Generalized steady-state model for chlorine dioxide brightening of hardwood kraft pulps
Source abstract
Abstract
A generalized, steady-state model for the first chlorine dioxide brightening (D1) stage is proposed for North American hardwood kraft pulps. The model predicts the post-D1 brightness obtained for a given chlorine dioxide (ClO2) charge based on three equation parameters. Data from laboratory D1 studies were examined with the model to determine the relationships of the parameters to extracted pulp properties. The asymptotic D1 brightness limit at extremely high bleach charges was ~93% ISO for most hardwood pulps. This parameter can be calculated from the limiting light absorption coefficient of D1 kinetic studies (≈ 0.10 m2/kg) and the unbeaten light scattering coefficient of the pulp. A second parameter was linearly correlated to the extracted kappa number of the hardwood pulp. This relationship seems to be affected by the chosen kraft pulping process (e.g., liquor or dissolved solids profiling). The final parameter is the extracted pulp brightness. The hardwood D1 model forecasted the brightness values of laboratory pulps that differ from measured values of ±0.5 to ±0.6 points. Daily averages of bleach plant data for a southeastern U.S. hardwood fiber line were examined with the model. Predictions were generally 0.5 points higher than the measured mill brightness values. This observation implied that the D0(EOP) pulp contained a small amount of extraction washer carryover (~0.4 kappa units on pulp) that was consuming ~1.2 kg ClO2/ton pulp, which was not accounted for in the hardwood D1 model.
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Research context
OpenAlex topics: Lignin and Wood Chemistry · Petroleum Processing and Analysis · Biofuel production and bioconversion
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References (46)
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1. Rudie, A.W. and Hart, P.W., in The Bleaching of Pulp (P.W. Hart and A.W. Rudie, Eds.) 5th edn., TAPPI Press, Atlanta, GA, USA, 2012, Chap. 1.
2. Annergren, G.E., Boman, M., and Sandstrom, P., Int. Pulp Bleaching Conf., SPCI, Stockholm, Sweden, 1998, pp. 99-110.
3. McDonough, T.J., Rawat, N., and Krishnagopalan, G.A., Appita J. 57(5): 381(2004).10.2307/4151439 ↗
4. McDonough, T.J., Uno, S., Rudie, A.W., et al., TAPPI J. 7(1): 4(2008).10.32964/TJ7.1.4 ↗
5. McDonough, T.J., Uno, S., Rudie, A.W., et al., TAPPI J. 8(8): 10(2009).10.32964/TJ8.8.10 ↗
6. Hart, P.W. and Connell, D., TAPPI J. 5(4): 23(2006).10.1111/j.1467-8322.2006.00463.x ↗
7. Brogdon, B.N., TAPPI J. 9(8): 27(2010).10.32964/TJ9.8.27 ↗
8. Brogdon, B.N., TAPPI J. 9(9): 47(2010).10.32964/TJ9.9.47 ↗
9. Brogdon, B.N., TAPPI J. 12(10): 33(2013).10.32964/TJ12.10.33 ↗
10. Brogdon, B.N., in The Bleaching of Pulp (P.W. Hart and A.W. Rudie, Eds.) 5th edn., TAPPI Press, Atlanta, 2012, Chap. 12.
11. Brogdon, B.N., TAPPI J. 11(3): 31(2012).10.32964/TJ11.3.31 ↗
12. Brogdon, B.N., TAPPI J. 13(3): 29(2014).10.32964/TJ13.4.29 ↗
13. Brogdon, B.N., TAPPI J. 13(3): 17(2014).10.32964/TJ12.2.17 ↗
14. Brogdon, B.N., TAPPI J. 14(2): 93(2015).10.32964/TJ14.2.93 ↗
15. Brogdon, B.N., TAPPI J. 15(3): 178(2016).10.32964/TJ15.3.178 ↗
16. Brogdon, B.N., TAPPI J. 12(2): 17(2013).10.32964/TJ12.2.17 ↗
17. Rydholm, S.A., in Pulping Processes (S.A. Rydholm, Ed.), Wiley & Sons, New York, 1965, pp. 42-68.
18. Reeves, R.H., in Pulp and Paper Manufacture: Vol. 7 Paper Machine Operations (B.A. Thorp, Ed.), The Joint Textbook Committee of the Paper Industry, Atlanta, 1991, pp. 26-53.
