ZeaChem is a venture-backed startup founded in 1998 that uses a cellulosic ethanol process to convert biomass into renewable fuels and chemicals. Their process involves gasifying biomass feedstock, producing hydrogen, and using fermentation and recovery steps to produce ethanol and other products. ZeaChem has demonstrated their technology at a lab scale and is working towards commercialization. Their process aims to address issues with traditional ethanol production such as poor economics, environmental performance, and competition with food production by using cellulosic biomass as a feedstock.

1. Entrepreneur Trek - Stanford March 21, 2009

6. Cellulosic Ethanol & One Approach to Solve the Problem at One Level

8. ZeaChem Process Flow Feedstock Ethanol Hydrogenolysis Fermentation + Recovery Gasification = H 2 Recovery + Energy Acetate Ester Hydrogen

9. How does it Fit into the Rest of the World? The Value Chain

10. Raw Material

11. The US sweetener industry

17. Biomass Yields Matter SOURCE: © Ceres, Inc. All Rights Reserved. Used with Permission. * graphic not to scale *

18. Is There Enough Land?

19. Technology Can Solve “Food vs. Fuel” Debate Technology will Provide ~10X Improvement in Land Productivity! Enables 30% Renewable Fuels from Current Lands ZeaChem + Auto Eff. 15 BDT/ac/yr 135 gal/BDT 25 mi/gal 50,625 mi/ac/yr 1 st Gen Cellulosic 7.5 BDT/ac/yr 90 gal/BDT 14 mi/gal 9,450 mi/ac/yr Farm Yield Factory Yield Auto Eff. Land Prod. Corn Ethanol 150 Bu/ac/yr 2.7 gal/bu 14 mi/gal 5,670 mi/ac/yr ZeaChem 15 BDT/ac/yr 135 gal/BDT 14 mi/gal 28,350 mi/ac/yr

20. Environmental Performance

21. Energy Yield

22. CO 2 Footprint Comparison ZeaChem Biomass Corn Dry Mill Total CO 2e : 1.45 lb/gal Total CO 2e : 12.54 lb/gal

25. Questions & Discussion