Two-stage acid-catalyzed fractionation of lignocellulosic biomass in aqueous ethanol systems at low temperatures

Papatheofanous, MG; Billa, E; Koullas, DP; Monties, B; Koukios, EG

dc.contributor.author	Papatheofanous, MG	en
dc.contributor.author	Billa, E	en
dc.contributor.author	Koullas, DP	en
dc.contributor.author	Monties, B	en
dc.contributor.author	Koukios, EG	en
dc.date.accessioned	2014-03-01T01:11:34Z
dc.date.available	2014-03-01T01:11:34Z
dc.date.issued	1995	en
dc.identifier.issn	0960-8524	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11708
dc.subject	Fractionation	en
dc.subject	Organic solvent delignification	en
dc.subject	Prehydrolysis	en
dc.subject	Pulp properties	en
dc.subject	Wheat straw	en
dc.subject.classification	Agricultural Engineering	en
dc.subject.classification	Biotechnology & Applied Microbiology	en
dc.subject.classification	Energy & Fuels	en
dc.subject.other	alcohol	en
dc.subject.other	cellulose	en
dc.subject.other	hemicellulose	en
dc.subject.other	lignin	en
dc.subject.other	monosaccharide	en
dc.subject.other	aqueous solution	en
dc.subject.other	article	en
dc.subject.other	biomass	en
dc.subject.other	catalysis	en
dc.subject.other	fractionation	en
dc.subject.other	low temperature	en
dc.subject.other	priority journal	en
dc.subject.other	straw	en
dc.title	Two-stage acid-catalyzed fractionation of lignocellulosic biomass in aqueous ethanol systems at low temperatures	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0960-8524(95)00152-2	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0960-8524(95)00152-2	en
heal.language	English	en
heal.publicationDate	1995	en
heal.abstract	Wheat straw was fractionated into cellulosic fibres, hemicellulose sugars and solid lignin oligomers through a two-stage, acid-catalyzed process. During the first stage, raw material was treated with dilute H2SO4 (0 . 5-2 . 5 N) at reflux temperature (99 . 5+/-1 . 0 degrees C) for 10-60 min. Subsequently, delignification was conducted with H2SO4 (2 N) in aqueous ethanol (62 . 5-87 . 5% EtOH v/v) at reflux temperature (81 . 0+/-2 . 0 degrees C) for 90 min. Selective hydrolysis of about 50% of the straw hemicelluloses (w/w on original straw hemicelluloses), converted to water-soluble oligo- and monosaccharides (first stage), followed by delignification in 87 . 5% v/v EtOH (second stage), led to optimal component fractionation efficiency with negligible cellulose loss (less than 2% w/w on original straw cellulose) and high lignin removal (more than 70% w/w on original straw lignin). By this two-stage process, high overall fibre yields (more than 60% on original raw material) and good pulp mechanical properties were achieved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Bioresource Technology	en
dc.identifier.doi	10.1016/0960-8524(95)00152-2	en
dc.identifier.isi	ISI:A1995UC25000015	en
dc.identifier.volume	54	en
dc.identifier.issue	3	en
dc.identifier.spage	305	en
dc.identifier.epage	310	en