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The solubility of calcium carbonate in green liquor handling systems, TAPPI Journal October 2019

ABSTRACT: The formation of hard calcite (CaCO3) scale in green liquor handling systems is a persistent problem in many kraft pulp mills. CaCO3 precipitates when its concentration in the green liquor exceeds its solubility. While the solubility of CaCO3 in water is well known, it is not so in the highly alkaline green liquor environment. A systematic study was conducted to determine the solubility of CaCO3 in green liquor as a function of temperature, total titratable alkali (TTA), causticity, and sulfidity. The results show that the solubility increases with increased temperature, increased TTA, decreased causticity, and decreased sulfidity. The new solubility data was incorporated into OLI (a thermodynamic simulation program for aqueous salt systems) to generate a series of CaCO3 solubility curves for various green liquor conditions. The results help explain how calcite scale forms in green liquor handling systems.

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Editorial: Multifaceted research at the University of Maine

Editorial: Multifaceted research at the University of Maine, TAPPI JOURNAL September 2017

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Open Access
Addition of corn stover arabinoxylan into hardwood during pu

Addition of corn stover arabinoxylan into hardwood during pulping for improved physical properties, TAPPI JOURNAL September 2017

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Open Access
Importance of specimen preparation for edgewise compressive strength (ECT) testing, TAPPI JOURNAL April 2018

Importance of specimen preparation for edgewise compressive strength (ECT) testing, TAPPI JOURNAL April 2018

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Open Access
Editorial: Douglas Coffin: Paper Physics Guru, TAPPI JOURNAL August 2018

Editorial: Douglas Coffin: Paper Physics Guru, TAPPI JOURNAL August 2018

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Open Access
Prediction of box failure from paper data for asymmetric corrugated board, TAPPI JOURNAL August 2018

Prediction of box failure from paper data for asymmetric corrugated board, TAPPI JOURNAL August 2018

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Open Access
Impact of fiber structure on edge-wicking of highly-sized paperboard, TAPPI JOURNAL August 2018

Impact of fiber structure on edge-wicking of highly-sized paperboard, TAPPI JOURNAL August 2018

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Open Access
The influence of strain rate and pulp properties on the stre

The influence of strain rate and pulp properties on the stress-strain curve and relaxation rate of wet paper, TAPPI JOURNAL August 2015

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Open Access
Editorial: Art Ragauskas: Eyes on the future, TAPPI JOURNAL

Editorial: Art Ragauskas: Eyes on the future, TAPPI JOURNAL October 2012

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Open Access
Editorial: Coating & Graphic Arts, Process Control papers ho

Editorial: Coating & Graphic Arts, Process Control papers honored at PaperCon, TAPPI JOURNAL June 2017

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