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Enzymatic pulp upgrade for producing high-value cellulose out of a Kraft paper pulp.
- Source :
-
Enzyme and microbial technology [Enzyme Microb Technol] 2017 Jul; Vol. 102, pp. 67-73. Date of Electronic Publication: 2017 Apr 02. - Publication Year :
- 2017
-
Abstract
- The high-yield separation of polymeric parts from wood-derived lignocellulosic material is indispensable in biorefinery concepts. For the separation of cellulose and xylan from hardwood paper pulps to obtain pulps of high cellulose contents, simple alkaline extractions were found to be the most suitable technology, although having certain limitations. These are embodied by residual alkali resistant xylan incorporated in the pulp matrix. Further purification in order to produce pure cellulose with a low uniformity could be achieved selectively degrading residual xylan and depolymerizing the cellulose macromolecules by xylanase and cellulase. The latter help to adjust cellulose chain lengths for certain dissolving pulp grades while reducing the demand for ozone in subsequent TCF bleaching. Experiments applying different commercially available enzyme preparations revealed the dependency of xylanase performance on the residual xylan content in pulps being stimulated by additional cellulase usage. The action of the latter strongly depends on the cellulose allomorphy confirming the impact of the pulp morphology. Hence, the combined application of both types of enzymes offers a high potential for upgrading pulps in order to produce a pure and high-value cellulose product.<br /> (Copyright © 2017 Elsevier Inc. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1879-0909
- Volume :
- 102
- Database :
- MEDLINE
- Journal :
- Enzyme and microbial technology
- Publication Type :
- Academic Journal
- Accession number :
- 28465063
- Full Text :
- https://doi.org/10.1016/j.enzmictec.2017.03.014