Licensing Cellulosic Biofuel Technology Today Coskata Accelerating to

Licensing Cellulosic Biofuel Technology Today Coskata: Accelerating to Commercialization Wes Bolsen CMO & VP, Government Affairs Coskata, Inc.

Coskata’s platform technology is progressing to commercialization Coskata has a 3 -step process platform for biomass to fuels and chemicals Can use 1. Biomass any Gasification sustainable biomass 2. Syngas Fermentation 3. Product Recovery • Produces ~400 liters of ethanol per dry ton of material • Feedstock flexible process enables rapid licensing and commercialization Coskata’s ethanol technology is ready for commercialization and licensing • First focus is Ethanol, but can selectively produce other fuels and chemicals • Secured US Department of Agriculture’s intent to fund the largest biofuel loan guarantee in US Government history 2

Coskata’s proprietary technology drives efficiency Ethanol Production Proprietary microorganisms convert syngas (CO and H 2) into ethanol. 6 CO + 3 H 2 O 6 H 2 + 2 CO 2 C 2 H 5 OH + 4 CO 2 C 2 H 5 OH + 3 H 2 O Each reaction is independent allowing for a range of H 2/CO ratios. Proprietary bioreactor designs enhance productivity. Advanced bioreactor at Lighthouse facility. 3 3

Feedstock flexibility is critical to commercialization Gasification + Enzymatic Catalytic Feedstock Flexibility No Yes Ethanol Specificity Yes No Yes ~55 -85 76 -89** ~100+ Yield* (gal/dry ton) * Best estimates from publicly available data ** Chemical catalysis yield estimate from 2012 NREL targets (76 for ethanol, 89 for all alcohols) Source: Press; DOE; Company reports 4 4

Coskata is ready for commercialization Currently Operating Under Development Horizon (2008) Lighthouse (2009) Flagship Integrated Processing Warrenville, Illinois Semi-Plant Demonstration Madison, Pennsylvania Commercial Production Boligee, Alabama § Integrated processing system with methane thermal reformer, multiple bioreactor designs, and distillation § Integrated biorefinery § Linear scale-up to commercial production § Will test multiple commercialscale bioreactor and separations designs § 55 MM Gallons / yr § Multiple gasifiers that process ~1700 dry tons/day of biomass 5 5

Coskata Integrated Biorefinery Operating: Now ready for full-scale facilities Coskata has: • Successfully scaled its cellulosic ethanol technology • Shown the process to be costcompetitive with gasoline from multiple feedstocks • Completed design for commercial scale facilities • Enabled commercialization through licensing model IT’S TIME TO START BUILDING! 6

Coskata’s partners support commercialization 7 7

Significant U. S. biomass resources are available Sandia estimates production of 90 billion gallons of ethanol per year by 2030. Source: Sandia National Labs, Feasibility, economics, and environmental impact of producing 90 billion gallons of ethanol per year by 2030 8 8

Ethanol-The Primary Renewable Liquid Fuel Perspective paper by Rathin Datta, Mark Maher, Coleman Jones, and Richard Brinker J. Chemical Technology and Biotechnology, 2011, 86: 473 -480, Society of Chemical Industry

Natural Efficiencies: Half the Carbon • The biofuel option most naturally compatible with biomass will have the highest yield from the least amount of feedstock, leading to greater efficiency, lower costs, and less greenhouse gas emissions. • Because of its molecular advantages, biomass-to-ethanol achieves the highest yields. • Requires at least half as much carbon as other biofuels, . • Makes the best use of the significant oxygen portion in the feedstock. Product Conversion equation Theoretical Yield Ethanol 3”CH 2 O” C 2 H 5 OH + CO 2 51% (90 to 98% of theoretical achieved in industrial carbohydrate fermentations) n-Butanol or iso-Butanol 6“CH 2 O” C 4 H 9 OH + 2 CO 2 + H 2 O 41% (55 to 60% of theoretical yields achieved in industrial scale ABE fermentations) Octane C 8 Hydrocarbon 13“CH 2 O” C 8 H 20 + 5 CO 2 + 3 H 2 O 29. 7% Typical Yields Achieved 46 to 50% 23 to 25% Not practiced industrially – wide mix of hydrocarbons and oxygenates produced

Major Conclusions 1) Biomass-to-ethanol has natural efficiencies. On a molecular level, ethanol is the fuel that is most compatible with biomass. • Ethanol requires at least half as much carbon as other biofuels • Cellulosic ethanol is the fuel that best utilizes the oxygen in the biomass • A ton of biomass converted to ethanol will have higher yields than other alternative biofuels, resulting in the lowest cost to the consumer, and less greenhouse gas emissions to the environment 2) Ethanol has a history of superior performance. A fabric of American transportation for over a century, ethanol has the proven longevity other fuels don’t. 3) Today’s cars are ready for ethanol. America’s cars are rapidly being developed to run on higher ethanol blends. The transition to electric vehicles will take decades. Ethanol is ready today. 4) Sufficient biomass exists to make an impact. America has sufficient biomass to supplant our dependence on foreign oil by 30%.

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