Structural Analysis of Combustion Mechanisms

Abstract

39 detailed mechanisms for combustion of hydrogen, carbon monoxide and methanol are investigated using ReactionKinetics, a Mathematica based package. The obtained results in most cases do not depend on the choice of reaction rate coefficients, the methods only use the underlying sets of reaction steps, thus the results are robust and general in a certain sense. These investigations can be used before or in parallel with usual numerical investigations, such as pathway analysis, sensitivity analysis, parameter estimation or simulation. The considered hydrogen mechanisms shared 90% of common reaction steps. The CO combustion mechanisms show a larger variety both in species and in reaction steps. There exist only a few methanol combustion mechanisms; the big differences between them shows that the modelling community is only at the very beginning of exploring this process. The package and the methods may be useful for automatic mechanism generations, testing, comparing and reduction of mechanisms as well, especially in the case of large systems.