Certification
The rules for aviation fuels are strict. Need to do very thorough research. The big oil companies have done a lot on this subject.
Some refineries have been producing "biofuels" notably in the kero/diesel fraction which has caused concern IF residues enter aircraft tanks/lines. Biofuels promote fungal growth and can change burn times.
Your next step is to investigate the fuel regs. If the civil sector is non responsive (which is my guess) the military sector is the way forward. Notably the USA DoD could well be interested. Most standards in civil use are derived from military demand.