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Journal articles
Magazine articles
Open Access
New learnings and strategies for meeting future recovery boiler particulate emission limits with existing electrostatic precipitators, TAPPI Journal June 2021

ABSTRACT: It is foreseeable that recovery boiler particulate emission limits in the United States and Canada will continue to get more stringent with time. Because of this, continued improvement of emission control equipment, as well as a better understanding of how operating parameters affect performance, are necessary. Although electrostatic precipitators (ESPs) are often viewed as a mature technology, many improvements in ESP technology continue to be developed. In recent years, academic efforts have improved the understanding of recovery boiler operating conditions on ESP performance. Additionally, advancements in materials, power supplies, and design continue to improve the efficiency and reliability of ESPs.This paper discusses how recovery boiler and electrostatic precipitator (ESP) operating factors affect ESP perfor-mance based on process simulations and practical experience, and how these learnings can be implemented to improve future operation of existing ESPs.

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
Magazine articles
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
External fibrillation of wood pulp, TAPPI Journal June 2023

ABSTRACT: Pulp refining produces external fibrillation consisting of fibrils tethered to fiber surfaces, in addition to loose fibrils and fines. Both contribute to a larger bonding area that increases paper strength, but tethered fibrils have less likelihood of being washed out during papermaking. This study postulates the mechanism by which refining produces external fibrillation and the optimum conditions for doing so.The postulated mechanism is surface abrasion during sliding of fibers in refiner gaps. External fibrillation occurs when forces are great enough to partially dislodge fibrils from fiber surfaces, but not large enough to break the fibrils. The refining intensities to achieve these forces were determined by a mathematical model and experiments using a laboratory disc refiner. The optimum intensities in terms of specific edge load (SEL) for chemical pulps were about 0.1 J/m for hardwoods and 1.0 J/m for softwoods. An extension of this study suggested that abrasion may also account for most of the energy consumed in the mechanical pulping process.

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