Currently unable to use processed fuel from Krastorio2 in any of your burner machines.

propose an easy fix - In file /prototypes/entity.lua replace on lines 42, 182, 279
replace: fuel_category = "chemical",
with: fuel_categories = { "chemical", "vehicle-fuel", "processed-chemical" },

This is already fixed in version 0.1..8 that I am sitting on.
I did: fuel_categories = { "chemical", "vehicle-fuel" },
what is the benefit of adding "processed-chemical" to?

processed fuel is categorized as processed-chemical. It can already be used in other burner structures in Krastorio 2 as well as foundry from bz.

Did not realize processed fuel came from AAI. I am playing a SeaTorio + K2 + Space Exploration game and AAI is one of the dependencies. Thank you so much for supporting it!