners
✍ Scribed by W.E. Kaskan
- Publisher
- Elsevier Science
- Year
- 1958
- Tongue
- English
- Weight
- 739 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0010-2180
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✦ Synopsis
Burners
Cooled porous metal burners are shown to have great advantages /or the study o/ chemical kinetics in fames and flame gases. A method is described for determining quantitatively the concentration of the OH radical in flame gases and measurements are reported for rich hydrogen-air flames. The OH concentrations near the flame are shown to be always in considerable excess of the calculated equilibrium concentrations. These excess concentrations decay in a manner which can be explained by assuming that the reaction OH+He\ "H.,O+H is/ast in both directions so that the OH/H ratio is always the equilibrium ratio. Both radicals then decay by the three body recombinations of H with itself and with OH to /orm H., and H..,O. It is shown that for' the slower flames the diffusion of the radicals can lead to erroneous results.