Investigation on the Influence of Alkaline Pre-Extraction of Barley Straw on Soda and Monoethanolamine Pulps Properties

Document Type : Research Paper

Authors

1 M.Sc. student, Department of wood science & technology, Faculty of natural resources, University of Tehran, Karaj, Iran

2 Associate Prof., Department of wood science & technology, Faculty of natural resources, University of Tehran, Karaj, Iran

3 Professor, Department of wood science & technology, Faculty of natural resources, University of Tehran, Karaj, Iran

Abstract

In this study, the alkaline pre-extraction followed with soda and monoethanolamine pulping of barley straw was investigated. The pre-extraction stage with removal of 34percent hemicelluloses due to highest yield was selected as optimum treatment. The results of pulping show that pre-extraction stage resulted in decrease of yield in both pulping processes meanwhile only in soda process the kappa number was influenced with pre-extraction stage. Tensile and burst indices of pulps drop because of pre-extraction stage. Unlike of these indices, the tear index of soda pulp from pre-extracted barley straw has been increased. The brightness of soda pulp from pre-extracted barley straw is increased while the pre-extraction stage has no significant effect on brightness of monoethanolamine pulps. The opacity of pulps remains unchanged after pre-extraction.

Keywords

Main Subjects

References

[1] Cherubini, F., 2010. Using biomass instead of oil for producing energy. Energy conversion and Management, 51, 1412-1421.
[2] Huang, H., Ramaswamy, S., Al-Dajani, WW. and Tschirner, U., 2010.  Process modeling and analysis of pulp mill-based integrated biorefinery with hemicelluloses pre-extraction for ethanol production: A comparative study. Bioresource Technology, 101: 624-631.
[3] Huang, H., Ramsawamy, S., Tschirner, U. and Ramarao, B., 2008.  A review of separation technologies in current and future biorefineries. Separation and purification technology, 62: 1-21.
[4] Amidon, T.E., 2006.  The biorefinery in New York: woody biomass into commercial ethanol, 107(6): 47-50.
[5] Al-Dajani, W. W. and Tschirner, U. W., 2008.  Pre-extraction of hemicelluloses and subsequent kraft pulping Part I: Alkaline extraction. Tappi Journal, 7(6): 3-8.
[6] Helmeris, J., Walter, J., Rova, U., Breglund, K. A. and Hodge, D. B., 2010.  Impact of hemicelluloses pre-extraction for bioconversion on birch Kraft pulp properties. Bioresource Technology, 101(15): 5996-6005.
[7] Cheng, H., Zhan, H., Fu, S. and  Lucian A. Lucia., 2010.  Alkali extraction of hemicellulose from depithed corn stover and effects on soda-AQ pulping. Bioresources , 11(1):196-206…
[8] De Lopez, S.  Tissot, M. and  Delmas, M.,1996.  Integrated cereal straw valorization by an alkaline pre-extraction of hemicellulose prior to soda-anthraquinone pulping. Case study of barley straw. Biomass and Bioenergy, 10 (4):  201-211. 
Iranian Journal of Wood and Paper Industries
Volume 9, Issue 4
March 2019
Pages 485-495

Files

Share

How to cite

Statistics