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Journal articles
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Open Access
Critical parameters for tall oil separation I: The importance of ration of fatty acids to rosin acids, TAPPI Journal September 2019

ABSTRACT: Tall oil is a valuable byproduct in chemical pulping of wood, and its fractions have a large spectrum of applications as chemical precursors, detergents, and fuel. High recovery of tall oil is important for the economic and environmental profile of chemical pulp mills. The purpose of this study was to investigate critical parameters of tall oil separation from black liquor. To investigate this in a controlled way, we developed a model test system using a “synthetic” black liquor (active cooking chemicals OH- and HS- ions), a complete process for soap skimming, and determination of recovered tall oil based on solvent extraction and colorimetric analysis, with good reproducibility. We used the developed system to study the effect of the ratio of fatty acids to rosin acids on tall oil separation. When high amounts of rosin acids were present, tall oil recovery was low, while high content of fatty acids above 60% significantly promoted tall oil separation. Therefore, manipulating the content of fatty acids in black liquor before the soap skimming step can significantly affect the tall oil solubility, and hence its separation. The findings open up chemical ways to improve the tall oil yield.

Journal articles
Magazine articles
He’s Got the Pulp: Schalka Sets Record as LA CEO of the Year, Paper360º September/October 2019

He’s Got the Pulp: Schalka Sets Record as LA CEO of the Year, Paper360º September/October 2019

Journal articles
Magazine articles
IDEAS Digital Twin Technology for Evaporation Plants, Paper360º September/October 2019

IDEAS Digital Twin Technology for Evaporation Plants, Paper360º September/October 2019

Journal articles
Magazine articles
TAPPI Journal Summaries, Paper360º September/October 2019

TAPPI Journal Summaries, Paper360º September/October 2019

Journal articles
Magazine articles
Open Access
Modeling of the energy of a smelt-water explosion in the recovery boiler dissolving tank, TAPPI Journal August 2020

ABSTRACT: The explosion energy generated as molten smelt droplets interact with water was evaluated as a function of smelt distribution, water temperature, and smelt temperature using a thermodynamic model. The results show that increasing smelt-to-water volume ratio and water temperature significantly increases the explosion energy, converting a larger proportion of the thermal energy of smelt into mechanical work. To reduce the chance of violent smelt-water explosions, it is important to: i) optimize the shatter jet design and operation to uniformly distribute the smelt over a large area in the dissolving tank; ii) avoid high green liquor temperature and ensure adequate liquor mixing; and iii) avoid upsets that may cause heavy smelt runoff or jellyroll smelt.

Conference papers
Using Wood Powder as Fuel in Lime Kilns, 2018 PEERS

Using Wood Powder as Fuel in Lime Kilns, 2018 PEERS

Conference papers
Kiln Axis Survey Alignment Methodology to Increase Accuracy, 2018 PEERS

Kiln Axis Survey Alignment Methodology to Increase Accuracy, 2018 PEERS

Conference papers
Reduction of Particulate and NOx Emissions from Kraft Recovery Boilers Using Catalytic Filtration Technology, 2018 PEERS

Reduction of Particulate and NOx Emissions from Kraft Recovery Boilers Using Catalytic Filtration Technology, 2018 PEERS

Conference papers
Factors Impacting CO and NOx Emissions on Biomass-Fired Stoker Boilers, 2018 PEERS

Factors Impacting CO and NOx Emissions on Biomass-Fired Stoker Boilers, 2018 PEERS

Conference papers
Managing Risk to Meet Project Objectives Mill Perspectives, 2018 PEERS

Managing Risk to Meet Project Objectives Mill Perspectives, 2018 PEERS

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