Studies on lignin extraction from rice husk by a soda-ethanol treatment: kinetics, separation, and characterization of products

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The delignification kinetics of lignocellulosic waste is an important tool for the study of the technical-economic viability of biorefinery processes. The aim of this work was to study the kinetic of lignin extraction by a soda-ethanol treatment of hemicelluloses-free rice husk, within the framework...

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Autores principales: Dagnino, Eliana P., Chamorro, Ester, Felissia, Fernando E., Area, María Cristina
Formato: Artículo publishedVersion
Lenguaje:Inglés
Inglés
Publicado: 2020
Materias:
delignification
soda-ethanol-water process
kinetic
rice husk
biorefinery
Acceso en línea:http://hdl.handle.net/20.500.12272/4443
https://doi.org/10.1016/j.cherd.2017.10.026
Aporte de:
RIA - Repositorio Institucional Abierto (UTN) de Universidad Tecnológica Nacional
id I68-R174-20.500.12272-4443
record_format dspace
institution Universidad Tecnológica Nacional
institution_str I-68
repository_str R-174
collection RIA - Repositorio Institucional Abierto (UTN)
language Inglés
Inglés
topic delignification
soda-ethanol-water process
kinetic
rice husk
biorefinery
spellingShingle delignification
soda-ethanol-water process
kinetic
rice husk
biorefinery
Dagnino, Eliana P.
Chamorro, Ester
Felissia, Fernando E.
Area, María Cristina
Studies on lignin extraction from rice husk by a soda-ethanol treatment: kinetics, separation, and characterization of products
topic_facet delignification
soda-ethanol-water process
kinetic
rice husk
biorefinery
description The delignification kinetics of lignocellulosic waste is an important tool for the study of the technical-economic viability of biorefinery processes. The aim of this work was to study the kinetic of lignin extraction by a soda-ethanol treatment of hemicelluloses-free rice husk, within the framework of a biorefinery. Additionally, the type of phenolic structures in the extracted lignin and the behavior of inorganics were evaluated. The kinetic study was carried out at 140, 150, and 160 °C, at different times between 3 and 100 min of reaction for each temperature. A first order kinetic model was adjusted to the experimental data of residual lignin in the treated solid in the fast and slow phase. The kinetic constant k0 varied from 0.021 to 0.035 min−1 for 140–160 °C. The activation energies were 38.59 kJ/mol and 33.47 kJ/mol for the fast and slow phase, respectively. The inorganics components remained in the solid and the proportion of silicon increased through all treatments. About 50% of the initial lignin with 1% of inorganics was recovered by precipitation. The percentage of total OH in lignin remained high, about 8.5%, and decreased with the temperature but not with the time of the reaction.
format Artículo
publishedVersion
author Dagnino, Eliana P.
Chamorro, Ester
Felissia, Fernando E.
Area, María Cristina
author_facet Dagnino, Eliana P.
Chamorro, Ester
Felissia, Fernando E.
Area, María Cristina
author_sort Dagnino, Eliana P.
title Studies on lignin extraction from rice husk by a soda-ethanol treatment: kinetics, separation, and characterization of products
title_short Studies on lignin extraction from rice husk by a soda-ethanol treatment: kinetics, separation, and characterization of products
title_full Studies on lignin extraction from rice husk by a soda-ethanol treatment: kinetics, separation, and characterization of products
title_fullStr Studies on lignin extraction from rice husk by a soda-ethanol treatment: kinetics, separation, and characterization of products
title_full_unstemmed Studies on lignin extraction from rice husk by a soda-ethanol treatment: kinetics, separation, and characterization of products
title_sort studies on lignin extraction from rice husk by a soda-ethanol treatment: kinetics, separation, and characterization of products
publishDate 2020
url http://hdl.handle.net/20.500.12272/4443
https://doi.org/10.1016/j.cherd.2017.10.026
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