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Journal articles
Open Access
Production of high yield bleached hardwood kraft pulp: Breaking the kraft pulp yield barrier,TAPPI Journal December 2024

Author: Peter W. Hart | TAPPI J. 10(9): 37(2011) - ABSTRACT: A modified kraft pulping process has been developed that successfully breaks the traditional hard-wood kraft pulp yield barrier. The process produces fully bleached, high brightness hardwood kraft pulp with a yield of greater than 53% on wood. Details of the development and processing steps, along with various recovery cycle impacts, are discussed.

Journal articles
Open Access
Hydrogen peroxide and caustic soda: Dancing with a dragon while bleaching,TAPPI Journal December 2024

Peter W. Hart, Carl Houtman, and Kilby Hirth | TAPPI J. 12(7): 59(2013) - ABSTRACT: When hydrogen peroxide is mixed with caustic soda, an auto-accelerating reaction can lead to generation of significant amounts of heat and oxygen. On the basis of experiments using typical pulp mill process concentration and temperatures, a relatively simple kinetic model has been developed. Evaluation of these model results reveals that hydrogen peroxide-caustic soda systems are extremely sensitive to hydrogen peroxide:caustic soda ratio, transition metal contamination, and temperature. Small changes in initial conditions can result in a closed system becoming explosive. Analysis of model results was used to develop guidelines for safer application of hydrogen peroxide in a mill setting.

Journal articles
Open Access
An activity-based cost calculation for a kraft pulp mill, TAPPI JOURNAL September 2012

An activity-based cost calculation for a kraft pulp mill, TAPPI JOURNAL September 2012

Journal articles
Open Access
Measuremets of sootblower jet strength in kraft recovery boilers â?¢ Part II: Results of the third and fourth field trials, TAPPI JOURNAL September 2012

Measuremets of sootblower jet strength in kraft recovery boilers • Part II: Results of the third and fourth field trials, TAPPI JOURNAL September 2012

Journal articles
Open Access
Composites from a forest biorefinery byproduct and agrofibers: Lignosulfonate-phenolic type matrices reinforced with sisal fibers, TAPPI JOURNAL September 2012

Composites from a forest biorefinery byproduct and agrofibers: Lignosulfonate-phenolic type matrices reinforced with sisal fibers, TAPPI JOURNAL September 2012

Journal articles
Open Access
Barrier properties created by dispersion coating, TAPPI JOURNAL April 2013

Barrier properties created by dispersion coating, TAPPI JOURNAL April 2013

Journal articles
Open Access
Ozone bleaching of South African Eucalyptus grandis kraft pulps containing high levels of hexenuronic acids, TAPPI JOURNAL August 2013

Ozone bleaching of South African Eucalyptus grandis kraft pulps containing high levels of hexenuronic acids, TAPPI JOURNAL August 2013

Journal articles
Open Access
Characterization of the pore structure and clay orientation in curtain coating layers using SEM and image analysis, TAPPI JOURNAL August 2013

Characterization of the pore structure and clay orientation in curtain coating layers using SEM and image analysis, TAPPI JOURNAL August 2013

Journal articles
Open Access
Acid methanolysis: An analytical tool for estimating the proportions of different pulp types in deinked pulp or recovered paper, TAPPI JOURNAL August 2013

Acid methanolysis: An analytical tool for estimating the proportions of different pulp types in deinked pulp or recovered paper, TAPPI JOURNAL August 2013

Journal articles
Open Access
Peroxomolybdate Catalysts in Pulp Hydrogen Peroxide Bleaching: Improvement Inhexeneuronic Acid Removal and Delignification, TAPPI JOURNAL March 2008

Peroxomolybdate Catalysts in Pulp Hydrogen Peroxide Bleaching: Improvement Inhexeneuronic Acid Removal and Delignification, TAPPI JOURNAL March 2008

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