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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
Open Access
Statistical determination of the effects of enzymes on bleached pulp yield, TAPPI JOURNAL, August 2005, Vol. 4(8) (80 KB)

Statistical determination of the effects of enzymes on bleached pulp yield, TAPPI JOURNAL, August 2005, Vol. 4(8) (80 KB)

Journal articles
Open Access
Environmentally benign psas featured at recycling symposium, TAPPI JOURNAL, February 2000, Vol. 83(2)

Environmentally benign psas featured at recycling symposium, TAPPI JOURNAL, February 2000, Vol. 83(2)

Journal articles
Open Access
Oxalic acid formation during ecf and tcf bleaching of kraft pulp, TAPPI JOURNAL, February 2000, Vol. 83(2)

Oxalic acid formation during ecf and tcf bleaching of kraft pulp, TAPPI JOURNAL, February 2000, Vol. 83(2)

Journal articles
Open Access
A laboratory study of occ flotation for removal of model stickie particles, TAPPI JOURNAL, July 2000, Vol. 83(7)

A laboratory study of occ flotation for removal of model stickie particles, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
Addition of sodium silicate and chelant to the fas stage to bleach recycled fibers, TAPPI JOURNAL, July 2000, Vol. 83(7)

Addition of sodium silicate and chelant to the fas stage to bleach recycled fibers, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
Advanced combustion and flow modeling: comprehensive model study improves recovery boiler operation, TAPPI JOURNAL, July 2000, Vol. 83(7)

Advanced combustion and flow modeling: comprehensive model study improves recovery boiler operation, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
Alkaline peroxide mechanical pulping of wheat straw Part 2: significance of peroxide stabilization to the brightening of wheat straw, TAPPI JOURNAL, July 2000, Vol. 83(7)

Alkaline peroxide mechanical pulping of wheat straw Part 2: significance of peroxide stabilization to the brightening of wheat straw, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
CMP and ctmp of a fast-growing tropical wood: acacia mangium, TAPPI JOURNAL, July 2000, Vol. 83(7)

CMP and ctmp of a fast-growing tropical wood: acacia mangium, TAPPI JOURNAL, July 2000, Vol. 83(7)

Magazine articles
Open Access
Using climate change policies for u.s. pulp and paper industry efficiency, TAPPI JOURNAL, July 2000, Vol. 83(7)

Using climate change policies for u.s. pulp and paper industry efficiency, TAPPI JOURNAL, July 2000, Vol. 83(7)

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