Alcohols to Hydrocarbons (ATH)Advanced Bioeconomy Leadership Conference6th Annual Aviation & Military Biofuels SummitWashington, D.C.

Friday March 13th 2015

Forward-Looking Statements

© 2013 Gevo, Inc. | 2

Certain statements within this presentation may constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements relate to a variety of matters, including but not limited to: the timing and costs associated with and the availability of capital for Gevo’s scheduled retrofits of existing ethanol production facilities, its future isobutanol production capacity, the timing associated with bringing such capacity online, the availability of additional production volumes to seed additional market opportunities, the expected applications of isobutanol, including its use to produce renewable paraxylene, PET, isobutanol-based fuel blends for use in small engines, and ATJ bio-jet, addressable markets, and market demand, Gevo’s ability to produce commercial quantities of isobutanol from cellulosic feedstocks, the suitability of Gevo’s iDGs™ for the animal feed market, the expected cost-competitiveness and relative performance attributes of isobutanol and the products derived from it, the strength of Gevo’s intellectual property position and other statements that are not purely statements of historical fact. These forward-looking statements are made on the basis of the current beliefs, expectations and assumptions of Gevo’s management and are subject to significant risks and uncertainty. All such forward-looking statements speak only as of the date they are made, and Gevo assumes no obligation to update or revise these statements, whether as a result of new information, future events or otherwise. Although Gevo believes that the expectations reflected in these forward-looking statements are reasonable, these statements involve many risks and uncertainties that may cause actual results to differ materially from what may be expressed or implied in these forward-looking statements. For a discussion of the risks and uncertainties that could cause actual results to differ from those expressed in these forward-looking statements, as well as risks relating to the business of the company in general, see the risk disclosures in Gevo’s Annual Report on Form 10-K for the year ended December 31, 2011, as amended, and in subsequent reports on Forms 10-Q and 8-K and other filings made with the Securities and Exchange Commission by Gevo.

This presentation is based on information that is generally available to the public and does not contain any material, non-public information. This presentation has been prepared solely for informational purposes and is neither an offer to purchase nor a solicitation of an offer to sell securities.

© 2015 Gevo, Inc. | 3Source: Adapted from Nexant

Benzene

Toluene

Xylenes

Aromatics

Unsaturated Polyesters

Polypropylene

Jet Fuel

Gasoline

Diesel

Natural Gas Steam Cracking Olefins

PyrolysisGasoline

meta-Xylene

para-Xylene

ortho-Xylene

Methyl Methacrylate

Toluene Diamine

Cyclohexane

Ethyl Benzene

Cumene

Acrylonitrile

Propylene Oxide

Isobutene

Ethanol

alpha-Olefin

Polyols

Phenol

Acetone

Styrene

Adipic Acid

Caprolactam

Toluene Diisocyanate

Phthalic Anhydride

Isophthalic Acid

PTA

Ethylene Glycol

MTBE/ETBE

Polyesters(PET)

Plasticizers

Polyurethane

Nylon 6

Nylon 66

SB Latex

ABS

Polystyrene

Butadiene-Styrene

Polybutadiene

Polyacrylonitrile

Polyisobutylene

Polyester

Poly(vinyl cloride)

Polyethylene

Ethylene

Propylene

Butylenes

Butadiene

Vinyl Chloride

Crude Oil

Ethylene Oxide

EDC

Hydrocarbon Fuels

Naphtha

Chemicals and Materials

Renewable Building Block ApproachFrom EtOH and IBA most chemicals can be madeSimple chemistry to convert alcohols into key building blocks

Alcohols

Produced thousands of pounds purified by Sulzerand sold to TorayR&D work sponsored by Coca-Cola; supply discussions on going

Interest in bio-acetone from Brenntag Canada for solvents, pharmaceuticals and electronics applicationsLarge volume markets, such as feedstock for MMA

Lanxess produced butyl rubber from out IBAMajor JP chemical company has made bio-methylmethacrylate, supply/collaboration discussions ongoing

Produce bio propylene in the laboratoryNo commercial biobasedPP alternative todayDiscussion with strategicsfor PP are just beginning

ASTM Certification led by Gevo, expected 1H 2015Supplied to US Military and others for engine and flight testing.

Oligomerization technology can be used to produce a Renewable DieselEarly stageOptions for ETO products to allow for entrance into CNG market for diesel engines

Products, Partners, and Customers

Jet Fuel C8/Isooctane PX

Sales of both isooctane and isoocteneRed Bull Racing is using our Octane

Discussions with Major gas supplier for investment and H2 offtakeInterest appears strong in renewable hydrogen

Isobutylene

© 2015 Gevo, Inc. | 4

Diesel

AcetoneHydrogen

Propylene

IBA to Hydrocarbons

© 2015 Gevo, Inc. | 5

© 2015 Gevo, Inc. | 6

Process Flow

© 2015 Gevo, Inc. | 7

Isobutanol Isobutylene C8-C16 olefins

Dehydration

Oligom

erization

Hydrogenation

Fractionation

Isooctane

Jet

2-phaseseparator

Water

i-BuOH

Dehydrocyclization

Crystallization

PX

Flight

© 2013 Gevo, Inc. | 8

ASTM D4054

© 2012 Gevo, Inc. | 9

Standard Practice for Qualification and Approval of New Aviation Turbine Fuels and Fuel AdditivesSchematic of the overall qualification process for new fuels

Ethanol to Olefins (ETO)

© 2015 Gevo, Inc. | 10

Result of work on IBA to hydrocarbonsSeveral patents filedStrategic interestAttractive economicsMultiple business models

Breakthrough on Ethanol to Hydrocarbons and Chemicals

© 2015 Gevo, Inc. | 11

Ethanol

Isooctane

Jet Fuel

Acetone Propylene

Rubber

Diesel

Hydrogen Isobutylene

Catalytic Conversion

Typical Applications

Lubricants

ETO Makes a Flexible Mix of Valuable Products

Multiple patents filed

Chemical process, not biological

Makes Polymer Grade Propylene and High Purity Isobutylene

Process flexibility yields a flexible plant: change product mix by changing conditions

Source of renewable hydrogen

Change of process conditions leads to different product mixes in same capital base

© 2015 Gevo, Inc. | 12

Propylene

isobutylene Other

Hydrogen

Propylene

isobutylene

Other

Hydrogen

Pursuing offtake agreements for:– Jet

• Commercial• Military

– PX– Renewable Hydrogen– Other chemical products– Other fuel products

Line up strategic partners for investmentEstablish a business of converting Alcohols to Hydrocarbons (ATH)

What’s Next

© 2015 Gevo, Inc. | 13

Glenn JohnstonMain: 303-858-8358 x2281Direct: 720-267-8600gjohnston@gevo.com