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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.

Journal articles
Open Access
Application of lipase to reduce ONP flotation rejects: Part 2. Reduction of flotation rejects, TAPPI JOURNAL, August 2008

Application of lipase to reduce ONP flotation rejects: Part 2. Reduction of flotation rejects, TAPPI JOURNAL, August 2008

Journal articles
Open Access
Influence of pulp refining on tissue paper properties, TAPPI JOURNAL August 2008

Influence of pulp refining on tissue paper properties, TAPPI JOURNAL August 2008

Journal articles
Magazine articles
Open Access
Does the kappa number method accurately reflect lignin content in nonwood pulps?, TAPPI Journal November 2018

Does the kappa number method accurately reflect lignin content in nonwood pulps?, TAPPI Journal November 2018

Journal articles
Magazine articles
Open Access
Understanding the pulping and bleaching performances of eucalyptus woods affected by physiological disturbance, TAPPI Journal November 2018

Understanding the pulping and bleaching performances of eucalyptus woods affected by physiological disturbance, TAPPI Journal November 2018

Journal articles
Magazine articles
Open Access
A review of green liquor scale formation, TAPPI Journal October 2018

A review of green liquor scale formation, TAPPI Journal October 2018

Journal articles
Magazine articles
Open Access
Low-temperature precausticizing — a hopeful approach for green liquor desilication, TAPPI JOURNAL February 2017

Low-temperature precausticizing — a hopeful approach for green liquor desilication, TAPPI JOURNAL February 2017

Journal articles
Magazine articles
Open Access
Removal of silicon from green liquor with low-temperature precausticizing, TAPPI JOURNAL January 2017

Removal of silicon from green liquor with low-temperature precausticizing, TAPPI JOURNAL January 2017

Journal articles
Magazine articles
Open Access
Kinetics of sulfur dioxide-alcohol-water (SAW) pulping of su

Kinetics of sulfur dioxide-alcohol-water (SAW) pulping of sugarcane straw (SCS), TAPPI JOURNAL June 2017

Journal articles
Magazine articles
Open Access
Pulping and bleaching of Malaysian oil palm empty fruit bunc

Pulping and bleaching of Malaysian oil palm empty fruit bunches, TAPPI JOURNAL June 2017

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