Photobleaching of eucalyptus kraft pulps. Thermogravimetric monitoring

Barneto, A. G.; Ariza, María; Vidal Lluciá, Teresa; Ariza, J.

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Document typeConference lecture

Date issued2014

Rights accessRestricted access - publisher's policy

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

CitationBarneto, A. [et al.]. Photobleaching of eucalyptus kraft pulps. Thermogravimetric monitoring. A: European Workshop on Lignocellulosics and Pulp. "Proceedings of the 13th European workshop on Lignocellulosics and pulp". Sevilla: 2014, p. 195-198.

URIhttp://hdl.handle.net/2117/23467

ISBN978-84-616-9842-4

Publisher versionhttp://www.irnas.csic.es/users/delrio/Proceedings-13thEWLP.pdf

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