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handle: 10261/31180
[EN] The invention relates to a method of separating CO2 from flue gases, which can be used at areas with large emissions (thermal power stations using any carbonaceous fuel). The separated CO2 stream can be used and/or contained in geological formations. The inventive method aims to reduce the high costs involved in CO2 separation which prevent large-scale use of the CO2 containment options outlined in the UN's IPCC reports. Said method consists in bringing flue gases into contact with a calcareous sorbent (calcined dolomite, limestone) at 650-750 DEG C, thereby producing the CO2 capture reaction by means of the rapid carbonation of the sorbent. The sorbent is regenerated in another reactor (calciner) which operates in CO2 or CO2/H2O atmospheres and at a pressure equal to or less than atmospheric pressure. [ES] Se propone un proceso para la separación de CO2 de gases de combustión aplicable a puntos de gran emisión (centrales térmicas de cualquier combustible carbonoso). La corriente de CO2 separada es susceptible de utilización y/o confinamiento en formaciones geológicas. El proceso propuesto pretende reducir los altos costes de separación de CO2, que impiden el uso a gran escala de estas opciones de confinamiento de CO2, recogidas en los informes del IPCC de la ONU.La invención consiste en poner en contacto los gases de combustión con un sorbente calcáreo (caliza, dolomita calcinadas) a 650-750 DEG C donde se produce la reacción de captura de CO2 por la rápida carbonatación del sorbente. la regeneración del sorbete se lleva a cabo en otro reactor (calcinador) que trabaja en atmosferas de CO2 o CO2/H2O y en a presión igual o inferior a la atmosférica.
Fecha de solicitud: 14.03.2003.- Titulares: Consejo Superior de Investigaciones Científicas (CSIC).- Granfield University.
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