Fuel
CleanJoule Seeks To Clear ASTM Bar for 100% Drop-in SAF
CycloSAF process is based on isolating cycloalkane hydrogen molecules
CleanJoule's CycloSAF process
CleanJoule has developed a new process for producing what it says will be a 100% drop-in replacement for jet-A fuel.

CleanJoule has begun the process of having its CycloSAF sustainable aviation fuel (SAF) meet ASTM International’s D4054 standard for blending with jet-A/A1 fuel. The Utah-based company, which announced the move this week, is aiming to start production of what it said will be a 100% drop-in fuel for aircraft in 2026.

According to CleanJoule, its synthetic blending component will deliver 10% greater energy density than jet-A and is made from a feedstock of waste biomass. Its process is based on increasing the proportion of cycloalkane hydrogen molecules in its SAF to eliminate the aromatics that cause contrails and boost energy density.