Development of a reduced multi-component chemical kinetic mechanism for the combustion modelling of diesel-biodiesel-gasoline mixtures

• A 5-component reduced mechanism for diesel-biodiesel-gasoline blends is proposed. Multiple DRG, DRGEP and FSSA methods are applied on the detailed mechanisms. Cross-reactions Arrhenius parameters optimisation techniques analysed. Reduced multicomponent mechanisms validated against literature data. Multicomponent accurately replicates ignition-related characteristics. In this study, a compact combined reaction mixtures (CDBG) developed, comprising n-heptane, methyl butanoate (MB) decanoate (MD) as well toluene isooctane to represent combustion characteristics of diesel, biodiesel gasoline fuels, respectively. The separately prior combining by means directed relation graph (DRG), graphs with error propagation (DRGEP) full species sensitivity analysis (FSSA). then combined, extensive validations carried out closed homogenous reactor application under following conditions: T = 600–1700 K, P 1–50 atm, equivalence ratios (Φ) 0.25–1.5 (156 setups in total). To boost accuracy CDBG mechanism, cross-reaction performed identify important intermediate reactions. identified reactions subsequently integrated into resulting significant improvements ID timings up 30%, 18% 16% sub-mechanisms gasoline, addition, rate constant also employed further improve ignition behaviour proposed kinetic mechanism. results revealed that dual implementation diminished maximum associated errors considerably, down 14.6%, 16.9% 14.9% Concisely, best achieved at K were 41 atm Φ=1, 1,4 50 bar Φ=0.3 surrogates,