INDUSTRIAL COAL GASIFICATION SYSTEM FOR US MIDWEST ETHANOL PLANT. Gasification Technologies Conference

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1 INDUSTRIAL COAL GASIFICATION SYSTEM FOR US MIDWEST ETHANOL PLANT Presented to Gasification Technologies Conference October 15-17, 2007

2 Homeland Energy Solutions Project Nominal 100 MMGPY Ethanol plant in New Hampton, IA Coal gas used for natural gas replacement for thermal oxidizers and dryers Ethanol plant to be EPC by Fagen/ICM Gasification plant to be EPC by Burns & McDonnell PRB coal supply by Peabody CoalTrade (NYSE BTU) with plant established as hub point for delivery to other local coal customers Air permit application filed December 28, 2006 Air permit issued as BACT on August 8, 2007 Project gasification scope: EPIC 2ST-3.6 gasifiers and gas clean-up Mercury removal H2S removal to 10 ppm Supply nominal 540 MMBTU/hour

3 EPIC Gasification Uses Boiler fuel for existing natural gas boilers Boiler fuel as coal replacement (saves customer expenditure on air pollution control upgrades) Ethanol plants (boilers and power generation) Kiln fuel (cement, minerals, etc.) Process furnaces (glass etc.) IGCC

4 Typical Block Flow of the Gasifier System Steam Coal Gasifier Tar/Oil Particulate Removal Sulfur Removal Clean Gas Out Air Ash Elemental Sulfur

5 EPIC Air-Blown Coal Gasification Technically proven in operation in China for over 40 years with availability greater than 95%. Modifications made for gas cleanup, mercury removal and H2S removal. Fuel quality acceptable for most gas turbines, boilers and process furnaces. Nominal HV of 200 btu/scf Scalable.

6 Plant Characteristics Standard gasifier is EPIC 2ST Standard plant is two gasifiers. Multiple gasifier modules for higher demand. Can be configured to closely match site needs. Small footprint x 220. Nominal 250 MMbtu per hour per gasifier.

7 The Gasifier Fixed Bed EPIC 2ST-3.6 Large installed base Designed to produce fuel gas Primarily Air-blown but O2 enrichment is possible Typical gas composition (air-blown): 31.5% CO, 19.7% H2, 4.3% CO2, 39.6% N2, 4.7% CH4 and 0.2% CxHy, 10 PPM H2S with a HHV of 216 BTU/SCF (LHV of 201 BTU/SCF)

8 EPIC Gasification Section US Patent pending on system Uses common components Recycle tars and light oils Gas to desulfurization system

9 EPIC Gasification Key Components Upper refractory after 10 years note that refractory is low temperature and minimal sliding wear 2ST-3.0 Grates note all cast steel, robust construction with individual pieces replaceable without replacing entire grate

10 Sulfur Removal GTP s LO-CAT system and low temperature hydrolysis shown Can also use commercial systems such as EPIC s 888, Natco/Shell- Pacques or CrystaSulf systems

11 Mercury Guard Carbon bed commercial acceptable technology. Removal percentages to below detectable levels. Long life of bed.

12 Permit Allowable Emissions Pollutant Plant Limits Gasification Limits Reference Particulate (PM) 0.01 lb/mmbtu ~0.0 BACT PM lb/mmbtu ~0.0 BACT Opacity 0% 0.0 BACT SO2 (H2S) lb/mmbtu <10 ppm BACT NOx 0.04 lb/mmbtu 0.0 BACT VOC 98% reduction or 0.06 lb/mmbtu CO lb/mmbtu 0.0 BACT 0.0 BACT

13 EPIC Plant Layout

14 EPIC Plant Layout

15 EPIC Plant Layout

16 Concluding Comments Many opportunities are available for air-blown gasification Replacement for natural gas with clean coal gas Stable pricing Lower NOx emissions Relatively easy carbon and mercury strategies Industrial IGCC or IGCP Uses common industrial gas turbines High levels of supplemental firing enhance steam cycle Repower existing industrial steam turbines for IGCC or IGCP

17 Contact Information David Wakefield - President dwakefield@epic-power.com Bill Douglas SVP - Development bdouglas@epic-power.com Econo-Power International Corp. Ph Fax