Reduction of carbon dioxide emission through the sorption in situ using a fluidised bed reactor
The paper discusses the possibility of using the reversible reaction CaCO3 ↔ CaO + CO2 for the cyclic capture and release of CO2 directly inside a fluidised bed combustor. This could lead to the lowering of CO2 emissions into the atmosphere, as part of an effort to mitigate the greenhouse effect associated with the rising atmospheric CO2 concentrations resulting from obtaining energy from burning fossil fuels.
An enrichment coefficient E has been introduced and defined as a measure of the production of CO2 (on calcining CaCO3) or its removal (on carbonation of CaO) with respect to the level associated with fuel combustion alone. The observations made on the effect of introducing an additional external stream of CO2 on the efficiency of the chemical capture process have been described. Through an appropriate control of the temperature inside the reactor it is possible to change the value of E over the range [-0.8; 0.8]. This implies that up to about 80% of the CO2 derived from the fuel can be temporarily retained within the bed and released later, at a higher concentration. The proposed method of burning fuel in a chemically active fluidised bed could be an available method leading to CO2 isolation from the flue gases and leading to its eventual sequestration.
Avedesian, M. M. & Davidson, J. F. (1973). Combustion of carbon particles in a fluidised bed. Trans. Inst. Chem. Eng. 51, 121-131
Stubington, J. F. & Davidson, J. F. (1981). Gas-phase combustion in fluidized beds. AIChE Journal. 27, 59-65
Dennis, J., Hayhurst, A. N. & Mackley, I. G. (1982). The ignition and combustion of propane/air mixtures in a fluidised bed. In Revelling in Reference: 19th Symposium (Int.) on Combustion 8-13 August 1982 (pp. 1205-1212). Haifa, Israel: The Combustion Institute, Pittsburgh
Hayhurst, A. N. & Tucker, R. F. (1990). The combustion of carbon monoxide in a two-zone fluidized bed. Combust. Flame. 79, 175-189 DOI: 10.1016/0010-2180(90)90042-P
Hayhurst, A. N. (1991). Does carbon monoxide burn inside a fluidized bed? A new model for the combustion of coal char particles in fluidized beds. Combust. Flame. 85, 155-168
Hesketh, R. P. & Davidson, J. F. (1991). Combustion of methane and propane in an incipiently fluidized bed. Combust. Flame. 85, 449-467
Kandefer, S. & Pilawska, M. (1995). Fluidised Bed Combustion of Gaseous Fuels. In Revelling in Reference: 3rd International Conference on Technologies and Combustion for a Clean Environment 3-6 July 1995 (pp. 29.4.22-28). Lisbon, Portugal: Technical University of Lisbon.
Stubington, J. F. & Clough, S. J. (1997). The combustion rate of volatiles in a fluidized bed combustor. In Revelling in Reference: 14th International Conference on Fluidized Bed Conmbustion 11-14 May 1997 (pp.1111-1122, Vol. 2.). Vancouver, Canada: ASME, New York
Żukowski, W. (2002) The pressure pulses generated by the combustion of natural gas in bubbling fluidized beds. Combust. Flame. 130, 15-26 DOI: 10.1016/S0010-2180(02)00357-7
Baron, J., Bulewicz, E. M., Kandefer, S., Pilawska, M. & Żukowski, W. (2002). Combustion of hydrocarbon fuels in a bubbling fluidized bed. Combust. Flame. 128, 410-421 DOI: 10.1016/S0010-2180(01)00359-5
Żukowski, W. (2003). A simple model for explosive combustion of premixed natural gas with air in a bubbling fluidized bed of inert Combust. Flame. 134, 399-409 DOI: 10.1016/S0010-2180(03)00139-1
Pilawska, M., Baron, J. & Żukowski, W. (2003). Combustion of Aromatics and Esters in an Atmospheric Bubbling FBC in Comparison with that of Natural Gas. In Revelling in Reference: 7th International Conference on Technologies and Combustion for a Clean Environment 7-10 July 2003 (pp 36.3). Lisbon, Portugal: Technical University of Lisbon.
Bulewicz, E. M., Żukowski, W., Kandefer, S. & Pilawska, M., (2003). Flame flashes when bubbles explode during the combustion of gaseous mixtures in a bubbling fluidized bed. Combust. Flame. 132, 319-327 DOI: 10.1016/S0010-2180(02)00466-2
Żukowski, W. (2004). Combustion of Gaseous Fuels in a Fluidised Bed of Inert Particles (in Polish). Cracow, Poland: Cracow University of Technology
Żukowski, W. (2005). Methane and Ethane Combustion in an Inert Fluidized Bed. In Revelling in Reference: 18th International Conference on Fluidized Bed Combustion 22-25 May 2005 (paper FBC2005-78100). Toronto, Canada: ASME, New York
Baron, J., Bulewicz, E. M., Kandefer, S., Pilawska, M. & Żukowski, W. (2006). A simple physicochemical view of bubbling. In Revelling in Reference: 19th International Conference on Fluidized Bed Combustion 21-24 May 2006 (Paper 43C). Vienna, Austria: Vienna University of Technology
Baron, J., Bulewicz, E. M., Kandefer, S., Pilawska, M., Żukowski, W. & Hayhurst, A. N. (2006). The combustion of polymer pellets in a bubbling fluidised bed. Fuel. 85, 2494-2508 DOI: 10.1016/j.fuel.2006.05.004
Żukowski, W., Baron, J., Błaszczyk-Pasteczka, A., Kandefer, S. & Olek, M. (2008). Effects of burning propane in inert and chemically active fluidized beds. Przem. Chem. 87(2), 214-218
Bes, A. (2006). Dynamic Process Simulation of Limestone Calcination in Normal Shaft Kilns. Unpublished doctoral dissertation, Otto-von-Guericke Magdeburg University, Magdeburg, German