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Carbon dioxide capture from combustion flue gases with a calcium oxide chemical loop. Experimental results and process development
Authors:M Alonso  N Rodríguez  B González  G Grasa  R Murillo  JC Abanades
Institution:1. Instituto Nacional del Carbón, CSIC-INCAR Spanish Research Council, Oviedo, Spain;2. Instituto de Carboquímica, CSIC-ICB Spanish Research Council, Zaragoza, Spain;1. Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II, Piazzale Vincenzo Tecchio 80, 80125 Napoli, Italy;2. Istituto di Ricerche sulla Combustione, Consiglio Nazionale delle Ricerche, Piazzale Vincenzo Tecchio 80, 80125 Napoli, Italy;3. Dipartimento di Scienze Chimiche, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte Sant’Angelo, 80126 Napoli, Italy;1. Faculty of Physics, University of Seville, Avenida Reina Mercedes s/n, 41012 Sevilla, Spain;2. Instituto de Ciencia de Materiales de Sevilla (C.S.I.C.-Univ. Seville), Americo Vespucio 49, 41092 Sevilla, Spain;1. Politecnico di Milano, Department of Energy, Via Lambruschini 4, 20156 Milano, Italy;2. Spanish Research Council (CSIC), Instituto de Carboquímica, Miguel Luesma Castán 4, 50018 Zaragoza, Spain;3. Lappeenranta University of Technology, LUT Energy, P.O. Box 20, 53851 Lappeenranta, Finland;1. Energy Engineering Department, University of Seville, Camino de los descubrimientos s/n, 41092 Sevilla, Spain;2. Faculty of Physics, University of Seville, Avenida Reina Mercedes s/n, 41012 Sevilla, Spain;1. University of Stuttgart, IFK, Pfaffenwaldring, 23, Stuttgart 70569, Germany;2. INCAR-CSIC, Spanish Research Council, Francisco Pintado Fe, 26, Oviedo 33011, Spain
Abstract:Post-combustion carbonate looping processes are based on the capture of carbon dioxide from the flue gases of an existing power plant in a circulating fluidized bed reactor (CFB) of calcium oxide (the carbonator) particles. The calcination of calcium carbonate in a new oxy-fired CFBC power plant regenerates the sorbent (calcium oxide particles) and obtains high purity carbon dioxide. This communication presents experimental results from a small test facility (30 kWt) operated in continuous mode using two interconnected CFB reactors as carbonator and calciner. Capture efficiencies between 70 and 97% have been obtained under realistic flue gas conditions in the carbonator reactor (temperatures around 650 °C). The similarity between process conditions and those existing in CFBC power plants should allow a rapid scaling up of this technology. The next steps for this process development are also outlined.
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