Auto-Ignition Temperature test

About Auto-Ignition Temperature test

The auto-ignition temperature (AIT) test is conducted to determine the lowest temperature at which a substance will produce hot-flame ignition in air at atmospheric pressure, without the aid of an external energy source such as spark or flame. It is the lowest temperature to which a combustible mixture must be raised, so that the rate of heat evolved by the exothermic oxidation reaction will overbalance the rate at which heat is lost to the surroundings and cause ignition.
The test is predominantly conducted on liquids, however gases and solids capable of full vaporisation can also be tested using the method below:
Working through a range of material concentrations, the material is injected into a heated, and thermal stabilised, 500 ml round bottom flask. Once an ignition temperature is observed the flask temperature is reduced, the material concentration varied until the AIT is established.

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Auto-Ignition Temperature test

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