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Journal articles
Open Access
Revised steady-state model for chlorine dioxide brightening

Revised steady-state model for chlorine dioxide brightening that considers extraction washer carryover effects, TAPPI JOURNAL March 2016

Journal articles
Magazine articles
Open Access
Comprehensive fault detection and isolation method applied t

Comprehensive fault detection and isolation method applied to a recovery boiler, TAPPI JOURNAL May 2016

Journal articles
Magazine articles
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
Open Access
Measurement of kappa number variability on the fiber level, Solutions! & TAPPI JOURNAL, December 2002, Vol. 1(10) (147KB)

Measurement of kappa number variability on the fiber level, Solutions! & TAPPI JOURNAL, December 2002, Vol. 1(10) (147KB)

Journal articles
Open Access
Using near-infrared multivariate image regression to predict pulp properties, Solutions! & TAPPI JOURNAL, May 2004, Vol. 3(5) (271KB)

Using near-infrared multivariate image regression to predict pulp properties, Solutions! & TAPPI JOURNAL, May 2004, Vol. 3(5) (271KB)

Journal articles
Open Access
Concentric mixing of hardwood pulp and water, TAPPI JOURNAL, Online Exclusive, May 2004, Vol. 3(5) (475KB)

Concentric mixing of hardwood pulp and water, TAPPI JOURNAL, Online Exclusive, May 2004, Vol. 3(5) (475KB)

Journal articles
Open Access
Sulfuric acid emissions from combination boilers, Solutions! & TAPPI JOURNAL, May 2004, Vol. 3(5) (128KB)

Sulfuric acid emissions from combination boilers, Solutions! & TAPPI JOURNAL, May 2004, Vol. 3(5) (128KB)

Journal articles
Open Access
Release of nitrogen species from the recovery processes of three kraft pulp mills, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (326KB)

Release of nitrogen species from the recovery processes of three kraft pulp mills, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (326KB)

Journal articles
Open Access
Response of bagasse and wheat straw recycled pulps to refining, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (349KB)

Response of bagasse and wheat straw recycled pulps to refining, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (349KB)

Journal articles
Open Access
Accelerated light exposure of wood-containing pulps. part I: effects of wavelength and intensity, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (726KB)

Accelerated light exposure of wood-containing pulps. part I: effects of wavelength and intensity, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (726KB)

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