Effect of Temperature on Ignition Energy

An analytical expression [unpublished] describing this behavior is derived in A-6-1.5 

Eor example, a dust with MIE of 1000 mJ at 20°C has a predicted MIE of 21 mJ at r = 100°C. Based on the test results reviewed in [59] the effect of temperature on powder MIE might be major and should always be considered where powder is heated. 

This approach has not been tested for any dusts that bum heterogeneously such as some metal dusts (A-6-1.2). Also, this large an effect of temperature has not been found by some other workers, it has yet to be confirmed that the effect is not due in part to loss of moisture (6-1.6) or evolution of flammable gas (6-1.3), both of which can have large effects on MIE. 

---