1. © 2003 Reliant Reliant Seward Station CFB: Successful Conversion of Waste Coal into Energy Energy from Biomass and Waste Symposium September 27, 2007

2. © 2003 Reliant 1 Energy/Electric Power Steam Electric » Coal » Other fossil Biomass Shale » Nuclear » Combined cycle Simple Cycle » Combined cycle » Combustion turbine Fuels Cells & Thermo Nuclear Renewables » Wind » Solar » Hydro » Pumped storage » Other renewables Geothermal Wave etc Coal Wood, refuse, etc Nuclear Petroleum, distillates, PNG/LNG Fuel

3. © 2003 Reliant 2 Electric Power Projections (DOE) Total Electricity Generation (Gwe) 2004 - 629.80 2005 - 648.18 2006 - 649.49 2007 - 664.69 2008 - 677.08 2009 - 693.45 2010 - 701.99 2011 - 711.07 2012 - 718.01 2013 - 723.45 Centralized vs. Distributed Systems Valuable infrastructure Generation by fuel type (2008) Coal 82% Petrolium.6% Natural Gas 6% Nuclear 9% Renewables/other 1.1% ~ 2% growth/annum 2025 (Coal 75% Gas12%)

4. © 2003 Reliant 3 Seward – Legacy of Coal Mining in Pennsylvania Waste Coal (“boney”) Blights the landscape Contributes to Acid Mine Drainage (AMD) As a fuel, waste coal is Higher than some sources: sulfur ash Yet Lower than most sources in energy value CFB technology can cleanly convert waste coal into energy

5. © 2003 Reliant 4 Seward - CFB Aerial Photo – October 2006 521 net MW Fuel BTU 5500 BTU 51% Ash 2.75% Sulfur DOE Clean Coal Technology CFB – Circulating Fluidized Bed

6. © 2003 Reliant 5 Seward – How Pollution Control Technology SNCR – NOx Limestone/FDA – SO 2 Baghouse Fuel – Barn and Covered Conveyors ~ 3.5M tons per year refuse Seward CFB Schematic

7. © 2003 Reliant 6 Seward – Air Emissions NOx – Down 74% CFB low temperatures Selective Non-Catalytic Reduction (SNCR) SO2 – Reduced 85% Limestone injection FDA – Flash Dry Absorber Particulate Matter – Down 90% Fabric filter (baghouse) Enclosed fuel storage

8. © 2003 Reliant 7 Seward – Generating Capacity Generating capacity increases 2-1/2 times Energy production will increase even more New plant should run as “baseload” (~ 24/7)

9. © 2003 Reliant 8 Seward – Future Challenges Hg GHG Holistic – multi-faceted approach to energy Manufacture Consumption