Kinetic Mechanism of Ignition of Propane–Butane Mixtures at Low and High Temperatures: Development and Application

A kinetic model for the ignition and combustion of mixtures of propane and n -butane in air has been developed. The model contains 348 reactions involving 72 species and includes both high and low-temperature mechanisms of oxidation of propane and n -butane. The kinetic model was tested against experimental data on the ignition delay time and laminar flame speed. The model provides a good fit to experimental data on propane ignition and the laminar flame speed in propane–air mixtures, the ignition of n -butane under different initial conditions ( K, atm, ), the laminar flame speed in mixtures of n -butane with air at K, atm and different stoichiometric ratios ( ), and the ignition of stoichiometric C 3 H 8 /C 4 H 10 /N 2 /Ar mixtures with different ratios of C 3 H 8 /C 4 H 10 at K and atm. The developed kinetic mechanism was used to perform a demonstration numerical simulation of the combustion of propane–butane fuel in a homogeneous combustor.