Mass-spectrometric tracer and photometric studies of catalysed radical recombination in flames
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 71, 149-160
- https://doi.org/10.1039/f19757100149
Abstract
Measurements of hydrogen atom concentrations in H2+ O2+ N2 flames with and without additives have been made by a mass-spectrometric tracer method dependent upon the reaction Sr++ H2O ⇌ SrOH++ H, K= 47 exp(–7 700 K/T), being balanced and by a well established photometric method dependent upon balance of the analogous reaction Li + H2O ⇌ LiOH + H, K= 16 exp(–10 000 K/T). Results from the two methods agree well. Catalysis of flame radical recombination caused by addition of tin, molybdenum and tungsten is described. Mass-spectrometric results for tin are in good agreement with previous photometric measurements. Results for molybdenum and tungsten from both methods are quantitatively interpreted in terms of a cyclic homogeneous gas phase mechanism, with associated thermochemistry and reaction rate coefficients.Keywords
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