CHARACTERIZATION OF THE HEMICELLULOSIC FRACTION OBTAINED AFTER PRE-HYDROLYSIS OF PINUS RADIATA WOOD CHIPS WITH HOT-WATER AT DIFFERENT INITIAL PH

Hemicelluloses from Pinus radiata wood chips were extracted using different conditions of temperature, time and initial pH of water (120 to 170°C, 30 to 120 min and pH 2 to 12, respectively). Results showed that hemicelluloses represented 26% of wood dry weight and, from this amount, hexoses are res...

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Autores principales:	REYES,PABLO, TEIXEIRA MENDONÇA,REGIS, RODRÍGUEZ,JAIME, FARDIM,PEDRO, VEGA,BEATRIZ
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2013
Materias:	Pinus radiata hemicelluloses galactoglucomannans biorefinery
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072013000100024
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spelling	oai:scielo:S0717-970720130001000242014-09-09CHARACTERIZATION OF THE HEMICELLULOSIC FRACTION OBTAINED AFTER PRE-HYDROLYSIS OF PINUS RADIATA WOOD CHIPS WITH HOT-WATER AT DIFFERENT INITIAL PHREYES,PABLOTEIXEIRA MENDONÇA,REGISRODRÍGUEZ,JAIMEFARDIM,PEDROVEGA,BEATRIZ Pinus radiata hemicelluloses galactoglucomannans biorefinery Hemicelluloses from Pinus radiata wood chips were extracted using different conditions of temperature, time and initial pH of water (120 to 170°C, 30 to 120 min and pH 2 to 12, respectively). Results showed that hemicelluloses represented 26% of wood dry weight and, from this amount, hexoses are responsible for 64% of its composition. The analysis of extraction results showed that pH has a low effect in disassembling hemicelluloses from wood, and that time and temperature of reaction were the most important parameters. Maximal amount of hemicellulose extracted in the most severe conditions tested was between 12-16% (on wood basis). In these conditions approximately 40-50% of the hemicellulose in wood was solubilized. As observed by SEC analysis, the recovered hemicellulosic fractions were in the form of low molar mass oligomers with Mw varying from 3720 to 54300 g/mol. The FT-IR spectra show peak multiplicity between 1120 and 1000 cm-1 that is a typical characteristic of carbohydrates and only alkaline-extracted hemicelluloses showed the presence of lignin with a characteristic peak at 1509 cm-1.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.58 n.1 20132013-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072013000100024en10.4067/S0717-97072013000100024
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Pinus radiata hemicelluloses galactoglucomannans biorefinery
spellingShingle	Pinus radiata hemicelluloses galactoglucomannans biorefinery REYES,PABLO TEIXEIRA MENDONÇA,REGIS RODRÍGUEZ,JAIME FARDIM,PEDRO VEGA,BEATRIZ CHARACTERIZATION OF THE HEMICELLULOSIC FRACTION OBTAINED AFTER PRE-HYDROLYSIS OF PINUS RADIATA WOOD CHIPS WITH HOT-WATER AT DIFFERENT INITIAL PH
description	Hemicelluloses from Pinus radiata wood chips were extracted using different conditions of temperature, time and initial pH of water (120 to 170°C, 30 to 120 min and pH 2 to 12, respectively). Results showed that hemicelluloses represented 26% of wood dry weight and, from this amount, hexoses are responsible for 64% of its composition. The analysis of extraction results showed that pH has a low effect in disassembling hemicelluloses from wood, and that time and temperature of reaction were the most important parameters. Maximal amount of hemicellulose extracted in the most severe conditions tested was between 12-16% (on wood basis). In these conditions approximately 40-50% of the hemicellulose in wood was solubilized. As observed by SEC analysis, the recovered hemicellulosic fractions were in the form of low molar mass oligomers with Mw varying from 3720 to 54300 g/mol. The FT-IR spectra show peak multiplicity between 1120 and 1000 cm-1 that is a typical characteristic of carbohydrates and only alkaline-extracted hemicelluloses showed the presence of lignin with a characteristic peak at 1509 cm-1.
author	REYES,PABLO TEIXEIRA MENDONÇA,REGIS RODRÍGUEZ,JAIME FARDIM,PEDRO VEGA,BEATRIZ
author_facet	REYES,PABLO TEIXEIRA MENDONÇA,REGIS RODRÍGUEZ,JAIME FARDIM,PEDRO VEGA,BEATRIZ
author_sort	REYES,PABLO
title	CHARACTERIZATION OF THE HEMICELLULOSIC FRACTION OBTAINED AFTER PRE-HYDROLYSIS OF PINUS RADIATA WOOD CHIPS WITH HOT-WATER AT DIFFERENT INITIAL PH
title_short	CHARACTERIZATION OF THE HEMICELLULOSIC FRACTION OBTAINED AFTER PRE-HYDROLYSIS OF PINUS RADIATA WOOD CHIPS WITH HOT-WATER AT DIFFERENT INITIAL PH
title_full	CHARACTERIZATION OF THE HEMICELLULOSIC FRACTION OBTAINED AFTER PRE-HYDROLYSIS OF PINUS RADIATA WOOD CHIPS WITH HOT-WATER AT DIFFERENT INITIAL PH
title_fullStr	CHARACTERIZATION OF THE HEMICELLULOSIC FRACTION OBTAINED AFTER PRE-HYDROLYSIS OF PINUS RADIATA WOOD CHIPS WITH HOT-WATER AT DIFFERENT INITIAL PH
title_full_unstemmed	CHARACTERIZATION OF THE HEMICELLULOSIC FRACTION OBTAINED AFTER PRE-HYDROLYSIS OF PINUS RADIATA WOOD CHIPS WITH HOT-WATER AT DIFFERENT INITIAL PH
title_sort	characterization of the hemicellulosic fraction obtained after pre-hydrolysis of pinus radiata wood chips with hot-water at different initial ph
publisher	Sociedad Chilena de Química
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072013000100024
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_version_	1718445483100209152

CHARACTERIZATION OF THE HEMICELLULOSIC FRACTION OBTAINED AFTER PRE-HYDROLYSIS OF PINUS RADIATA WOOD CHIPS WITH HOT-WATER AT DIFFERENT INITIAL PH

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