Fourth Annual Conference on Carbon Capture & Sequestration Developing Potential Paths Forward Based on the Knowledge, Science and Experience to Date Capture and Separation- Oxyfuel Combustion CO 2 Compression Units for Oxy-Fuel Combustion Kourosh E. Zanganeh, Ahmed Shafeen, Carlos Salvador, Murlidhar Gupta, and Bill Pearson Fossil Fuels and Climate Change Group,CANMET Energy Technology Center, Natural Resources Canada, 1 Hannel Drive, Ottawa, ON, K1A 1M1, Canada May 2-5, 2005, Hilton Alexandria Mark Center, Alexandria Virginia
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Fourth Annual Conference on Carbon Capture & Sequestration
Developing Potential Paths Forward Based on the Knowledge, Science and Experience to Date
Capture and Separation- Oxyfuel Combustion
CO2 Compression Units for Oxy-Fuel CombustionKourosh E. Zanganeh, Ahmed Shafeen, Carlos Salvador, Murlidhar Gupta, and Bill
Pearson
Fossil Fuels and Climate Change Group,CANMET Energy Technology Center, Natural Resources Canada, 1 Hannel Drive, Ottawa, ON, K1A 1M1, Canada
May 2-5, 2005, Hilton Alexandria Mark Center, Alexandria Virginia
Outline
• Fuel combustion and CO2 capture pathways• Oxy-fuel Combustion• CO2 compression and capture processes
– Once-through process– Autorefrigeration (Fluor process)– Novel CETC process
• Pretreatment and moisture separation• Process modeling and simulation• Results• Conclusions
Capture Pathways
Air-combustion
Coal
NG
Biomass
Petcoke
Gasification
Oxy-combustion
CO2 Capture
Power & Heat
CO2 (>90 bar) Transport for
Storage
O2
CO2 Capture
Combustion Power & Heat
Power & Heat
CO2 Capture & Compression
Flue gas
5-15% CO2
@ 1 bar
Syngas
20-40% CO2
Flue gas
>80% CO2
@ 1 bar
CO2
CO2
CO2 (~20 to 50 bar)
H2
CO2 Compression
CO2 Compression
> 99%@ 1bar
Pump
Schematic of Oxy-Fuel Combustion for Power or Heat Generation
Recycled Flue Gas
Air SeparationUnit
O2
Gas Purification
Fossil fuelcombustion
Power or Heat
N2
StorageCO2
Compression
1/5 exit gas volume relative to airCO2 at 80-98% by volume
Other pollutants and/or water
For process heaters, furnaces and boilers
An Idealized Thermodynamic Path of Compression, Cooling, and Pipeline Operations
for CO2
Mohitpour M., Golshan H., and Murray A., Pipeline Design and Construction: A Practical Approach, New York, American Society of Mechanical Engineers Press, 2000
CO2 Phase Diagram
http://www.acpco2.com/index.php?lg=en&pg=2121
Conventional Multistage Compression
Autorefrigeration Separation of Carbon Dioxide (Fluor Process)
PretreatmentModule
Vent Module
PumpingModule
Expander &Separator
Module
2nd StageCompression
Module
1st StageCompression
Module
ToAtmosphere
(Stack Flue Gas)
CO2 Product Stream
Stream 1 Stream 5
Stream 8
Stream 3
Stream 4
Stream 7
Stream 6Stream 2Feedgas
(Extract Energy)
(Extract Energy)
(H2O) (H2O)
Novel CETC Process
• Proprietary process• Some process simulation results will
be presented• Comparison between the results:
– CETC Compression process versus Fluor Autorefrigeration/separation process
Assumptions for Simulation
• Same baseline design conditions • Inlet pressure and temperature
– 1 bar, 40 0C• Vent pressure and temperature
– 6 bar; above dew point• Product pressure and temperature
– Optimum pressure is derived from the simulation at -5 0C
Feed Gas Composition
Properties Unit Compressor InletFeed gas-1 Feed gas-2 Feed gas-3
Temperature 0C 40 40 40Pressure bar 1 1 1Flow Rate kg/hr 181.0 181.0 181.0Composition