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Integration of a kraft pulping mill into a forest biorefinery: pre-extraction of hemicellulose by steam explosion versus steam treatment.
- Source :
-
Bioresource technology [Bioresour Technol] 2014 Feb; Vol. 153, pp. 236-44. Date of Electronic Publication: 2013 Dec 08. - Publication Year :
- 2014
-
Abstract
- Growing interest in alternative and renewable energy sources has brought increasing attention to the integration of a pulp mill into a forest biorefinery, where other products could be produced in addition to pulp. To achieve this goal, hemicelluloses were extracted, either by steam explosion or by steam treatment, from Eucalyptus globulus wood prior to pulping. The effects of both pre-treatments in the subsequent kraft pulping and paper strength were evaluated. Results showed a similar degree of hemicelluloses extraction with both options (32-67% of pentosans), which increased with the severity of the conditions applied. Although both pre-treatments increased delignification during pulping, steam explosion was significantly better: 12.9 kappa number vs 22.6 for similar steam unexploded pulps and 40.7 for control pulp. Finally, similar reductions in paper strength were found regardless of the type of treatment and conditions assayed, which is attributed to the increase of curled and kinked fibers.<br /> (Copyright © 2013 Elsevier Ltd. All rights reserved.)
- Subjects :
- Cellulose chemistry
Chemical Fractionation
Eucalyptus drug effects
Hydrolysis drug effects
Lignin chemistry
Sodium Hydroxide pharmacology
Tensile Strength drug effects
Viscosity drug effects
Water chemistry
Wood chemistry
Biotechnology methods
Eucalyptus chemistry
Paper
Polysaccharides isolation & purification
Steam
Trees chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 153
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 24368272
- Full Text :
- https://doi.org/10.1016/j.biortech.2013.11.088