Displacement washing of softwood pulp cooked to various levels of residual lignin content
Source abstract
Abstract
This study investigates the influence of the degree of delignification of kraft spruce pulp cooked at seven different kappa numbers, ranging from 18.1 to 50.1, on the efficiency of displacement washing under laboratory conditions. Although the pulp bed is a polydispersive and heterogeneous system, the correlation dependence of the wash yield and bed efficiency on the Péclet number and the kappa number of the pulp showed that washing efficiency increased not only with an increasing Péclet number, but also with an increasing kappa number. The linear dependence between the mean residence time of the solute lignin in the bed and the space time, which reflects the residence time of the wash liquid in the pulp bed, was found for all levels of the kappa number. Washing also reduced the kappa number and the residual lignin content in the pulp fibers.
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Research context
OpenAlex topics: Lignin and Wood Chemistry · Wood Treatment and Properties · Advanced Cellulose Research Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
Show source-provided references
1. Wilson, J., TAPPI Pulping Conf., TAPPI Press, Atlanta, 1993, p. 155.
2. Grähs, L.E., Sven. Papperstidn. 79(3): 84(1976).10.1177/0040571X7607900204 ↗
3. Grähs, L.E., Sven. Papperstidn. 79(4): 3(1976).
4. Lee, P.F., Tappi 62(9): 75(1979).
5. Poirier, N.A., Crotogino, R.H., and Douglas, W.J.M., Can. J. Chem. Eng. 66(6): 936(1988). https://doi.org/10.1002/cjce.5450660607.10.1002/cjce.5450660607 ↗
6. Trinh, D.T., Poirier, N.A., Crotogino, R.H., et al., J. Pulp Pap. Sci. 15(1): 28(1989).
7. Potu˚cˇek, F., Collect. Czech. Chem. Commun. 62(4): 626(1997). https://doi.org/10.1135/cccc19970626.10.1135/cccc19970626 ↗
8. Potu˚cˇek, F. and Marhanová, M., Chem. Pap. 54(4): 221(2000).
9. Potu˚cˇek, F. and Miklík, J., Chem. Pap. 64(2): 147(2010). https://doi.org/10.2478/s11696-009-0078-7.10.2478/s11696-009-0078-7 ↗
10. Potu˚cˇek, F. and Hájková, K., Chem. Pap. 69(8): 1067(2015). https://doi.org/10.1515/chempap-2015-0106.10.1515/chempap-2015-0106 ↗
11. Lee, P.F., Tappi J. 67(11): 100(1984).
12. Hakamäki, H. and Kovasin, K., Pulp Pap. Can. 86(9): T243(1985).
13. Crotogino, R.H., Poirier, N.A., and Trinh, D.T., Tappi J. 70(6): 95(1987).
14. Smith, R.J. and Duffy, G.G., Appita Annu. Gen. Conf. Proc., 53rd, 1999,p. 275.
15. Potu˚cˇek, F., Rahman, M., and Miklík, J., Cellul. Chem. Technol. 54(9–10): 943(2020). https://doi.org/10.35812/CelluloseChemTechnol.2020.54.91.10.35812/CelluloseChemTechnol.2020.54.91 ↗
16. Potu˚cˇek, F. and Miklík, J., Acta Fac. Xylol. Zvolen 53(A): 49(2011).
17. Ingmanson, W.L., Chem. Eng. Prog. 49(11): 577(1953).
18. Miklík, J., “Displacement washing of hardwood pulp,” Ph.D. thesis, University of Pardubice, Pardubice, Czech Republic, 2014.
19. Potu˚cˇek, F. and Rahman, M.M., Cellul. Chem. Technol. 52(5–6):393(2018).
20. Rainey, T.J., Doherty, W.O., Martinez, D.M., et al., Appita J. 62(4): 296(2009).
21. Lindsay, J.D., Tappi J. 77(6): 225(1994).
22. Poirier, N.A., Crotogino R.H., Trinh, D.T., et al., Pulp Washing Symp., Finnish Pulp and Paper Research Institute, Espoo, Finland, 1987.
23. Levenspiel, O. and Smith, W.K., Chem. Eng. Sci. 6(4–5): 227(1957). https://doi.org/10.1016/0009-2509(57)85021-0.10.1016/0009-2509(57)85021-0 ↗
24. Levenspiel, O., Chemical Reaction Engineering, John Wiley & Sons, New York, 1962.
25. Potu˚cˇek, F., Pap. Celul. 56(1): 8(2001).10.17016/IFDP.2001.711 ↗
26. Arora, S., Kaur, I., and Potu˚cˇek, F., Braz. J. Chem. Eng. 32(2):563(2015). https://doi.org/10.1590/0104-6632.20150322s00003160.10.1590/0104-6632.20150322s00003160 ↗
27. Van Der Laan, E.Th., Chem. Eng. Sci. 6: 187(1957).
28. Brenner, H., Chem. Eng. Sci. 17(4): 229(1962).https://doi.org/10.1016/0009-2509(62)85002-7.10.1016/0009-2509(62)85002-7 ↗
29. Cullinan, H.T., Appita J. 44(2): 91(1991). https://doi.org/10.1063/1.2810051.10.1063/1.2810371 ↗
30. Hatfield, R. and Fukushima, R.S., Crop Sci. 45(3): 832(2005). https://doi.org/10.2135/cropsci2004.0238.10.2135/cropsci2004.0238 ↗
31. Potu˚cˇek, F., Cellul. Chem. Technol. 37(1-2): 141(2003).
32. Ala-Kaila, K., Li, J., Sevastyanova, O., et al., TAPPI J. 2(10):23(2003).