Naturally occurring limestone and dolomite samples, originating from different geographical locations, were tested as potential sorbents for carbonation/calcination based capture from combustion flue gases. Samples have been studied in a thermogravimetric analyzer under simulated flue gas conditions at three calcination temperatures, viz., , , and for four carbonation calcination reaction (CCR) cycles. The dolomite sample exhibited the highest rate of carbonation than the tested limestones. At the third cycle, its capture capacity per kilogram of the sample was nearly equal to that of Gotland, the highest reacting limestone tested. At the fourth cycle it surpassed Gotland, despite the fact that the content of the Sibbo dolomite was only 2/3 of that of the Gotland. Decay coefficients were calculated by a curve fitting exercise and its value is lowest for the Sibbo dolomite. That means, most probably its capture capacity per kilogram of the sample would remain higher, well beyond the fourth cycle. There was a strong correlation between the calcination temperature, the specific surface area of the calcined samples, and the degree of carbonation. It was observed that the higher the calcination temperature, the lower the sorbent reactivity. The Brunauer–Emmett–Teller measurements and scanning electron microscope images provided quantitative and qualitative evidences to prove this. For a given limestone/dolomite sample, sorbent’s capture capacity depended on the number of CCR cycles and the calcination temperature. In a CCR loop, if the sorbent is utilized only for a certain small number of cycles , the capture capacity could be increased by lowering the calcination temperature. According to the equilibrium thermodynamics, the partial pressure in the calciner should be lowered to lower the calcination temperature. This can be achieved by additional steam supply into the calciner. Steam could then be condensed in an external condenser to single out the stream from the exit gas mixture of the calciner. A calciner design based on this concept is illustrated.
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January 2009
Research Papers
Cyclic Carbonation Calcination Studies of Limestone and Dolomite for Separation From Combustion Flue Gases
Sivalingam Senthoorselvan,
Sivalingam Senthoorselvan
Lehrstuhl Energiesysteme,
e-mail: sivalingam@es.mw.tum.de
Technische Universität München (TUM)
, Boltzsmannstrasse 15, 85748 Garching, Germany
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Stephan Gleis,
Stephan Gleis
Lehrstuhl Energiesysteme,
Technische Universität München (TUM)
, Boltzsmannstrasse 15, 85748 Garching, Germany
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Spliethoff Hartmut,
Spliethoff Hartmut
Lehrstuhl Energiesysteme,
Technische Universität München (TUM)
, Boltzsmannstrasse 15, 85748 Garching, Germany
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Patrik Yrjas,
Patrik Yrjas
Combustion and Materials Chemistry,
Åbo Akademi Process Chemistry Centre
, Biskopsgatan 8, FI-20500 Åbo, Finland
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Mikko Hupa
Mikko Hupa
Combustion and Materials Chemistry,
Åbo Akademi Process Chemistry Centre
, Biskopsgatan 8, FI-20500 Åbo, Finland
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Sivalingam Senthoorselvan
Lehrstuhl Energiesysteme,
Technische Universität München (TUM)
, Boltzsmannstrasse 15, 85748 Garching, Germanye-mail: sivalingam@es.mw.tum.de
Stephan Gleis
Lehrstuhl Energiesysteme,
Technische Universität München (TUM)
, Boltzsmannstrasse 15, 85748 Garching, Germany
Spliethoff Hartmut
Lehrstuhl Energiesysteme,
Technische Universität München (TUM)
, Boltzsmannstrasse 15, 85748 Garching, Germany
Patrik Yrjas
Combustion and Materials Chemistry,
Åbo Akademi Process Chemistry Centre
, Biskopsgatan 8, FI-20500 Åbo, Finland
Mikko Hupa
Combustion and Materials Chemistry,
Åbo Akademi Process Chemistry Centre
, Biskopsgatan 8, FI-20500 Åbo, FinlandJ. Eng. Gas Turbines Power. Jan 2009, 131(1): 011801 (8 pages)
Published Online: October 14, 2008
Article history
Received:
April 9, 2008
Revised:
April 15, 2008
Published:
October 14, 2008
Citation
Senthoorselvan, S., Gleis, S., Hartmut, S., Yrjas, P., and Hupa, M. (October 14, 2008). "Cyclic Carbonation Calcination Studies of Limestone and Dolomite for Separation From Combustion Flue Gases." ASME. J. Eng. Gas Turbines Power. January 2009; 131(1): 011801. https://doi.org/10.1115/1.2969090
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