Carbonato de glicerol a partir de glicerol del biodiesel: una alternativa sustentable en biorrefinerías
Date
2018
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Abstract
El crecimiento en la producción de biodiesel genera grandes cantidades de glicerol. El propósito de este trabajo es obtener, a partir de esta materia prima renovable, carbonato de glicerol utilizando como catalizadores óxidos mixtos con diferentes contenidos de Cs incorporado. Los óxidos metálicos mixtos son catalizadores básicos que se obtienen por descomposición térmica de los hidróxidos dobles laminares, nanoarcillas aniónicas sintéticas, de fácil síntesis y bajo costo. Precursores y óxidos pueden potenciar sus propiedades incorporando un tercer metal a la estructura, como Cesio. Los materiales se caracterizaron por sus propiedades estructurales, morfológicas, de composición y de sitios básicos. Se encontró la estructura característica de capas tipo brucita en los precursores y MgO periclase y Cs2O en los óxidos. Las áreas de los óxidos fueron mayores que las de sus precursores. Un aumento en la basicidad media del material con mayor contenido de Cs podría corresponderse con la mayor conversión de glicerol
The growth in biodiesel production is generating an excess of glycerol as a by-product. The aim of this work is to obtain glycerol carbonate from glycerol and dimethyl carbonate, using mixed oxides with Cs incorporated as solid catalyst. The mixed metal oxides are basic catalysts obtained from double layered hydroxides, synthetic anionic nanoclays, characterized by easy synthesis and low cost that present applications as catalytic precursors or supports. Precursors and oxides tune their properties by incorporating a third metal to the structure, such as Cesium. The precursors and their oxides were characterized by structure, morphology, composition and basic properties. The diffractograms showed the characteristic structure of brucite-like layers in the precursors. The phases MgO periclase and Cs2O in the oxides were identified. The areas of the oxides were greater than those of their precursors. The incorporation of Cs was proportional to the theoretical loading, as well as the basic properties and glycerol conversion
The growth in biodiesel production is generating an excess of glycerol as a by-product. The aim of this work is to obtain glycerol carbonate from glycerol and dimethyl carbonate, using mixed oxides with Cs incorporated as solid catalyst. The mixed metal oxides are basic catalysts obtained from double layered hydroxides, synthetic anionic nanoclays, characterized by easy synthesis and low cost that present applications as catalytic precursors or supports. Precursors and oxides tune their properties by incorporating a third metal to the structure, such as Cesium. The precursors and their oxides were characterized by structure, morphology, composition and basic properties. The diffractograms showed the characteristic structure of brucite-like layers in the precursors. The phases MgO periclase and Cs2O in the oxides were identified. The areas of the oxides were greater than those of their precursors. The incorporation of Cs was proportional to the theoretical loading, as well as the basic properties and glycerol conversion
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Óxidos metálicos mixtos, Hidróxidos dobles laminares, Glicerol, Carbonato de glicerol, Mixed metal oxides, Layered double hydroxides, glycerol, glycerol carbonate
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