Abstract
| Original language | English |
|---|---|
| Title of host publication | Proceedings of 11th European Workshop on Lignocellulosics and Pulp |
| Subtitle of host publication | Proceedings |
| Pages | 153-157 |
| Publication status | Published - 2010 |
| MoE publication type | Not Eligible |
| Event | 11th European Workshop on Lignocellulosics and Pulp, EWLP 2010 - Hamburg, Germany Duration: 16 Aug 2010 → 19 Aug 2010 Conference number: 11 |
Workshop
| Workshop | 11th European Workshop on Lignocellulosics and Pulp, EWLP 2010 |
|---|---|
| Abbreviated title | EWLP 2010 |
| Country | Germany |
| City | Hamburg |
| Period | 16/08/10 → 19/08/10 |
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Keywords
- Extraction
- xylan
- lignin
- xylanase
- endoglucanase
- enzyme
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Enzyme-assisted extraction of hemicelluloses and lignin from organosolv pulps. / Hakala, Terhi; Hyvärinen, Sari; Liitiä, Tiina; Suurnäkki, Anna.
Proceedings of 11th European Workshop on Lignocellulosics and Pulp: Proceedings. 2010. p. 153-157.Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific
TY - GEN
T1 - Enzyme-assisted extraction of hemicelluloses and lignin from organosolv pulps
AU - Hakala, Terhi
AU - Hyvärinen, Sari
AU - Liitiä, Tiina
AU - Suurnäkki, Anna
N1 - Projekti: Afore - Forest biorefineries: Added-value from chemicals and polymers by new integrated separation, fractionation and upgrading technologies Project code: 27110
PY - 2010
Y1 - 2010
N2 - Wood hemicellulose components, xylan and glucomannan, as well as lignin are interesting starting components for material applications, chemicals and liquid fuels. Thus, efficient and selective separation of these components from wood, pulp or process waters is of interest. With hydrolytic enzymes i.e. hemicellulases and cellulases the different carbohydrate components from lignocellulosic raw materials and pulps can be selectively decomposed. In this study enzymatic treatments were applied to enhance the lignin extraction from organosolv pulps. Organosolv pulps were obtained by cooking wood chips with the Lignofibre (LGF) process with acetic acid and phosphinic acid as catalyst. With the Lignofibre process it is possible to produce lignin rich, strong fibers with high yield. The enzymatic treatments were carried out before alkali extraction of the pulp to enhance the extraction efficiency. The extracted lignin was further isolated by ultrafiltration of the extraction liquor. The effect of enzyme treatment on the quality of the isolated components was assessed by analyzing the molar mass distribution of the isolated fractions using size-exclusion chromatography (SEC). The lignin content of the xylanase treated alkali-extracted pulp was lower than that of the reference pulp indicating that the enzyme treatment enhanced the alkaline extraction of lignin. The xylanase treatment affected also the molar mass distribution of the extracted lignin.
AB - Wood hemicellulose components, xylan and glucomannan, as well as lignin are interesting starting components for material applications, chemicals and liquid fuels. Thus, efficient and selective separation of these components from wood, pulp or process waters is of interest. With hydrolytic enzymes i.e. hemicellulases and cellulases the different carbohydrate components from lignocellulosic raw materials and pulps can be selectively decomposed. In this study enzymatic treatments were applied to enhance the lignin extraction from organosolv pulps. Organosolv pulps were obtained by cooking wood chips with the Lignofibre (LGF) process with acetic acid and phosphinic acid as catalyst. With the Lignofibre process it is possible to produce lignin rich, strong fibers with high yield. The enzymatic treatments were carried out before alkali extraction of the pulp to enhance the extraction efficiency. The extracted lignin was further isolated by ultrafiltration of the extraction liquor. The effect of enzyme treatment on the quality of the isolated components was assessed by analyzing the molar mass distribution of the isolated fractions using size-exclusion chromatography (SEC). The lignin content of the xylanase treated alkali-extracted pulp was lower than that of the reference pulp indicating that the enzyme treatment enhanced the alkaline extraction of lignin. The xylanase treatment affected also the molar mass distribution of the extracted lignin.
KW - Extraction
KW - xylan
KW - lignin
KW - xylanase
KW - endoglucanase
KW - enzyme
M3 - Conference article in proceedings
SP - 153
EP - 157
BT - Proceedings of 11th European Workshop on Lignocellulosics and Pulp
ER -