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Journal articles
An overview of ferrography and its use in maintenance, TAPPI JOURNAL, August 1991, Vol. 74(8)
An overview of ferrography and its use in maintenance, TAPPI JOURNAL, August 1991, Vol. 74(8)
Journal articles
Alternative methods for bleaching post consumer waste papers, TAPPI JOURNAL, August 1991, Vol. 74(8)
Alternative methods for bleaching post consumer waste papers, TAPPI JOURNAL, August 1991, Vol. 74(8)
Journal articles
Bleaching of nonwood pulps: can sodium hydroxide be replaced with sodium carbonate in the alkaline extraction of nonwood pulps?, TAPPI JOURNAL, August 1991, Vol. 74(8)
Bleaching of nonwood pulps: can sodium hydroxide be replaced with sodium carbonate in the alkaline extraction of nonwood pulps?, TAPPI JOURNAL, August 1991, Vol. 74(8)
Journal articles
On-machine maintenance, TAPPI JOURNAL, August 1991, Vol. 74(8)
On-machine maintenance, TAPPI JOURNAL, August 1991, Vol. 74(8)
Journal articles
Environmental progress at Howe Sound Pulp & Paper, TAPPI JOURNAL, September 1998, Vol. 81(9)
Environmental progress at howe sound pulp & paper, TAPPI JOURNAL, September 1998, Vol. 81(9)
Journal articles
Design and installation of a rplacement thermal oxidizer for odor abatement, TAPPI JOURNAL, April 1999, Vol. 82(4)
Design and installation of a rplacement thermal oxidizer for odor abatement, TAPPI JOURNAL, April 1999, Vol. 82(4)
Journal articles
Some mechanistic insights for using the streaming current detector to measure wet-end charge, TAPPI JOURNAL, August 1999, Vol. 82(8)
Some mechanistic insights for using the streaming current detector to measure wet-end charge, TAPPI JOURNAL, August 1999, Vol. 82(8)
Journal articles
Engineering quality theme for 1999 tappi engineering/process & product quality conference, TAPPI JOURNAL, December 1999, Vol. 82(12)
Engineering quality theme for 1999 tappi engineering/process & product quality conference, TAPPI JOURNAL, December 1999, Vol. 82(12)
Journal articles
Guest Editorial: Carrying forward the tradition of fundamental research, TAPPI Journal June 2026
Since its first symposium in 1957, the Fundamental Research Symposium has evolved around fundamental research themes aimed at scientifically understanding papermaking. The symposium is organized by the Fundamental Research Committee (FRC), which is operated by the Fundamental Research Society (FRS). The unique format of the symposium, held at universities such as Oxford and Cambridge where participants stay together, fosters intensive academic exchange and collegial interaction.
Journal articles
Magazine articles
Eucalyptus black liquor properties in a lignin extraction process: density, dry solids, viscosity, inorganic, and organic content, TAPPI Journal March 2023
ABSTRACT: Extracting lignin from black liquor is becoming more common, although only a few research papers discuss the impact of the process on the liquor’s primary properties. This work aims to determine the changes in black liquor properties as it undergoes a lignin extraction process using carbon dioxide (CO2). A diluted eucalyptus black liquor sample (DBL) was acidified with CO2 to a final pH of 8.5. After filtration, the kraft lignin was removed, and the filtrated lignin lean black liquor (LLBL) was collected. Five acidified black liquors (ABL) samples were collected during acidification at pH 10.5; 10.0; 9.5; 9.0; and 8.5. The samples were analyzed regarding lignin content in solution, sodium carbonate (Na2CO3), sodium sulfate (Na2SO4), density, dry solids content, and viscosity. While Na2SO4 remained almost constant, Na2CO3 presented an enormous increase in its concentration when comparing DBL with LLBL. As pH decreased, the lignin content in the solution was also reduced due to lignin precipitation. The results showed similar behavior for dry solids, density, and viscosity of the supernatant, but an increase in density was observed around pH 9.00. In light of this, the density of LLBL turns out to be closer to the one in the initial DBL. The significant increase in carbonate content could explain this behavior during acidification with CO2 once the inorganic content significantly influences the property. The viscosity was determined from 10 s-1 to 2000 s-1. We observed a Newtonian behavior for all samples. The increase in carbonate content in the sample is crucial information to the recovery cycle, especially for calculating the mass and energy balance when targeting the use of the LLBL.