The Army is currently testing 50:50 blends of Fischer-Tropsch synthetic paraffinic kerosene and hydrotreated renewable jet with JP-8 for use in all Army ground systems and field generators, with the goal of certifying these fuels by 2014.
The Navy has tested HEFA 50:50 biofuel blends (also known as hydrotreated renewable jet [HRJ]) for use in all manned and unmanned aircraft.
"We're looking for the ideal plant oils--and the ways to produce them--for making hydrotreated renewable jet fuel," Isbell says, who works in the ARS Bio-Oils Research Unit at the National Center for Agricultural Utilization Research in Peoria, Illinois.
"From start to finish, we want to provide the information that industry and agriculture will need to support hydrotreated renewable jet fuel production," Isbell says.
The term hydrotreated renewable jet
fuel (HRJ)--sometimes also called synjet--can refer to fuels produced using a variety of processes.
Meanwhile, efforts to flight test a second variety of fuel, called hydrotreated renewable jet
, or HRJ, continues.
Fuels from the Fischer-Tropsch process so impressed the USAF that hydrotreated renewable jet
(HRJ) fuels are likely to have an easier passage, with HRJ testing set to take place on only three "pathfinder" airframes.
The biofuel in the blend was a hydrotreated renewable jet
fuel made from camelina, a non-food plant.
The next step for AFRL and other agencies is to certify other synthetic fuel production processes starting with hydrotreated renewable jet
fuel, which can be made from various feed stocks including waste animal fat from food companies, or other non-edible bio-oils.
Several airlines, including Continental and Japan Airlines, have begun to explore hydrotreated renewable jet
ASTM International ASTM International is balloting the 160 members of its aviation fuels subcommittee over a proposed standard for 50% blends of hydrotreated renewable jet
fuel made from animal fats or a variety of plant oils in advance of its 27 June-1 July meeting.