The Great Plains Synfuels Plant Claudia Biffert Engineering Manager 2013 Lignite Education Seminar

DAKOTA GASIFICATION COMPANY Agenda Products Demonstrations DAKOTA GASIFICATION COMPANY

Synthetic Natural Gas (SNG) Meets pipeline quality Transported 34 miles southwest to Northern Border Pipeline Distributed out of Ventura, Iowa Facts Could heat one-half million homes Equal to 28,000 barrels oil

Liquid Nitrogen Mainly used in plant for purging Cryogenic storage medium Oil well additive Artificial insemination Medical procedures Liquid Nitrogen

Revenue Original 43.95% 53.92% 60.63% 30.89% 37.57% 30.76% 39.54% 8.58% 54.42% 11.15% 33.23% 5.82% 2.51% 1.86%

Xenon/Krypton Gases Thermal Pane Windows Halogen Lighting Lasers

Phenol Countertops Plywood/OSB/Insulation DVDs/CDs Pharmaceuticals

Cresylic Acid Wire enamel solvent Antioxidants/Vitamin E Pesticides

Naphtha Gasoline blendstock Solvents Feedstock for benzene production – Paint thinner Feedstock for benzene production

Ammonium Sulfate

Anhydrous Ammonia (NH3) Originally recovered from process Capacity – 75 ton/day In 1997, added additional capacity Capacity – 1,100 tons/day

Carbon Dioxide (CO2)… - Weyburn Revenue Environmental DGC Pipeline

Carbon Dioxide Reached a milestone of delivering 25 million metric tons of CO2 on Feb. 24, 2013, at 4:53 a.m.

Tar Oil Fuel Oil #6

Revenue Original 43.95% 53.92% 60.63% 30.89% 37.57% 30.76% 39.54% 8.58% 54.42% 11.15% 33.23% 5.82% 2.51% 1.86%

Future Opportunities Liquid fuels Lubricants Neon/Argon Diesel Gasoline Lubricants Neon/Argon

Summary New Products Urea SNG Revenue