Investigation on Soda Oxygen Delignification Reaction Kinetics of Old Corrugated Container (OCC) Pulping

Document Type : Research Paper

Authors

1 Department fo Wood and Paper Sciences and Technology, Islamic Azad Universoty, Karaj Branch, Karaj, Iran

2 Islamic Azad University, karaj Branch, department of Wood and paper Science and Technology

3 Assistant Prof. Department of Wood and Paper Sciences and Technology, Islamic Azad University, Karaj Brach, karaj, Iran

4 Associate Prof., department fo Wood and Paper Sciences and techn ology, Islamic Azad University, Karaj Branch, Karaj, Iran

Abstract

The kinetics of old corrugated container (OCC) soda-oxygen delignification was investigated. Three delignification temperatures (145,165 and 175ºC) were applied. The pulping duration was adjusted at 150 minutes and the measurements were conducted at 10 minutes intervals. The pulping consistency, oxygen pressure and active alkali were constant at 10%, 6 bar and 18% NaOH respectively in all pulping trails. At the end of each pulping interval, the kappa number of the pulp was measured, and the kappa number reduction trend was plotted against pulping time. Then delignification rates and coefficients of delignification kinetics were calculated. It was revealed that the delignification proceeded in two different phases, called bulk and residual delignification. Based on the coordinates of both sections, the intersction point was determined as the transition point from bulk to residual delignification. Rate constant coefficient of both bulk and residual delignification are also calculatred. The results of kinetic study showed that when soda-oxygen delignification is applied on OCC, the initial phase of the reaction is very fast, but as the delignification proceeds, the rate of delignification is reduced indicating the residual delignification phase. The results showed that in the initial 45 minutes of the reaction, most of the lignin is removed.

Keywords

References

[1]. Azadfar, M.A., Rabi, B., and Jahan Latibari, A., (2011). The effect of alkali dosage on oxygen delignification of old corrugated container soda oxygen pulp. Iran Wood and Paper Research Journal, 26(2):232-242.
[2]. deRuvo, A., Farnstrand, P. A., Hagen, N., and Haglund, N. (1986). Upgrading pulp from corrugated containers by oxygen delignification. Tappi Journal, 6(7), 100-105.
[3]. Bisner, H.M., Champbell, R., and Mckean, W.T., (1993). Bleached kraft pulp from OCC. Progress. Paper Recycling 3(1): 10-27.
[4]. Namdarian, S., and Dehghani Firoozabadi, M. (2010). Kinetic investigation of kenaf bast soda pulping. Proceeding of 1st. National Conference on Advance Technologies in Wood and Paper Industries, 102-103, April, 2010.
[5]. Violette, S.M. (2003). Oxygen Delignification Kinetics And Selectivity Improvement; Ph.D thesis,  The Graduate School of The University Of Maine ,May, 2003. 186p.
[6]. Mirhossieni, S.A., Jahan Latibari, A., Karimi, A., and Mirshokraei, S.A. (2008). Investigation on the influence of chip thickness on kraft delignification kineics of three Iranian hardwoods. Chemistry and Chemical Engineering Journal, 27(3):107-114.
[7]. Ji, Y. (2007). Kinetics And Mechanism Of Oxygen Delignification ; Ph.D  thesis, The Graduate School The University Of Main, May (2007). 146p.
[8]. Vantran, A.L. (2001). Effect of pH on oxygen delignification of hardwood kraft pulp. Paperija Puu 83(5):405-410.
[9]. Heiningen A.V. and Violette S., (2003). Selectivity improvement during oxygen delignification by adsorption of a sugar-based polymer. Journal of Pulp and Paper Science, 29(2), 48-53
[10]. Dogan, I. (2004). Mass transfer and kinetics in oxygen delignification, Ph.D thesis, The Graduate School Of Natural And Applied Sciences Middle Technical University, November 2004. 205p.
[11] Tappi Standard Test Methods, (2009). Tappi Press, Atlanta, GA. USA.
[12]. Parsafar, G., and Najafi, B. (2009). Chemical kinetics; fundementals and Application. Esfahan Technical University Press, 336p.
 

Files

Share

How to cite

Statistics