autoignition temperature

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autoignition temperature

The minimum temperature needed for self-sustained combustion in absence of a spark or flame, at which the vapours from a volatile liquid will ignite spontaneously.

The autoignition temperature (AT) is of interest to the Occupational Safety and Health Administration (OSHA) (US), which lists ATs in its Materials Safety Data Sheets, see there.
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References in periodicals archive ?
The efficient combustion of blends ERO5-7.5 under heavy load and at a high speed of 2200 [min.sup.-1] can be affected by a low cetane number of ethanol, its high latent heat for evaporation (910 kJ/kg) and auto-ignition temperature (420[degrees]C).
In contrast to ethanol, petrol demonstrates advantages linked with its threefold higher cetane number, lower auto-ignition temperature (300[degrees]C) and a calorific value better by 62.5% that in the case of using blends PRO2.5-5 translates into bmep higher by 5.6-2.7% relative to baseline parameters.
* Specifying a minimum grease auto-ignition temperature for cooking oil of 685[degrees]F (363[degrees]C).
It was also found that the auto-ignition temperature of the oil correlates with preignition [70].
Properties Diesel Acetone Butanol Molecular formula C12-C25 C3H60 C4H90H Cetane number >40 25 Oxygen content (wt %) 27.59 21.62 Density at 288 K (g/mL) 0.82-0.86 0.791 0.813 Auto-ignition temperature (K) 503 833 658 Lower heating value (MJ/kg) 42.7 29.6 33.1 Boiling point (K) 555-561 329.2 390.8 Stoichiometric ratio 14.3 9.54 11.21 Latent heat at 298 K (kJ/kg) 270 518 582 Flammability limits (vol.
But since auto-ignition temperatures are relatively low, it's difficult keeping a hot, compressed mixture from lighting off prematurely.