Comparação de mecanismos cinéticos reduzidos do metano para obtenção das concentrações das espécies

Abstract

This work presents the comparison of methane reduced kinetic mechanisms through the numerical simulation the concentration equations involved in the kinetic mechanism. Methane is the simplest of hydrocarbons, the methane mechanism consists of 300 elementary reactions and 30 species. For this, reduced kinetic mechanisms are preferred,because they reduce the rigidity of the system, the dimension, as a result, the computational time of processing and storage of the data needed for a numerical simulation. The species concentration were simulated using reduced mechanisms of one, two, three and four steps. This simulation was done through an algorithm written in C++ language. For this purpose, a review was realized of the fundamental concepts of chemical kinetics and basic equations used in the flame modeling. The ordinary differential equations were solved through the Euler’s method and the numerical results obtained are in agreement with the results of the reference. Understanding how the methane mechanism behaves may facilitate the performance of future works that have higher chain mechanisms.