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Journal articles
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Open Access
Repulping of wet strength paper towel with potassium monopersulfate, TAPPI Journal September 2020

ABSTRACT: Potassium monopersulfate (KMPS) was used in repulping of polyamide-epichlorohydrin (PAE)-containing paper towel. The effectiveness of the repulping aid was compared with that of sodium hypochlorite. Addition of a 2.4% KMPS repulping aid achieved complete repulping of the paper towel, resulting in 88% screen yield and about 5% rejects. To reach a similar pulping result, two times the oxidative equivalent amount of sodium hypochlorite had to be used. Compared to the pulp fibers obtained from sodium hypochlorite repulping, those obtained from KMPS repulping had higher physical strength, longer fiber length, and lower fines content. This study demonstrated that KMPS was superior to sodium hypochlorite in repulping of PAE-containing paper towel in terms of effectiveness and pulp quality.

Journal articles
Magazine articles
Open Access
Evaluating the effect of recovery boiler operation on green liquor dregs concentration using multivariate analysis, TAPPI Journal June 2023

ABSTRACT: Poor settling and filterability of green liquor dregs has been a persistent problem in many kraft pulp mills. While the concentration and settling/filtering behaviors of dregs are expected to be related to how black liquor is burned in recovery boilers, the effect of boiler operation is not well understood. A systematic study was conducted to examine how recovery boiler operation may affect the dregs concentration in the raw green liquor (RGL) at three kraft pulp mills using SIMCA, a multivariate data analysis (MVDA) program. Daily average boiler operating data from three kraft mills were analyzed over a 3-year period. Results of both principal component analysis (PCA) and partial least squares regression (PLS) suggest that the main boiler operations contributing to high dregs concentrations in RGL are low liquor firing load, low bed temperature, poor char burning, and unstable char bed.

Journal articles
Open Access
Development and Application of a Real-Time Recovery Boiler E

Development and Application of a Real-Time Recovery Boiler Expert System, 1991 Engineering Conference Proceedings

Journal articles
Open Access
Recovery of Sulfur from Spent Semichemical Pulping Liquors,

Recovery of Sulfur from Spent Semichemical Pulping Liquors, 1991 Engineering Conference Proceedings

Journal articles
Open Access
Model to Predict the Precipitation of Burkeite in the Multip

Model to Predict the Precipitation of Burkeite in the Multiple Effect Evaporator and Techniques for Controlling Scaling, 1995 Engineering Conference Proceedings

Journal articles
Open Access
Liquor-To-Liquor Differences in Combustion and Gasification

Liquor-To-Liquor Differences in Combustion and Gasification Processes: Nitrogen Oxide Formation Tendency, 1995 Engineering Conference Proceedings

Journal articles
Open Access
Improving Softwood Mechanical Pulp Properties with Ophiostom

Improving Softwood Mechanical Pulp Properties with Ophiostoma Piliferum, 1995 Pulping Conference Proceedings

Journal articles
Open Access
Xylanase Treatment for the Bleaching of Softwood Kraft Pulps

Xylanase Treatment for the Bleaching of Softwood Kraft Pulps: The Effect of Chlorine Dioxide Substitution, 1992 Pulping Conference Proceedings

Journal articles
Open Access
The Impact of the Summer Effect on Ink Detachment and Remova

The Impact of the Summer Effect on Ink Detachment and Removal

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