Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/5588
Título: Arundo donax L. reed: new perspectives for pulping and bleaching. 5. Ozone-based TCF bleaching of organosolv pulps
Autor: Shatalov, A.A.
Pereira, H.
Palavras-chave: giant reed
Arundo donax L.
non-wood fibres
ozone bleaching
organosolv pulping
Data: 2008
Editora: Elsevier
Citação: "Bioresource Technology". ISSN 0960-8524. 99 (2008) 472-478
Resumo: Three selected alkali-based organosolv pulps (alkali-sulWte-anthraquinone-methanol (ASAM), alkali-anthraquinone-methanol (organocell) and ethanol-soda) from agroWbre crop giant reed (Arundo donax L.) were bleached by an ozone-based TCF (totally chlorinefree) bleaching sequence AZERQP (where A is an acidic pulp pre-treatment, Z is an ozone stage, (ER) is an alkaline extraction in the presence of reducing agent, Q is a pulp chelating, P is a hydrogen peroxide stage) without oxygen pre-bleaching, and compared with a conventional kraft pulp used as a reference. The diVerent response on bleaching conditions within each bleaching stage was noted for all tested pulps. The pulp bleachability, in terms of brightness improvement or lignin removal per unit of applied chemicals, was found higher for the organocell pulp. The ASAM and ethanol-soda pulps showed the highest bleaching selectivity, expressed by viscosity loss per unit of lignin removed or brightness improved. The overall bleaching results of organosolv pulps were superior to kraft.
Peer review: yes
URI: http://hdl.handle.net/10400.5/5588
ISSN: 0960-8524
Aparece nas colecções:CEF - Artigos de Revistas

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