Investigation on the Influence of the Alkaline Preextraction of Hemicelluloses on the Properties of Rice Straw Soda-AQ Pulp

Document Type : Research Paper

Authors

1 MSc Student, Department of Wood and Paper Science and Technology, Faculty of Natural Resources, University of Tehran.

2 Assistant Professor, Department of Wood and Paper Science and Technology, Faculty of Natural Resources, University of Tehran.

3 Assistant Professor, Department of, Wood and Paper Science and Technology Faculty of Agriculture and Natural Resources, Gonbad Kavous University

Abstract

The effect of partial pre-extraction of hemicelluloses on the properties of rice straw soda-AQ pulp to produce
valuable by products from this pre-extraction was investigated. The pre-extraction conditions were conducted
using 10% sodium hydroxide (based on dry weight of the rice straw), at 50 °C for 90 minutes to reach the
extraction rate of 48.1% of the hemicelluloses. Soda-AQ pulping was performed under different conditions at
pre-determined pulping time and liquor to straw ratios. The optimum pulping conditions was found as 14%
active alkali, 160 °C and 45 minutes pulping time. Comparasion of per-extracted materials with the normal rice
straw indicated that to achieve the same kappa number and yield, the pretreated material requires less alkali and
cooking time. The results showed that pre-extraction marginally reduced the tensile strength index of the pulp
which the difference was not statistically significant with control pulping condition. However, the burst strength
index of pre-extracted pulp and control was identical. The overall mechanical properties of pretreated pulp were
the same as the control.

Keywords

References

[1].          Helmerius, J., Vinblad, J., Rova, U., Berglund, K.A., and Hodge, D. B. (2010). Impact of hemicellulose pre-extraction for bioconversion on birch Kraft pulp properties, Bioresource Technology, 101: 5996–6005.
[2].          Huang, H.J., Ramaswamy, S., Al-Dajani, W.W., and Tschirner, U. (2010). Process modeling and analysis of pulp mill-based integrated biorefinery with hemicellulose pre- extraction for ethanol production: a comparative study. Bioresources Technology, 101: 624–631.
[3].          Lopez, S., Tissot, M., and Dela, M. (1996). Integrated cereal straw valorization by an alkaline pre-extraction of hemicelluloses prior to soda-antraqinone pulping. Case study of barley straw. Biomass and Bioenergy, 10: (4) 201-211.
[4].          AL-Djani, W.W., and Teschirner, U. (2008). Alkaline extraction of hemicelluloses from aspen chips and its impact on subsequent kraft pulping. University of Minnesota, Dept. of Bioproduct and Bio Systems Engineering, Sant Paul, MN 55108, USA
[5].          Sarwar Jahan, M., Saeed, Abrar, Ni, Yonghao, and He, Zhibin. (2009). Pre-extraction and its impact on the alkaline pulping of bagasse. Journal of Biobased Materials and Bioenergy, 3: (4) 380-385.
[6].          Zhang, H., and Yung, R.A. (2011). Effect of hot water pre-extraction on alkaline pulping and properties of wheat straw. Advance Material Research, 236-238: 1174-1177.
[7].          Binod, P., Sindhu, R., and Singhania, R.R. (2010). Bioethanol production from rice straw: An overview. Bioresource Technology, 101: 4767–4774.
[8].          Hedjazi, S. (2005). Investigation on alkaline sulfite-anthraquinone (AS/AQ) pulping and total chlorine free (TCF) bleaching of most important iranian agriculture residues, Ph.D.Thesis, University of Tehran.
[9].          Mohammadi, N. (2012). Investigation on the potential of barley straw in an integrated biorefinery system, MSc. Thesis, University of Tehran.
[10].      Yoon, S.H., and Heiningen, A.R.P. (2008). Kraft pulping and papermaking properties of hot-water pre-extracted loblolly pine in an integrated forest products biorefinery. TAPPI Journal, 7: 22-27
[11].      Zhuang, J., Lin, L., Liu, J., Luo, X., Pang, C., and Ouyang, P. (2009). Preparation of xylose and kraft pulp from poplar based on formic/acetic acid/ water system hydrolysis. BioResource, 4(3): 1147-1157.
[12].      Cheng, H., Zhang, H., Fu, S., and Lusia, L. A. (2010). Alkaline extraction of hemicelluloses from depithed corn stover and effects on soda-AQ pulping. Bioresources, 11(1): 196-206.
[13].      Hedjazi, S., Kordsachia, O., Jahan Latibari, A., and Tschirner, U. (2009). Alkaline sulphite/anthraquinone (AS/AQ) pulping of rice straw and TCF bleaching of pulps, APPITA Journal, 62: (2).137-145.
[14].      Lu, H., Hu, R., Ward, A., Amidon, T.E., Liang, B., and Liu, Sh. (2012). Hot-water extraction and its effect on soda pulping of aspen wood chips. Biomass and Bioenergy, 39: 5-13.
[15].      Duarte, G. V., Ramarao, B. V., Amidon, T. E., and Ferreira, P. T. (2011). Effect of hot water extraction on hardwood kraft pulp fibers. Industrial & Engineering Chemistry Research, 50: 9949–9959.
[16].      Lei, Y., Liu, S., Li, J., and Sun, R. (2010). Effect of hot water extraction on alkaline pulping of bagasse. Biotechnology Advance, 28: (5) 609-612.

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