Títol:
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Photobleaching of eucalyptus kraft pulps. Thermogravimetric monitoring
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Autor/a:
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Barneto, A. G.; Ariza, María; Vidal Lluciá, Teresa; Ariza, J.
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Altres autors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera; Universitat Politècnica de Catalunya. CELBIOTECH - Grup de Recerca: Enginyeria Paperera |
Abstract:
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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 |
Matèries:
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-Àrees temàtiques de la UPC::Enginyeria paperera::Pasta paperera::Blanqueig de pastes -Wood-pulp--Bleaching -Sulfate pulping process -Pasta de paper -- Blanqueig |
Drets:
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Tipus de document:
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Article - Versió publicada Objecte de conferència |
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