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Journal articles
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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
Open Access
Comparison of cracking in recovery boiler composite floor and primary air port tubes, TAPPI JOURNAL, July 2002, Vol. 1(5) (378KB)

Comparison of cracking in recovery boiler composite floor and primary air port tubes, TAPPI JOURNAL, July 2002, Vol. 1(5) (378KB)

Journal articles
Open Access
Determination of Hexenuronic Acid and Residual Lignin in Pulps by UV Spectroscopy in Cadoxen Solutions, JOURNAL OF PULP AND PAPER SCIENCE: VOL. 28 NO. 6 JUNE 2002 [02JUNJP189.pdf]

Determination of hexenuronic acid and residual lignin in pulps by uv-spectroscopy in cadoxen solutions, Journal of Pulp and Paper Science, June 2002, Vol. 28(6) (188KB)

Open Access
METHODS TO MEASURE PULP YIELD IN INDUSTRIAL COOKING SYSTEMS, 2002 Kraft Pulp Yield Symposium

METHODS TO MEASURE PULP YIELD IN INDUSTRIAL COOKING SYSTEMS, 2002 Kraft Pulp Yield Symposium

Journal articles
Open Access
Pulping of aspen wood in acetic acid media: effect of operating conditions on yield and pulp properties, TAPPI JOURNAL, December 2000, Vol. 83(12)

Pulping of aspen wood in acetic acid media: effect of operating conditions on yield and pulp properties, TAPPI JOURNAL, December 2000, Vol. 83(12)

Journal articles
Open Access
Application of polyallylamine as a dry strength agent for paper, TAPPI JOURNAL, December 2000, Vol. 83(12)

Application of polyallylamine as a dry strength agent for paper, TAPPI JOURNAL, December 2000, Vol. 83(12)

Journal articles
Open Access
Wood and fiber properties of hybrid poplars from southern british columbia, TAPPI JOURNAL, July 2000, Vol. 83(7)

Wood and fiber properties of hybrid poplars from southern british columbia, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
Recovery modernization at stora ensoâ??s skutskÀr kraft mill, TAPPI JOURNAL, July 2000, Vol. 83(7)

Recovery modernization at stora enso’s skutskär kraft mill, TAPPI JOURNAL, July 2000, Vol. 83(7)

Magazine articles
Open Access
Managing technology - a critical contribution to competitiveness, TAPPI JOURNAL, June 2000, Vol. 83(6)

Managing technology - a critical contribution to competitiveness, TAPPI JOURNAL, June 2000, Vol. 83(6)

Journal articles
Open Access
Activation of alkaline peroxide delignification using a vanadium peroxo complex, TAPPI JOURNAL, June 2000, Vol. 83(6)

Activation of alkaline peroxide delignification using a vanadium peroxo complex, TAPPI JOURNAL, June 2000, Vol. 83(6)

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