Delignification of prehydrolyzed straw by one-step, high-consistency chlorination

Oreopoulou, V; Economides, DG; Koukios, EG

dc.contributor.author	Oreopoulou, V	en
dc.contributor.author	Economides, DG	en
dc.contributor.author	Koukios, EG	en
dc.date.accessioned	2014-03-01T01:06:33Z
dc.date.available	2014-03-01T01:06:33Z
dc.date.issued	1986	en
dc.identifier.issn	0196-4321	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9475
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Engineering, Industrial	en
dc.title	Delignification of prehydrolyzed straw by one-step, high-consistency chlorination	en
heal.type	journalArticle	en
heal.identifier.primary	10.1021/i300023a017	en
heal.identifier.secondary	http://dx.doi.org/10.1021/i300023a017	en
heal.language	English	en
heal.publicationDate	1986	en
heal.abstract	Barley straw, mildly prehydrolyzed by dilute mineral acid, was delignified by a chlorine-containing gas stream at high consistency. The effects of time, temperature, flow rate, chlorine concentration in the gas stream, and particle size of straw on the one-step conversion of straw lignin to alkali-soluble products were investigated. On the basis of experimental data, various kinetic models were tested. The rate-controlling step was found to be internal diffusion of chlorine through the layer of the reacted lignocellulose. A non-Fickean expression was used to fit the experimentally determined values of the diffusion coefficient. In confirmation to the kinetic analysis in this work, experiments of stagewise chlorination with intermediate extraction by a highly selective solvent resulted in increased delignification. However, one-step chlorination of prehydrolyzed material is shown to be very efficient in producing substantially delignified straw pulps. © 1986 American Chemical Society.	en
heal.publisher	AMER CHEMICAL SOC	en
heal.journalName	Industrial and Engineering Chemistry Product Research and Development	en
dc.identifier.doi	10.1021/i300023a017	en
dc.identifier.isi	ISI:A1986E224800017	en
dc.identifier.volume	25	en
dc.identifier.issue	3	en
dc.identifier.spage	463	en
dc.identifier.epage	469	en