Kinetics of Chlorine Dioxide Delignification of Eucalypt Kraft Pulps, 1998 Pulping Conference Proceedings

A Nuclei Growth model, which had been developed to describe the kinetics of oxygen delignification, was used to characterize the kinetics of chlorine dioxide delignification of kraft pulps. The model described the delignification rate as a function of the reactive site density in residual lignin and the expansion rate of the reacted or transformed lignin initiated at the reactive sites in the fibre wall. The expansion of the transformed lignin was assumed to follow a power law with respect to the reaction time. The model included the effect of mutual interference between the transformed zones on the reactivity of lignin. The model parameters were determined and its validity was tested using experimental results from previous publications and from bleaching tests with two eucalypt kraft pulps. The model was robust and can characterize the kinetics of chlorine dioxide delignification with a high degree of accuracy.

Author: Chandranupap, P., Nguyen, K. L.
Kinetics of Chlorine Dioxide Delignification of Eucalypt Kra
Kinetics of Chlorine Dioxide Delignification of Eucalypt Kraft Pulps, 1998 Pulping Conference Proceedings
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