Photobleaching of eucalyptus kraft pulps. Thermogravimetric monitoring

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Title:	Photobleaching of eucalyptus kraft pulps. Thermogravimetric monitoring
Author:	Barneto, A. G.; Ariza, María; Vidal Lluciá, Teresa; Ariza, J.
Other authors:	Universitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera; Universitat Politècnica de Catalunya. CELBIOTECH - Grup de Recerca: Enginyeria Paperera
Abstract:	This study assesses the potential of UV light as method to bleach eucalyptus pulps in different steps of their chemical bleaching process in a pulp mill. Higher brightness increasing were obtained on dirtier pulps, that is, alkaline washed and oxygen delignified pulps. In any case, photobleaching shows first-order kinetics. Rate of chromophores removal is proportional to the chromophores content in fiber surface. Complementarily, thermogravimetric analysis proved that UV light (400 nm wavelength) do not damages fiber integrity
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria paperera::Pasta paperera::Blanqueig de pastes -Wood-pulp--Bleaching -Sulfate pulping process -Pasta de paper -- Blanqueig
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Document type:	Article - Published version Conference Object
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