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Pretratamiento con agua líquida caliente de raquis de banano

Authors: Quintana Marín, Juan Carlos;

Pretratamiento con agua líquida caliente de raquis de banano

Abstract

Los residuos generados después de la producción de banano representan un material celulósico abundante que tiene potencial para ser usado en la producción de biocombustibles celulósicos. La conversión eficiente de biomasa lignocelulósica en azúcares monoméricos requiere reducción del tamaño de partícula, pretratamiento e hidrólisis enzimática. El agua líquida caliente (ALC) es un pretratamiento hidrotérmico efectivo con potencial en aplicaciones industriales que debe ser optimizado en términos de la temperatura, tiempo de reacción, tamaño de partícula de la biomasa y la relación agua: sólidos que puede variar dependiendo de las características de la lignocelusa. En este trabajo se optimizó el pretratamiento con agua líquida caliente de raquis de banano para temperaturas entre entre180 and 220°C, tiempos entre 0 y 60min, dos rangos de tamaño de partículas (0.42 mm y 2.83 a 6.35 mm) y carga de sólidos de 5 y 15% peso seco (p/p). El mayor rendimiento de glucosa (82%) se evidenció a 220oC durante 20 min. Mientras estas condiciones reflejan la solubilización de casi toda la hemicelulosa, el rendimiento a xilosa y arabinosa decreció por la presencia de compuestos alcalinos en el raquis fresco, los cuales catalizaron la degradación a sustancias húmicas. Se propuso un modelo con dependencia de la temperatura, tipo Arrhenius, el cual describe acertadamente la formación en serie de oligómeros. Abstract: Banana agricultural waste represents a regionally-specific and abundant cellulosic material that has potential as a feedstock for producing cellulosic biofuels. Efficient conversion of lignocellulosic biomass into monomeric sugars requires particle size reduction, pretreatment, and enzymatic hydrolysis. Liquid hot water (LHW) is an effective hydrothermal pretreatment process with potential for industrial application that must be optimized in terms of the temperature, reaction time, particle size of biomass, and water: solids ratio that can vary depending upon the characteristics of the lignocellulose. We present the optimization of LHW pretreatment of banan rachis for temperatures between 180 and 220°C, at times between 0 and 60min, two particle size ranges (0.42 mm and 2.83 to 6.35 mm), and solid loadings of 5 and 15% dry matter (w/w). The highest saccharification yields of glucose (82%) occurred after pretreatment at 220°C for 20 min. While these conditions resulted in extraction of nearly all of the hemicellulose, the yield of xylose and arabinose was lowered by the presence of alkali in the raw material which catalyzed the degradation. A model was proposed in order to elucidate the serial formation of oligomers and subsequent monomers but mostly humins Maestría

Country
Colombia
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Keywords

Hidrólisis enzimática de celulosa, 66 Ingeniería química y Tecnologías relacionadas/ Chemical engineering, Raquis de banano, Cellulose enzymatic hydrolysis, Banana rachis, Pretratamiento con agua líquida comprimida, Pretreatment

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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