Autoignition controlled

This last inflammability parameter presents problems. After stating its definition it will be seen that measuring autoignition temperature proves to be a difficult exercise because its measurement is sensitive to the experimental conditions, even more sensitive than for flashpoints. Worse, this parameter seems to be controlled by kinetic factors far more complex to master than the thermodynamic factors that probably control flashpoints (in fact it is a liquid/vapour equilibrium). So whilst the influence of the nature of the cup metal on a flashpoint has never been demonstrated, this demonstration was easily made with autoignition temperatures. 

Isooctylnitrate cetane improvers effectively boost the cetane number by aiding in the autoignition of fuel, thus controlling ignition delay. Some typical guidelines which can be used to anticipate cetane improver performance are listed below ... 

Ignition delay between injection of fuel and autoignition can be controlled by engine design, fuel and air temperature, fuel atomization, and fuel composition. The ignition delay period is typically shorter than the fuel injection period. The effect of temperature on ignition delay is shown in FIGURE 4-10. 

Differences in stability among hydroperoxides are probably not controlling. Moreover, the reactions immediately preceding autoignition probably involve simple entities formed in the combustion of all hydrocarbons and are only indirectly affected by structure. 

Modem Aspects of Diffusion-Controlled Reactions Low-temperature Combustion and Autoignition Photokinetics Theoretical Fundamentals and Applications Applications of Kinetic Modelling Kinetics of Homogeneous Multistep Reactions Unimolecular Kinetics, Part 1. The Reaction Step Kinetics of Multistep Reactions, 2nd Edition... 

Modern Aspects of Diffusion-Controlled Reactions Low-temperature Combustion and Autoignition... 

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