[4] On March 16, 2004, the company was reported shipping the first load of diesel from its gas-to-liquids demonstration plant at the Port of Catoosa near Tulsa to the Massachusetts Institute of Technology for testing by the Department of Energy[5].
Syntroleum worked with the U. S. Air Force to flight-test a synthetic jet fuel blend.
On December 15, 2006, a B-52 took off from Edwards AFB for the first time powered solely by a 50–50 blend of JP-8 and Syntroleum's FT fuel.
The facility at Geismar, Louisiana, completed in 2010, was the first large scale renewable diesel biorefinery built in the U.S.[8] The Dynamic Fuels JV represented a significant shift in corporate direction away from GTL technology and was accompanied by restructuring, leading to Kenneth Agee departing the company and buying Syntroleum’s research and laboratory facilities at Tulsa[9] to form a new company Emerging Fuels Technology, also employing several former Syntroleum staff.
It was announced in December 2013 that Syntroleum's operations would be sold to Renewable Energy Group (REG) Inc. of Ames, Iowa.