Lufthansa's Testing Supported by the European Commission

ENGLEWOOD, Colo., April 22, 2014 -- Gevo, Inc.

(Nasdaq:GEVO), the world's only commercial producer of renewable isobutanol,
announced today that it has come to an agreement with Lufthansa to evaluate
Gevo's renewable jet fuel with the goal of approving Gevo's alcohol-to-jet
fuel (ATJ) for commercial aviation use.

Lufthansa's testing is being supported through work with the European
Commission.

"ATJ, like the Fischer-Tropsch pathway, has the potential to use
lignocellulosic waste as feedstock, but promises to do so at less cost than
Fischer-Tropsch," said Alexander Zschocke, Lufthansa Group Senior Manager
Aviation Biofuels. Lufthansa is a leader in the marketplace for alternative
fuels.

"By using isobutanol as a renewable raw material for producing jet fuel, the
resulting jet fuel has the mixtures of molecules typical of petro-based jet
fuel making it directly compatible with engines and infrastructure.
Renewable jet embodies the potential of cleaner, greener, and as we scale
up, cost competitive drop-in fuels," said Patrick Gruber, Gevo's chief
executive officer. "We greatly appreciate Lufthansa's and the European
Commission's support of this effort.

Through initiatives like this, the commercial airlines are seeking to prove
out ATJ and move it towards commercialization. ATJ from Gevo's isobutanol is
a clean burning, homegrown, drop-in jet fuel, and we have a potential route
to deliver aviation biofuels at scale and at competitive cost."

Gevo's patented ATJ fuel is truly a drop-in fuel, designed to be fully
compliant with aviation fuel specifications and provide equal performance,
including fit-for-purpose properties.

About Gevo

Gevo is a leading renewable chemicals and next-generation biofuels company.
Gevo's patent-protected, capital-light business model converts existing
ethanol plants into bio-refineries to make isobutanol. This versatile
chemical can be directly integrated into existing chemical and fuel products
to deliver environmental and economic benefits. Gevo has executed initial
commercial-scale production runs at its isobutanol facility in Luverne,
Minn., constructed in conjunction with ICM, a leading provider of
proprietary ethanol process technology, and has a marquee list of partners
including The Coca-Cola Company, Sasol Chemical Industries, and LANXESS,
Inc., an affiliate of LANXESS Corporation, among others. Gevo is committed
to a sustainable bio-based economy that meets society's needs for plentiful
food and clean air and water. For more information, visit www.gevo.com.