Institute of Thermal and Separation Processes/ Heat and Mass Transfer Li f ti fO f l Fl G Dipl.‐Ing. D. Köpke Prof. Dr.‐Ing. R. Eggers Liquef action ofOxyfuel Flue Gas Experimental Results and Experimental Results and Comparison with Phase Equilibrium Calculations Institute of Energy Systems Dipl.‐Ing. K. Mieske Dr.‐Ing. A. Kather 1st Oxyfuel Combustion Conference Cottbus 2009 Cottbus, 2009
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Institute of Thermal and Separation Processes/Heat and Mass Transfer
Li f ti f O f l Fl GDipl.‐Ing. D. KöpkeProf. Dr.‐Ing. R. Eggers
Liquefaction of Oxyfuel Flue Gas
Experimental Results andExperimental Results and Comparison with Phase Equilibrium Calculations
• IHI JapanExperiments in Feb 2008, presented at IEA Oxy‐CombustionWorkshop in Yokohama, Japan, März 2008 (Uchida et al. Recent Test Resultson Oxy‐Fuel Combustion Using the Pilot‐Scale Test Facilities)T = ‐50°C, p = 24 bar (pmax = 45 bar), thermal capacity: 1,2 MWth
CO2‐concentration at compressor outlet: 50% • Hamburg University of Technology
First liquefaction experiment: July 2008T = ‐30 … ‐55°C, pmax = 60 barLiquefaction of 5 m3/h oxyfuel flue gas from hard coal
• Vattenfall, Schwarze PumpeOfficial beginnig of operation: August 2008Thermal capacity: 30 MWth, lignite
• TU DresdenEnd of 2008; 5…10m3/h flue gas, lignite; / g , g
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Goal of the Experiments
• Validation of Models
▸ Aspen Plus
▸ phase equilibrium calculationsp q
▸ Heat transfer measurements
• Understanding and experience with the process
• Identification of problems• Identification of problems
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Phase Equilibrium Calculation
gaseous phase
• Thermodynamic equilibrium calculation withequations of state:
flue gas
gaseous phasey i.e.
• Peng‐Robinson‐EOS,
• Redlich Kwong Soave EOSflue gas
T,Pz
• Redlich‐Kwong‐Soave EOS
• PSRK
•
xliquid phase
• …
liquid phase(CO2 rich)
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Phase Equilibrium Calculation
• Phase equilibrium measurements
▸ phase equilibrium measurements in high pressure view cells