There exist inorganic fuels, but I don’t think any portable flamethrower is capable of using them.
Couldn’t you… use basically moonshine?
Like, set up a distillery, get your grain mash and sugar… now you have very high proof alcohol.
Now, you could just strap basically a pilot light to … a more seriously designed super soaker… and you’d have to add some kind of … jellying, gelling? agent to the moonshine to get it to act more like a flame thrower than a squirt gun…
This would not be a 100% organicly sourced entire flamethrower, but you could at least make the fuel mostly, if not fully, from organic, non petroleum products.
Petroleum is organic already. No need to make alcohol.
(Well, to a very high extent. It also has inorganic impurities.)
Ah, I was using the uh… food industry sense of the term (which is admittedly a fuzzy definition), not the chemistry definition.
Yay for domain dependent meanings!
