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Journal articles
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Open Access
Synthesis and characterization of novel foams by pyrolysis of lignin, TAPPI Journal January 2019

Synthesis and characterization of novel foams by pyrolysis of lignin, TAPPI Journal January 2019

Journal articles
Magazine articles
Open Access
Graft copolymerization of acrylic acid of kraft lignin to enhance aniline adsoprtion from aqueous solution, TAPPI JOURNAL January 2019

Graft copolymerization of acrylic acid of kraft lignin to enhance aniline adsoprtion from aqueous solution, TAPPI JOURNAL January 2019

Journal articles
Magazine articles
SetPoint: Welcome to 2019, Paper360º January/February 2019

SetPoint: Welcome to 2019, Paper360º January/February 2019

Journal articles
Magazine articles
Domtar’s Safety Journey, Paper360º January/February 2019

Domtar’s Safety Journey, Paper360º January/February 2019

Journal articles
Magazine articles
The Trade War Threat Looms, Paper360º January/February 2019

The Trade War Threat Looms, Paper360º January/February 2019

Journal articles
Magazine articles
Automatic Dewiring Improves Safety at Sonoco Board Mill, Paper360º January/February 2019

Automatic Dewiring Improves Safety at Sonoco Board Mill, Paper360º January/February 2019

Journal articles
Magazine articles
When Operations Runs Maintenance, Paper360º January/February 2019

When Operations Runs Maintenance, Paper360º January/February 2019

Journal articles
Magazine articles
Issues That Keep Tissue Execs Up at Night (or Should), Paper360º January/February 2019

Issues That Keep Tissue Execs Up at Night (or Should), Paper360º January/February 2019

Journal articles
Magazine articles
Open Access
Mill experience of calcium carbonate scale formation in green liquor pipelines, TAPPI Journal August 2020

ABSTRACT: Experience of hard calcite (CaCO3) scale formation in green liquor pipelines at four kraft pulp mills was systematically investigated to determine if there is any correlation between the severity of the scaling problem at each mill and the design and operating conditions of its causticizing plant. The results show that the high degree of supersaturation of calcium ions (Ca2+) in the liquor is the main contributing factor. Mills that operate at a lower green liquor total titratable alkali (TTA), higher causticity, and a larger liquor temperature drop are more likely to produce a green liquor that is supersaturated with Ca2+, and thus experience more severe scaling problems. In order to minimize CaCO3 scaling, the green liquor handling equipment should be operated as steady as possible to avoid conditions that allow Ca2+ to be supersaturated. The strategies include minimizing variations in liquor TTA, insulating the green liquor pipelines to reduce temperature gradients, and adding lime mud to weak wash to provide seeds for precipitation to occur on mud particles instead of on metal substrate.

Journal articles
Magazine articles
Standards
Open Access
On-machine visible dirt measurement on moving sheets and the relationships to standard laboratory methods, TAPPI Journal August 2020

ABSTRACT: There has been a proliferation of new sensors to measure on-machine dirt specks that employ different technologies and methodologies to perform measurements. The differences in the on-machine technologies are discussed in terms of the TAPPI and ISO standard laboratory test methods with respect to dirt detection using light reflected from, or light transmitted through, the sheet. Also discussed are the requirements for measuring sta-tistically representative areas of the sheet; the difference between the dirt physical size and Equivalent Black Area (EBA) size; and the implication of these issues when specifying cleanliness acceptance criteria.This technical brief describes on-machine visible dirt measurement’s relationship to standard laboratory testing.

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