A new sustainable aviation fuel developed by US research and engineering company Applied Research Associates (ARA) and Chevron Lummus Global (CLG) has been approved by international standards organisation ASTM International.

The new production pathway, called ‘catalytic hydrothermolysis jet’ (CHJ), was approved on 15 December and published in the revised ASTM specification for ‘Aviation Turbine Fuel Containing Synthesised Hydrocarbons’ on 29 January.

“Commercial volumes of competitively priced aviation fuel are in demand … and the approval of the CHJ pathway adds another great option,” said ARA vice president of fuels development Chuck Red.

ASTM approval will allow the blending of up to 50% of ARA and CLG’s ReadiJet fuel with petroleum-derived jet fuel.

ARA said ReadiJet was produced via the two companies’ Biofuels Isoconversion process, which utilised hyrdrothermal conversion and hydrotreating technology to convert waste fats, oils and greases into jet fuel.

“The Biofuels Isoconversion technology is now set for scale-up in the USA and Japan,” ARA said. “In the USA, multiple commercial projects are in engineering and Euglena Corporation is working to start up its integrated Biofuels Isoconversion demonstration facility in Japan with the aim of delivering CHJ for commercial flights during the 2020 Olympic Games in Tokyo.”

CLG – a joint venture between energy corporation Chevron USA and multinational engineering firm McDermott International – will act as the single point of contact for licensing and engineering of Biofuels Isoconversion.