autoignition/flash points of a blended gas

[pippo]

How can you have 2 hydrocarbons, one propane, other is isobutane, both have a autoignition temp of < 1000 deg F, and when combined, the AI temp becomes higher- about 1600 deg F? There has to be an additive, right?

 

Any way to predict AI temps? Any physical chemists/engineers here?

 

Thanks!

Edited November 24, 2011 by pippo

[pippo]

How can you have 2 hydrocarbons, one propane, other is isobutane, both have a autoignition temp of < 1000 deg F, and when combined, the AI temp becomes higher- about 1600 deg F? There has to be an additive, right?

 

Any way to predict AI temps? Any physical chemists/engineers here?

 

Thanks!

 

This is a challenge. Just had a thought- maybe in the Handbook of Physics and Engineering? Time to find this in there.........I will report back if I have any luck.