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The kinetic features of delignification in green liquor (GL) modified pulping versus conventional kraft pulping are the subject of this study. The use of a GL pretreatment can increase the rate of pulping by improving the kinetics of the onset of the bulk delignification stage. GL-modified pulping also assists the chemical reactions occurring in the pulping process. A correlation between chemical performance and lignin removal was established for GL-modified pulping. Pulping chemicals were mainly consumed during bulk delignification, and the efficiency of reactivity for the hydrosulfide and hydroxide anions in delignification were 2 and 1.6 times higher, respectively, than conventional kraft delignification.
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A Quantitative Comparison of the Kenetic Features of Green Liquor-Modified Versus Conventional Kraft