OPTIMISED METHOD FOR PRODUCING CALCIUM SILICATES THAT ARE CAPABLE OF CAPTURING CO2, SILICATES OBTAINED IN THIS WAY, AND USE OF SAME

OPTIMISED METHOD FOR PRODUCING CALCIUM SILICATES THAT ARE CAPABLE OF CAPTURING CO2, SILICATES OBTAINED IN THIS WAY, AND USE OF SAME

The invention relates to a method for producing calcium silicates that are capable of capturing CO2, from agro-industrial sub-products, co-products or residues having a calcium content and a silicon content. Portlandite obtained as a residue in the acetylene or calcium chloride industry is used as t...

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Bibliographische Detailangaben
Hauptverfasser: MORALES FLOREZ, VÍCTOR, ESTEBAN PORTILLO, ELISABET, GALAN HUERTOS, EMILIO, MORINA DIAZ, ISABEL, ESQUIVIAS FEDRIANI, LUÍS, LOPEZ FUENTES, ANTONIO LUÍS, SANTOS SANCHEZ, ALBERTO
Format: Patent
Sprache:eng ; spa
Schlagworte:
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Beschreibung
Zusammenfassung:The invention relates to a method for producing calcium silicates that are capable of capturing CO2, from agro-industrial sub-products, co-products or residues having a calcium content and a silicon content. Portlandite obtained as a residue in the acetylene or calcium chloride industry is used as the source of calcium and rice hulls that are an agroindustrial co-product or residue in the rice cultivation or powder silica industry are used as the source of silicon. The process comprises the mixture and homogenisation of a calcium source and a silicon source and a subsequent heat treatment of the mixture at temperatures of between 400 DEG C y 900 DEG C. The invention also relates to the use of calcium silicates produced by means of said method as selective CO2-capturing agents in gaseous currents, by means of a carbonatation process in humid conditions at room pressure and temperature, simultaneously generating calcites with a potential industrial application. Procedimiento para la preparación de silicatos de calcio con capacidad para captar CO2, a partir de subproductos, coproductos o residuos agro-industriales con contenido en calcio y en silicio. Como fuente de calcio se utiliza portlandita obtenida como residuo de la industria del acetileno o cloruro de calcio; como fuente de silicio se utiliza cascarilla de arroz coproducto o residuo agro-industrial de la industria arrocera o sílice en polvo. El proceso comprende la mezcla y homogeneización de una fuente de calcio y una de silicio y un posterior tratamiento térmico de la mezcla a temperaturas entre 400ºC y 900ºC. Asimismo, la presente invención se refiere al uso de silicatos de calcio preparados mediante este procedimiento como captadores selectivos de CO2 en corrientes gaseosas, mediante proceso de carbonatación en condiciones húmedas a presión y temperatura ambiental, generando al mismo tiempo, calcitas con potencial aplicación industrial.