Methane, Ethane, Propane, Butane, Pentane and Hexane
If someone asked which one has very low Autoignition temperature from above list then it will difficult to predict as we can’t remember each one of its #AIT but here is the trick in case of #hydrocarbons
1.The higher the carbon to hydrogen ratio the lower the Auto ignition temperature and vice versa. So according to that #hexane has very low AIT – 230℃.
2.With an increase in pressure the autoignition temperature decreases. This is particularly important from a #safety point of view when hydrocarbons are compressed.
3.The autoignition temperature is also higher for branched-chain hydrocarbons than for straight-chain hydrocarbons.
We can’t predict the value but this will help in #troubleshooting and #processdesign