Author:
Díaz-González M,Prince J C,Castellanos-Onorio O
Abstract
Abstract
This research presents the study of heat release in the iso-butanol ignition process at temperatures T < 900 K, applying low-temperature chemistry and starting from a proposed kinetic scheme of 12 elementary reaction stages. A numerical analysis of the thermal energy release available for ignition is developed, where the formation of aldehydes is important in this combustion phenomenon. The low temperature kinetics for this alcohol were found to be unable to maintain the reactivity of the system. The OHs generated by low temperature chemistry react mainly to produce iso-butanal aldehyde instead of consuming the main fuel which inhibits NTC (Negative Temperature Coefficient) behaviour. To maintain the reactivity of the system, the reaction pathways of hydrogen peroxide H2O2 (HO2→H2O2→OH) are added, obtaining a short kinetic mechanism of 14 reactions that generates a good fit for the experimental developments of ignition time at lower temperatures. of 1000 K.
Subject
General Physics and Astronomy
Reference22 articles.
1. Flame propagation of butanol isomers/air mixtures;Veloo;Proc Combust Inst,2011
2. Non-premixed ignition, laminar flame propagation, and mechanism reduction of n-butanol, iso-butanol, and methyl butanoate;Liu;Proc Combust Inst,2011
3. Experimental investigation of the laminar burning velocities of methanol, ethanol, n-propanol, and n-butanol at high pressure;Beeckmann;Fuel,2014
4. Autoignition of n-butanol at elevated pressure and low-to-intermediate temperature;Weber;Combust Flame,2011
5. Role of peroxy chemistry in the high-pressure ignition of n-butanol-experiments and detailed kinetic modelling;Vranckx;Combust Flame,2011