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https://hdl.handle.net/1822/8131
Título: | Hydrogen peroxide bleaching of cellulose pulps obtained from brewer’s spent grain |
Autor(es): | Mussatto, Solange I. Rocha, George J. M. Roberto, Inês Conceição |
Palavras-chave: | Bleaching Brewer’s spent grain Cellulose Hydrogen peroxide Pulp |
Data: | Ago-2008 |
Editora: | Springer |
Revista: | Cellulose |
Citação: | "Cellulose". ISSN 0969-0239. 15:4 (2008) 641-649. |
Resumo(s): | Brewer’s spent grain (BSG) was evaluated for bleached pulp production. Two cellulose pulps with different chemical compositionswere produced by soda pulping: one from the original raw material and the other from material pretreated by dilute acid. Both of them were bleached by a totally chlorine-free sequence performed in three stages, using 5% hydrogen peroxide in the two initial, and a 0.25 NNaOHsolution in the last one. Chemical composition, kappa number, viscosity, brightness and yield of bleached and unbleached pulps were evaluated. The high hemicellulose (28.4% w/w) and extractives (5.8% w/w) contents in original BSG affected the pulping and bleaching processes.However, soda pulping of acid pretreated BSG gave a celluloserich pulp (90.4% w/w) with low hemicellulose and extractives contents (7.9% w/w and <3.4% w/w, respectively), which was easily bleached achieving a kappa number of 11.21, viscosity of 3.12 cp, brightness of 71.3%, cellulose content of 95.7% w/w, and residual lignin of 3.4% w/w. Alkaline and oxidative delignification of acid pretreated BSG was found as an attractive approach for producing high-purity, chlorine-free cellulose pulp. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/8131 |
DOI: | 10.1007/s10570-008-9198-4 |
ISSN: | 0969-0239 1572-882X |
Versão da editora: | 'The original publication is available at www.springerlink.com' http://springerlink.com/content/l114g88130h30250/ |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Mussatto_Cellulose[1].pdf | 426,94 kB | Adobe PDF | Ver/Abrir |