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The autoignition temperature or self-ignition temperature, often called spontaneous ignition temperature or minimum ignition temperature (or shortly ignition temperature) and formerly also known as kindling point, of a substance is the lowest temperature at which it spontaneously ignites in a normal atmosphere without an external source of ignition, such as a flame or spark. [1]
Crude oil must first be desalted, by heating to a temperature of 100-150 °C and mixing with 4-10% fresh water to dilute the salt. Crude oil exits from the desalter at a temperature of 250 °C–260 °C and is further heated by a tube-still heater to a temperature of 350 °C–360 °C.
Sunflower oil, high oleic: Refined: 232 °C: 450 °F [3] Sunflower oil, high oleic: Unrefined: 160 °C: 320 °F [3] Vegetable oil blend: Refined: 220 °C [13] 428 °F
The flash point of a material is the "lowest liquid temperature at which, under certain standardized conditions, a liquid gives off vapours in a quantity such as to be capable of forming an ignitable vapour/air mixture". [1] The flash point is sometimes confused with the autoignition temperature, the temperature that causes spontaneous ignition.
Considerably above the temperature of the smoke point is the flash point, the point at which the vapours from the oil can ignite in air, given an ignition source. The following table presents smoke points of various fats and oils.
The fire point, or combustion point, of a fuel is the lowest temperature at which the liquid fuel will continue to burn for at least five seconds after ignition by an open flame of standard dimension. [1] At the flash point, a lower temperature, a substance will ignite briefly, but vapour might not be produced at a rate to sustain the fire ...
Autoignition temperature Lower Upper Acetaldehyde: 4.0 57.0 IA −39 °C 0.37 175 °C Acetic acid (glacial) 4 19.9 II 39–43 °C 463 °C Acetic anhydride: II 54 °C Acetone: 2.6–3 12.8–13 IB −17 °C 1.15 @ 4.5% 465 °C, 485 °C [5] Acetonitrile: IB 2 °C 524 °C Acetyl chloride: 7.3 19 IB 5 °C 390 °C Acetylene: 2.5 100 [6] IA Flammable gas
Autoignition temperature. 470 °C (878 °F; 743 K) Explosive limits ... [11] Propane was found dissolved in Pennsylvanian light crude oil by Edmund Ronalds in 1864 ...