Overview of Oxycombustion Technology ASME PTC 4 5

Overview of Oxycombustion Technology ASME PTC 4. 5 Kick-off Meeting Orlando, Florida December 16, 2010 D. K. Mc. Donald, Technical Fellow, Babcock & Wilcox Co. 1

Oxy-combustion burns coal with a mixture of oxygen and recycled flue gas instead of air to produce a concentrated CO 2 stream for storage 2

Oxy-Coal Plant Configuration ASU Boiler Island Nitrogen (N 2 ) Out Air In Pure Oxygen Air Separation (O 2 ) Unit CPU Other gases (NCGs) Recycled Flue Gas CO 2 and Boiler Flue Gas Environmental Cleanup Equipment Ash H 2 O Coal In Other Captured Emissions CO 2 Compression SO 2 Capture (liquid) 3

Oxy-Coal Plant Configurations To Storage Very High Sulfur Coals Secondary (FD) Fan ASU Air Intake CPU Recycle Damper Sorbent for SO 3 Recycle Heater Boiler Burners PJFF Gas Cooler WFGD/ DCC Gas Htr ID Fan Coal Recycle Damper Primary Fan Cold Recycle Process Air Intake Pulverizers 4

Oxy-Coal Plant Configurations To Storage High Sulfur Coals Secondary (FD) Fan ASU Air Intake Stack Damper CPU Vent Gas Htr Secondary Recycle Damper Sorbent for SO 3 Recycle Heater Boiler Burners PJFF CPU Gas Cooler WFGD/ DCC Gas Htr ID Fan Coal Primary Fan Cool Recycle Process Air Intake Primary Recycle Damper Pulverizers 5

Oxy-Coal Plant Configurations To Storage Medium Sulfur Coals Secondary (FD) Fan Air Intake ASU Stack Damper CPU Vent CPU Secondary Recycle Damper Recycle Heater Gas Cooler SDA Boiler Burners WFGD/ DCC PJFF Gas Htr ID Fan Coal Primary Fan Cool Recycle Process Air Intake Primary Recycle Damper Pulverizers 6

Oxy-Coal Plant Configurations Low Sulfur Coals To Storage Secondary (FD) Fan ASU Air Intake CPU Recycle Damper Recycle Heater Gas Cooler PJFF SDA Boiler Burners DCCPS PJFF Gas Htr ID Fan Coal Recycle Damper Primary Fan Warm Recycle Process Air Intake Pulverizers 7

Oxy-Coal Air Emissions 8

Benefits of Oxy-Coal Combustion • Oxy-combustion is potentially the highest efficiency and lowest cost CO 2 capture technology for coal fired plants* • Near Zero Emissions of criteria air pollutants (NZEP) • >90% CO 2 capture at pipeline quality and purity specifications • Low technology risk – plant components are primarily conventional equipment modified for operation in the oxy-mode. An oxy-plant will look and operate like a conventional power plant. • Can be retrofit as easily as post combustion capture Ø Same existing plant equipment and space requirements Ø No LP steam requirement (output can be increased by heat integration) Ø No new chemicals or solvents • Unique operating options to can maximize output during the day * DOE/NETL 2007 -1291 Rev. 2, August 2008, “Pulverized Coal Oxy-combustion Power plants” DOE/NETL 2007 -1281 Rev. 1, August 2007 “Cost and Performance Baseline for Fossil Energy Plants” 9

Future. Gen 2. 0 – Oxy-Combustion Project Structure • Capture – Ameren Energy Resources (AER), teamed with B&W and Air Liquide • Transport & Storage – Future. Gen Alliance Boiler Island ASU Meredosia Plant • Meredosia, IL: Owned/operated by AER • 3 -coal fired units (2 retired) • 1 -oil-fired unit • 200 MWe oil-fired Unit 4 built in 1975 • Repower Unit 4 steam-turbine • Purpose-built Oxy-PC boiler • Illinois Coal, PRB or PRB blends Project Timeline • Expect project award by Sept. 30, 2010 • Phased approach to develop project • Commission by end of 2015 CPU 10

Meredosia Clean Coal Facility CPU Cold Box CPU eratur Temp ng e Swi n ptio Absor Flue Gas to CPU Direct Contact Cooler/ Polishing Scrubber Air/Recycle Heater B&W r Boile Main WFGD c Fabri Filter ASU eratur Temp ng e Swi n ptio Absor ASU Air Filter 2 -Stage Direct Contact Cooler ID Fan ASU Cold Box ASU Main Heat Exchanger rs erize Pulv Liquid Oxygen Storage 11

ASU booster Oxygen Piping to Boiler ASU cold box ASU main heat exchanger ASU nitrogen/water tower ASU Front End Temperature Swing Absorption ASU air filter ASU 2 -stage Direct Contact Air Cooler ASU Main Air compressor BFW preheater 12

CPU Flue Gas Filter CPU Flue Gas and CO 2 compressor CPU Front Temperature CPU Non-condensed Swing Absorption gas Expanders CPU inlet pipe CPU cold box CPU Main heat exchanger CPU CO 2 Pumps 13

Comparison of Net Plant Efficiency for Carbon Capture Technologies 14

Comparison of Levelized COE for Carbon Capture Technologies 15

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