19. Süss, H.U., Schmidt, K., Davies D., et al., Int. Papierwirtsch. 11(5): 40(2006).10.1055/s-0036-1573864 ↗
20. Ragnar, M., Nord. Pulp Pap. Res. J. 18(2): 162(2003).10.3183/NPPRJ-2003-18-02-p162-167 ↗
21. Basta, J., Andersson, L., Blom, C., et al., TAPPI Pulping Conf., TAPPI Press, Atlanta, 1992, pp. 547-553.
22. Parthasarathy, V., Rudie, G., Detty, A., et al., TAPPI Pulping Conf., TAPPI Press, Atlanta, 1993, pp. 933-949.
23. Parthasarathy, V., Detty, A., and Steffy, J., “Elemental chlorine free and low chlorine bleaching of Chillicothe hardwood – extending delignification and bleaching of hardwood pulps,” Internal Report No. 16,136, Mead Central Research, Chillicothe, OH, USA, October 1993.
24. Rawat, N. and McDonough, T.J., TAPPI Pulping Conf., TAPPI Press, Atlanta, 1998, pp. 883-891.
25. Rawat, N. and McDonough, T.J., Unpublished data, Institute of Paper Science and Technology, Atlanta, 24 March 1998.
26. Reeve, D.W. and Weishar, K.M., Tappi J. 82(10): 136(1999).
27. Germgård, U. and Lundquvist, M., Appita J. 43(1): 63(1990).10.1063/1.2810401 ↗
28. Germgård, U., Klorat, A., and Karlsson, R.-M., Nord. Pulp Pap. Res. J. 3(4): 166(1988).10.3183/NPPRJ-1988-03-04-p166-171 ↗
29. Barroca, M.J.M.C. and Castro, J.A.A.M., Ind. Eng. Chem. Res. 42(18): 4156(2003).10.1021/ie030126f ↗
30. McDonough, T.J., Krishnagopalan, G.A., Rawat, N., et al., Int. Symp. Wood Pulping Chem., 10th, Japan TAPPI, Tokyo, Japan, 1999, pp. 296-301.
31. McDonough, T.J., Krishnagopalan, G.A, Rawat, N., et al., “Bleachability in oxygen-based ECF sequence of softwood and hardwood kraft pulps made with altered liquor concentration profiles 1: effect of oxygen delignification on the bleachability of conventional pulps,” Int. Pulp Bleaching Conf., PAPTAC, Montréal, 2000.
32. Hart, P.W. and Connell, D., TAPPI J. 7(7): 3(2008).10.32964/TJ7.7.3 ↗
33. Connell, D. and Smith, S., “An evaluation of the effects of Mg(OH)2 addition to the extraction stage,” TAPPI Eng., Pulping Environ. Conf., TAPPI Press, Atlanta, 2009.
34. Brogdon, B.N. and Bell, J.M., “Optimization of chlorine dioxide bleaching sequences for kraft pulps through improved oxidative alkaline extraction stage performance,” TAPPI Fall Tech. Conf., TAPPI Press, Atlanta, 2004, Session 18-3.
35. Brogdon, B.N., Unpublished data, June 2003.
36. Teder, A. and Tormund, D., Trans. Tech. Sect. (Can. Pulp Pap. Assoc.) 3(2): TR41(1977).
37. Middleton, S.R. and Scallan, A.M., Nord. Pulp Pap. Res. J. 7(1): 22(1992).10.3183/NPPRJ-1992-07-01-p022-024 ↗
38. Nanko, H., Button, A., and Hillman, D., in The World of Market Pulp (C.E. Swann, Ed.), 3rd edn., WOMP LLC, Appleton, WI, USA, 2005, pp. 137-262.
39. Kibblewhite, R.P., Bawden, A.D., and Hughes, M.C., Appita J. 44(5): 325(1991).
40. Byrd, V.L. and Fahey, D.J., Pap. Trade J. 153(47): 54(1969).
41. Barker, R.G., Tappi 57(8): 107(1974).
42. Wilder, H.D., Unpublished data, Institute of Paper Chemistry, Appleton, 18 March 1964.
43. Rapson, W.H., in The Bleaching of Pulp (W.H. Rapson, Ed.), TAPPI Press, Atlanta, 1963, Monograph No. 27, pp. 130-179.
44. Pryke, D.W. and Nylen, K., Pulp Pap. Can. 109(1): 43(2008).
45. Steelreath, E., Earl, P.F., and Vanderheide, J., “Bleach plant optimization at the Resolute Forest Products Coosa Pines mill,” TAPPI PEERS Conf., TAPPI Press, Atlanta, 2014.
46. Brogdon, B.N., “A fundamental review and critical analysis of hexenuronic acids and their impact in elemental chlorine-free bleaching,” TAPPI Eng., Pulping Environ. Conf., TAPPI Press, Atlanta, 2009.