Detailed modeling of the kraft pulping chemistry: carbohydrate reactions

Olesya Fearon

    Research output: Contribution to journalArticleScientificpeer-review

    15 Citations (Scopus)

    Abstract

    The article introduces a detailed model for carbohydrate chemistry in kraft pulping. This article is continuation to the modeling work carried out for hot water extraction and chemical pulp bleaching. The model includes galactoglucomannan, xylan, and cellulose acid–base equilibria, in addition to peeling, stopping, and alkaline hydrolysis reactions of the same carbohydrates, as well as hexenuronic acid formation and degradation reactions. The Arrhenius parameters were applied from the literature or regressed against experimental data in the present study. The model is very successful in predicting the experimental data of carbohydrate reactions during kraft pulping. Many features of the pulping-related model can be applied to specific fractionation chemistry considerations. The detailed knowledge on carbohydrates composition at any stage of pulping gives possibility for further development of biorefinery cases based on kraft pulping, such as biofuel and chemicals production.

    Original languageEnglish
    Article numbere16252
    JournalAIChE Journal
    Volume66
    Issue number8
    DOIs
    Publication statusPublished - 1 Aug 2020
    MoE publication typeA1 Journal article-refereed

    Keywords

    • carbohydrates
    • kraft pulping
    • modeling
    • reaction kinetics
    • reaction mechanism

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