Some Features of Kinetic Mechanisms of Gaseous Combustion

Chapter
First Online:
Part of the Heat and Mass Transfer book series (HMT)

Abstract

The approximate analytical method was applied for analysis of the problem on a local chain-thermal explosion in the reaction of hydrogen oxidation in the presence of chemically active additive. It was experimentally revealed that the methane combustion inhibitor tetrachloromethane shows no effect on the lower ignition limit of hydrogen combustion.  It is established that small amounts (~10-1 %) of chromium hexacarbonyl promote combustion of 2H2 + O2 mixture, which manifests itself in the increase in the propagation velocity of the flame, thus inhibition of oxidation of isobutene by this additive takes place. Therefore, the role of hydrogen atoms in hydrocarbon oxidation is not significant and may result at least in participating in longer reaction chains than in hydrogen oxidation. It means also that the kinetic mechanism of inhibiting combustion of hydrocarbons by metal carbonyls suggested in the literature based on accounting for termination of hydrogen atoms should be refined.

Keywords

Chain-thermal explosion Metal carbonyls Inhibitor Promoter Flame propagation Speed color cinematography Lower ignition limit Critical condition Chemically active additive 
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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Russian Academy of SciencesInstitute of Structural Macrokinetics and Materials ScienceMoscowRussia

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