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

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

In: Industrial Crops and Products, Vol. 129, 01.03.2019, p. 135-141.

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@article{d39a4078da154deea01f9843281b5b20,
title = "Biorefining of Scots pine using neutral sodium sulphite pulping: investigation of fibre and spent liquor compositions",
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.",
keywords = "Anthraquinone, Galactoglucomannan, Neutral sulfite pulping, Softwood, Sulfite spent liquor",
author = "Saara Hanhikoski and Klaus Niemel{\"a} and Tapani Vuorinen",
year = "2019",
month = "3",
day = "1",
doi = "10.1016/j.indcrop.2018.11.060",
language = "English",
volume = "129",
pages = "135--141",
journal = "Industrial Crops and Products",
issn = "0926-6690",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Biorefining of Scots pine using neutral sodium sulphite pulping

T2 - investigation of fibre and spent liquor compositions

AU - Hanhikoski, Saara

AU - Niemelä, Klaus

AU - Vuorinen, Tapani

PY - 2019/3/1

Y1 - 2019/3/1

N2 - 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.

AB - 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.

KW - Anthraquinone

KW - Galactoglucomannan

KW - Neutral sulfite pulping

KW - Softwood

KW - Sulfite spent liquor

UR - http://www.scopus.com/inward/record.url?scp=85057833692&partnerID=8YFLogxK

U2 - 10.1016/j.indcrop.2018.11.060

DO - 10.1016/j.indcrop.2018.11.060

M3 - Article

VL - 129

SP - 135

EP - 141

JO - Industrial Crops and Products

JF - Industrial Crops and Products

SN - 0926-6690

ER -

ID: 30472411