Gevo reaches next stage of ASTM biojet fuel testing

Gevo, Inc. (NASDAQ: GEVO), a leading renewable chemicals and advanced biofuels company, announced June 22, 2011, that it presented positive test results from fit for purpose testing of the Company's biojet fuel to ASTM's alcohol-to-jet task force. The task force consists of technical experts from a wide stakeholder group including jet engine manufacturers, governmental bodies, fuel manufacturers, third party testing laboratories, academics and airframe manufacturers. Upon reviewing the results of the test, which was conducted by the Southwest Research Institute (SwRI) and the Air Force Research Lab, the task force had no objection to Gevo proceeding to jet engine testing, the next phase in the certification process. Full certification of Gevo's biojet fuel is expected in 2013.

 "This is an extremely important step forward in the stage-gate approval process," said Glenn Johnston, Vice President of Regulatory Affairs at Gevo. "We are gratified that our colleagues on the task force cleared us to move forward with our biojet fuel certification effort."

About Gevo

Gevo is converting existing ethanol plants into biorefineries to make renewable building block products for the chemical and fuel industries. The Company plans to convert renewable raw materials into isobutanol and renewable hydrocarbons that can be directly integrated on a "drop in" basis into existing chemical and fuel products to deliver environmental and economic benefits. Gevo is committed to a sustainable biobased economy that meets society's needs for plentiful food and clean air and water. For more information, visit www.gevo.com.