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Initial phase of sodium bisulphite pulping of spruce. Part I
RISE - Research Institutes of Sweden. Karlstad University, Sweden. (MoRe Research Ömsköldsvik AB)
RISE - Research Institutes of Sweden. (MoRe Research Ömsköldsvik AB)
Domsjö Fabriker, Sweden.
Karlstad University, Sweden.
2016 (English)In: Cellulose Chemistry and Technology, ISSN 0576-9787, Vol. 50, no 2, p. 293-300Article in journal (Refereed) Published
Abstract [en]

A sodium bisulphite cooking study has been performed on spruce chips with the aim of monitoring the impregnation and the initial phase of such a cook performed at pH 4.5. Both pulp and liquor analyses have been carried out and the experiments have been done with a laboratory-prepared cooking acid, in comparison with a mill cooking acid. The pulping experiments have been performed down to a total pulp yield of 60%. The objective was to verify and extend the current knowledge of bisulphite pulping with a focus on the initial phase of the cook. With the help of a kinetic model that has been developed in the project, the pulp composition during the cook with respect to cellulose, lignin, glucomannan and xylan can now be predicted. The side reactions with respect to thiosulphate formation were also analyzed in this study.

Place, publisher, year, edition, pages
Editura Academiei Romane , 2016. Vol. 50, no 2, p. 293-300
Keywords [en]
Bisulphite cooking, Cellulose, Glucomannan, Kinetics, Lignin, Spruce, Thiosulphate and xylan, Enzyme kinetics, Sodium, Kinetic modeling, Pulp composition, Side reactions, Sodium bisulphite, Thiosulphates, Total pulp yield, Pulp cooking, Glucomannans, Heating, Lignins
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-42475Scopus ID: 2-s2.0-84977630887OAI: oai:DiVA.org:ri-42475DiVA, id: diva2:1384045
Note

Funding details: Kempestiftelserna; Funding details: Stiftelsen för Kunskaps- och Kompetensutveckling, KK; Funding text 1: This study was performed within the Industrial Graduate School VEPP (Values Created in Fibre-Based Processes and Products) with financial support from the Knowledge Foundation, Sweden. Thanks are due to the financial contribution from Domsj?Fabriker and MoRe Research in ?msk?ldsvik, Sweden. The authors are also grateful for the support of the project from the Kempe Foundations in ?msk?ldsvik, Sweden, for the constructive criticism on the manuscript from Stefan Svensson of MoRe Research and Kristina Elg Christoffersson of Domsj? Fabriker and to PhD Venkatesh Govindrajan for the linguistic correction of the final manuscript.

Available from: 2020-01-09 Created: 2020-01-09 Last updated: 2020-01-09Bibliographically approved

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