Aether Fuels has produced synthetic aviation fuel meeting ASTM D7566 specifications in a fully integrated demonstration, hitting the certification benchmark that governs how Fischer-Tropsch synthetic kerosene enters the commercial jet fuel pool.

Independent testing by AmSpec confirmed the fuel samples comply with ASTM D7566 requirements for Fischer-Tropsch Synthesized Paraffinic Kerosene (FT-SPK). That specification allows qualifying FT-SPK to blend with conventional jet fuel at concentrations up to 50% without modifications to aircraft or airport fueling infrastructure.

The demonstration ran at RTI International in North Carolina. It linked Aether's 2.5-barrel-per-day Aurora Tri-Converter and Upgrader units with RTI's existing Fischer-Tropsch reactor. The integrated system converted renewable natural gas derived from Kentucky landfill gas, plus captured industrial carbon dioxide, into fully upgraded synthetic aviation fuel.

"This demonstration proves Aether's ability to scale up our integrated Aurora platform, take a feedstock through the complete end-to-end process, and produce on-spec synthetic aviation fuel," said Dhaval Shah, chief technology officer of Aether Fuels.

What does the demonstration prove?

The run marks a shift from component-level validation to end-to-end operation. Aether had previously tested its Tri-Converter technology only in standalone demonstrations, without pushing a feedstock through the complete conversion and upgrading chain to finished fuel.

CEO and co-founder Conor Madigan said the integrated demonstration follows earlier work validating individual components of the Aurora platform and scaling the technology in standalone units. The new data point: the full process, from landfill gas and captured CO2 to on-spec product, functions as designed at demonstration scale.

For a SAF developer, ASTM compliance is the gate to market. Fuel that does not meet D7566 cannot enter airline operations regardless of its carbon credentials. Aether has now cleared that bar at 2.5 barrels per day.

What comes next: Project Beacon

The engineering data from the North Carolina run will feed the design of Aether's planned Project Beacon facility in Singapore. That plant is designed to produce approximately 2,000 metric tons of SAF annually, equivalent to 50 barrels per day — a twentyfold scale-up from the demonstration unit.

Aether said the demonstration will inform the facility's design and reduce technical risks ahead of commercial deployment. Scale-up risk remains the central question for Fischer-Tropsch-based SAF pathways: many developers have produced on-spec fuel in the laboratory while struggling to finance and build commercial plants.

Aether is also developing additional commercial projects intended to produce ASTM-compliant SAF. The company projects that fuel from these facilities could achieve lifecycle greenhouse gas emissions reductions exceeding 70% compared with conventional fossil jet fuel — a claim grounded in the low-carbon feedstock mix of renewable natural gas and captured CO2, and one that will require verification at commercial scale.

Even at full build-out, Project Beacon's 2,000 tons per year is a fraction of global jet fuel demand, which exceeds 300 million tons annually. The facility's significance lies less in volume than in proving that Aether's integrated Aurora process can run continuously at commercial scale — the data gap that has stalled numerous synthetic fuel ventures.

With ASTM compliance demonstrated and independent lab confirmation in hand, Aether now faces the financing, construction and execution phase for Project Beacon in Singapore.