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A New Prediction Model for Pulp Kappa Number in Eucalyptus Kraft Pulping

Cui Zhang

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Abstract

A prediction model for pulp Kappa number during eucalyptus kraft pulping was presented. Based on the relationships between the pulp Kappa number and pulping parameters such as H-factor,initial concentration of alkali and sulfide,and residual alkali in the cooking liquor,an empirical model,i.e.,K=A+B/{H[(CAA -0.5S·CAA)-(0.5S·CAA+CREA)]2} with A = 9.50 and B = 9.28×105,was proposed. The result showed that there is a good agreement (R2 = 0.9152) between the measured and predicted pulp Kappa number,indicating that the model is justifiable to be applied to predict pulp Kappa number during eucalyptus kraft pulping.

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What this paper is about

A prediction model for pulp Kappa number during eucalyptus kraft pulping was presented. Based on the relationships between the pulp Kappa number and pulping parameters such as H-factor,initial concentration of alkali and sulfide,and residual alkali in the cooking liquor,an empirical model,i.e.,K=A+B/{H[(CAA -0.5S·CAA)-(0.5S·CAA+CREA)]2} with A = 9.50 and B = 9.28×105,was proposed. The result showed that there is a good agreement (R2 = 0.9152) between the measured and predicted pulp Kappa number,indicating that the model is justifiable to be applied to predict pulp Kappa number during eucalyptus kraft pulping.

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Available abstract

A prediction model for pulp Kappa number during eucalyptus kraft pulping was presented. Based on the relationships between the pulp Kappa number and pulping parameters such as H-factor,initial concentration of alkali and sulfide,and residual alkali in the cooking liquor,an empirical model,i.e.,K=A+B/{H[(CAA -0.5S·CAA)-(0.5S·CAA+CREA)]2} with A = 9.50 and B = 9.28×105,was proposed. The result showed that there is a good agreement (R2 = 0.9152) between the measured and predicted pulp Kappa number,indicating that the model is justifiable to be applied to predict pulp Kappa number during eucalyptus kraft pulping.

Key concepts: Kappa number, Kraft process, Pulp (tooth), Eucalyptus, Pulp and paper industry, Soda pulping, Kraft paper, Kappa

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