In the lab in our steelworks one method of testing the carbon content involved collecting the CO2 from burning a sample in oxygen. The solute was benzene based. At the end of the day the chemists burned the waste. Usually in an outside rough ground area. Quite a volatile and inflammable liquid! Some “experimental” burning methods were tried, often spectacular.
The best I saw was getting the vapour to go boom! No boom until a flame/ spark was introduced then a decent flash/explosion.
Vapour in sufficient concentration+oxygen+plus spark was the combination.
Re the body fat content. A couple of technicians I knew did servicing of a crematorium oven. They had to clean some parts due to the build up of body fat products of combustion.
In the early days of Covid hand washing my knuckles used to get dry/crack. Moisturiser sorted it.
