Exchange PHD student Valentina Lago from the University of Western Ontario/Canada of the research...
Chemical Looping Combustion(CLC) is a novel carbon capture and storage (CCS) technology.
This technology offers great advantages compared to the other CCS technologies like pre combustion, post combustion or oxyfuel firing. Using CLC, one has the possibility to combust fossil fuels and inherently separate the produced CO2 from the other exhaust gases. By this the overall efficiency loss of the power station can be minimized and is presumably only a fraction compared to other CCS technologies.
According to the scheme shown on the right side, in CLC the regular combustion chamber of a power plant is substituted by two interconnected high temperature reactors. Inside the so called air reactor the gaseous oxygen reacts with a reduced metal oxide. The metal oxide will be oxidized and so gaseous oxygen will be bound to the solid particles. The metal oxide particles will be transported to the second reactor, the fuel reactor. The oxidized particles will react with the fossil fuel e.g. methane. CO2 and H2O will be produced while the oxygen carrier particles will be reduced. The reduced particles will then be sent back to the air reactor.
Employing this technology, it is possible to achieve an almost pure stream of CO2 after water condensation.
For technical realization, fluidized beds are very well suited. Most experimental setups under investigation realize the air reactor as a riser reactor and the fuel reactor as a bubbling fluidized bed. To maintain different vapor atmospheres inside the two reactors particle locks have to be installed in between the two reactors.
At the SPE we are investigating the use of coal as fossil fuel, which further increases the complexity of this technology. We study oxygen carriers candidates regarding their performance and will soon set up a test facility to run the entire process.
This project receives funding from the German Federal Ministry of Economics & Technology (FKZ 0327844B / CLOCK) and the industrial partners BASF SE, EnBW Kraftwerke AG, E.ON Energie AG, Hitachi-Power Europe GmbH, RWE Power AG and Vattenfall Europe Generation AG.
M. Kramp, A. Thon, E.-U. Hartge, S. Heinrich, J. Werther, The Role of Attrition and Solids Recovery in a Chemical Looping Combustion Process, Oil Gas Sci. Technol. â€“ Rev. IFP Energies nouvelles 66 (2011) 277â€“290. DOI: 10.2516/ogst/2010035.
M. Kramp, A. Thon, E.-U. Hartge, S. Heinrich, J. Werther, Carbon Stripping - A Critical Process Step in the Chemical Looping Combustion of Solid Fuels, in: 2nd International Conference on Energy Process Engineering (ICEPE 2). Efficient Carbon Capture for Coal Power Plants, 2011.
(ICEPE2 in Franfurt, Germany, 20. â€“ 22. June 2011)
M. Kramp, A. Thon, E.-U. Hartge, S. Heinrich, J. Werther, The Influence of Carbon Stripper Efficiency on CO2-Capture Rate in a Chemical-Looping Combustion Process for Solid Fuels, in: Proceedings of the Tenth International Conference on Circulating Fluidized Beds and Fluidization Technology - CFB-10, Engineering Conferences International, New York, 2011.
(CFB10 in Sunriver, Oregon, USA, 01.-05. May 2011)
M. Kramp, A. Thon, E.U. Hartge, S. Heinrich, J. Werther, Challenges with the Coupling of Fluidized Beds For Chemical Looping Combustion, in: S.D. Kim, Y. Kang, J.K. Lee, Y.C. Seo (Eds.), Fluidization XIII. New Paradim in Fluidization Engineering, Engineering Conferences International, New York, 2010, pp. 503â€“510.
(Fluidization XIII in Gyeong-ju, Korea, 16.-21. May 2010)
M. Kramp, A. Thon, E.-U. Hartge, S. Heinrich, J. Werther, Application of SolidSim Flowsheet Simulation to the Chemical Looping Combustion, in: Abstracts and proceedings:. WCPT6 - World Congress on Particle Technology Nuremburg, Germany. 26-29.4.2010., Nürnberg Messe GmbH, Nuremburg, Germany, 2010. (ISBN: 9783000305702)
(WCPT 6, Nürnberg, Germany 26.-29.4.2010)
M. Kramp, A. Thon, E.-U. Hartge, S. Heinrich, J. Werther, The Role of Attrition and Solids Recovery in a Chemical Looping Combustion Process, in: 1st Internation Conference on Chemical Looping Proceedings, IFP, Lyon, 2010.
(1st International Conference on Chemical Looping, Lyon, 17.-19. March 2010)