Search
Use the search bar or filters below to find any TAPPI product or publication.
Filters
Content Type
Publications
Level of Knowledge
Committees
Event Type
Collections
Journal articles
Magazine articles
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.
Conference papers
Alias Impact on Control Profiles, 19PaperCon
Alias Impact on Control Profiles, 19PaperCon
Conference papers
Continuous Cross Machine Formation by Wavelet Transform Analysis, 19PaperCon
Continuous Cross Machine Formation by Wavelet Transform Analysis, 19PaperCon
Conference papers
FULL WEB DIRT MEASUREMENT FOR PULP AND PAPER, 19PaperCon
FULL WEB DIRT MEASUREMENT FOR PULP AND PAPER, 19PaperCon
Conference papers
Effect of Fiber Structure on Edge-Wicking in a Highly Sized Paper, 19PaperCon
Effect of Fiber Structure on Edge-Wicking in a Highly Sized Paper, 19PaperCon
Conference papers
Improving Paper Wet-strength by Means Hot-Pressing and Increased Lignin Content in Pulp Fibers, 19PaperCon
Improving Paper Wet-strength by Means Hot-Pressing and Increased Lignin Content in Pulp Fibers, 19PaperCon
Conference papers
Textile-Like Materials with Foam Forming on a Paper Machine, 19PaperCon
Textile-Like Materials with Foam Forming on a Paper Machine, 19PaperCon
Conference papers
Pilot Scale Production of Interactive Zinc Oxide Paper and its Multiple Applicability, 19PaperCon
Pilot Scale Production of Interactive Zinc Oxide Paper and its Multiple Applicability, 19PaperCon
Conference papers
Electroactive Papers, Films, Filaments, Aerogels, and Hydrogels to Realize the Future of Bio-based Electronics, 19PaperCon
Electroactive Papers, Films, Filaments, Aerogels, and Hydrogels to Realize the Future of Bio-based Electronics, 19PaperCon
Conference papers
SURFACE SIZING WITH HIGH NIP PRESSURE, 19PaperCon
SURFACE SIZING WITH HIGH NIP PRESSURE, 19PaperCon