Biorefining of Scots pine using neutral sodium sulphite pulping: investigation of fibre and spent liquor compositions

Saara Hanhikoski; Klaus Niemelä; Tapani Vuorinen

doi:10.1016/j.indcrop.2018.11.060

Biorefining of Scots pine using neutral sodium sulphite pulping: investigation of fibre and spent liquor compositions

Saara Hanhikoski (Corresponding Author), Klaus Niemelä, Tapani Vuorinen

Research output: Contribution to journal › Article › Scientific › peer-review

Abstract

Neutral sulphite pulping of softwood as a potential biorefinery was investigated, by producing pulps at two main yield levels (55–65% and 75–85%) under various process conditions and by analysing the composition of the resulting fibre fractions and pulping spent liquors. It was found that both delignification rate and selectivity were enhanced by addition of anthraquinone (AQ 0.1% on o.d. wood) whereas delignification was accelerated by higher temperature (180 °C vs. 170 °C) and initial liquor pH (10 vs. 7). The established conditions preserved significant amount of carbohydrates, especially galactoglucomannan, in the fibres at the selected yield levels. At the yield level of 65%, still over 60% of galactoglucomannan was detected in the pulps whereas 50–70% of lignin was removed. In the spent liquors, lignosulphonates as the principal component represented the possible source of by-product in addition to acetic and formic acids.

Original language	English
Pages (from-to)	135-141
Journal	Industrial Crops and Products
Volume	129
DOIs	https://doi.org/10.1016/j.indcrop.2018.11.060
Publication status	Published - Mar 2019
MoE publication type	Not Eligible

Fingerprint

sulfite pulping

sodium sulfite

biorefining

Pinus sylvestris

delignification

pulp

lignosulfonates

pulping

anthraquinones

formic acid

softwood

lignin

carbohydrates

temperature

Keywords

Anthraquinone
Galactoglucomannan
Neutral sulfite pulping
Sulfite spent liquor
Softwood

Cite this

Hanhikoski, S., Niemelä, K., & Vuorinen, T. (2019). Biorefining of Scots pine using neutral sodium sulphite pulping: investigation of fibre and spent liquor compositions. Industrial Crops and Products, 129, 135-141. https://doi.org/10.1016/j.indcrop.2018.11.060

Hanhikoski, Saara ; Niemelä, Klaus ; Vuorinen, Tapani. / Biorefining of Scots pine using neutral sodium sulphite pulping : investigation of fibre and spent liquor compositions. In: Industrial Crops and Products. 2019 ; Vol. 129. pp. 135-141.

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abstract = "Neutral sulphite pulping of softwood as a potential biorefinery was investigated, by producing pulps at two main yield levels (55–65{\%} and 75–85{\%}) under various process conditions and by analysing the composition of the resulting fibre fractions and pulping spent liquors. It was found that both delignification rate and selectivity were enhanced by addition of anthraquinone (AQ 0.1{\%} on o.d. wood) whereas delignification was accelerated by higher temperature (180 °C vs. 170 °C) and initial liquor pH (10 vs. 7). The established conditions preserved significant amount of carbohydrates, especially galactoglucomannan, in the fibres at the selected yield levels. At the yield level of 65{\%}, still over 60{\%} of galactoglucomannan was detected in the pulps whereas 50–70{\%} of lignin was removed. In the spent liquors, lignosulphonates as the principal component represented the possible source of by-product in addition to acetic and formic acids.",

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Hanhikoski, S , Niemelä, K & Vuorinen, T 2019, 'Biorefining of Scots pine using neutral sodium sulphite pulping: investigation of fibre and spent liquor compositions', Industrial Crops and Products, vol. 129, pp. 135-141. https://doi.org/10.1016/j.indcrop.2018.11.060

Biorefining of Scots pine using neutral sodium sulphite pulping : investigation of fibre and spent liquor compositions. / Hanhikoski, Saara (Corresponding Author); Niemelä, Klaus; Vuorinen, Tapani.

In: Industrial Crops and Products, Vol. 129, 03.2019, p. 135-141.

Research output: Contribution to journal › Article › Scientific › peer-review

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