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Journal articles
Organizational arrangements of U.S. wood-based companies involved in direct foreign investment, TAPPI JOURNAL May 1989
Organizational arrangements of U.S. wood-based companies involved in direct foreign investment, TAPPI JOURNAL May 1989
Journal articles
Effects of freeness and consistency on the viscosity of hardwood and softwood pulp suspensions, TAPPI JOURNAL May 1989
Effects of freeness and consistency on the viscosity of hardwood and softwood pulp suspensions, TAPPI JOURNAL May 1989
Journal articles
Dechlorination and decolorization of high-molecular-weight chlorolignin from bleach plant effluents by an oxidation process, TAPPI JOURNAL September 1989
Dechlorination and decolorization of high-molecular-weight chlorolignin from bleach plant effluents by an oxidation process, TAPPI JOURNAL September 1989
Journal articles
Development and verification of a predictive oxygen delignification model for hardwood and softwood kraft pulp, TAPPI JOURNAL September 1989
Development and verification of a predictive oxygen delignification model for hardwood and softwood kraft pulp, TAPPI JOURNAL September 1989
Journal articles
The SEI facility for fluid-bed wood gasification, TAPPI JOURNAL September 1989
The SEI facility for fluid-bed wood gasification, TAPPI JOURNAL September 1989
Magazine articles
A waste management program for paper mill sludge high in ash, TAPPI JOURNAL, April 1990, Vol. 73(4)
A waste management program for paper mill sludge high in ash, TAPPI JOURNAL, April 1990, Vol. 73(4)
Journal articles
Using bacteriophage for slime control in the paper mill, TAPPI JOURNAL, August 1990, Vol. 73(8)
Using bacteriophage for slime control in the paper mill, TAPPI JOURNAL, August 1990, Vol. 73(8)
Journal articles
Magazine articles
Characterizing rheological behavior and fluidization of highly refined furnishes, TAPPI Journal April 2024
ABSTRACT: In this work, highly refined softwood bleached kraft pulp (SWBKP) furnishes, referred to here as XFC, were studied from the perspective of fiber suspension handling in processing. The rheology of the furnishes was studied with a rotational rheometer using a non-standard flow geometry to understand the viscosity development at different consistencies and the impact of temperature. For fluidization analysis during pipe flow, two optical methods were implemented; namely, optical coherence tomography (OCT) and high-speed video (HSV) imaging. The OCT was used to determine the small-scale floc structures near the pipe wall where the shear stress is highest, and the HSV imaging was applied for observing flow instabilities and XFC suspension uniformity at the pipe scale. All these issues can be significant in deciding the minimum flow rate required for a process pipe to get sufficient fluidization of XFC suspensions.
Journal articles
Magazine articles
Dynamic out-of-plane compression of paperboard — Influence of impact velocity on the surface, TAPPI Journal February 2024
ABSTRACT: Processes that convert paperboard into finished products include, for example, printing, where the paperboard is subjected to rapid Z-directional (ZD) compression in the print nip. However, measuring and evaluating the relevant properties in the thickness direction of paperboard are not necessarily straightforward or easy. Measuring at relevant, millisecond deformation rates further complicates the problem. The aim of the present work is to elucidate some of the influences on the compressive stiffness. Both the initial material response and the overall compressibility of the paperboard is studied. In this project, the effect on the material response from the surface structure and the millisecond timescale recovery is explored.The method utilized is a machine called the Rapid ZD-tester. The device drops a probe in freefall on the substrate and records the probe position, thus acquiring the deformation of the substrate. The probe is also allowed to bounce several times on the surface for consecutive impacts before being lifted for the next drop. To investigate the time dependent stiffness behavior, the probe is dropped several times at the same XY position on the paperboard from different heights, thus achieving different impact velocities. The material response from drops and bounces combined allows study of the short-term recovery of the material. The material in the study is commercial paperboard. The paperboard samples are compared to material where the surface has been smoothed by grinding it. Our study shows that there is a non-permanent reduction in thickness and a stiffening per bounce of the probe, indicating a compaction that has not recovered in the millisecond timescale. Additionally, a higher impact velocity has an initial stiffening effect on the paperboard, and this is reduced by smoothing the surface.
Journal articles
Magazine articles
Editorial: TAPPI Journal Best Research Paper for 2023 focuses on black liquor concentration using graphene oxide membranes, TAPPI Journal February 2024
ABSTRACT: TAPPI and the TAPPI Journal (TJ) Editorial Board would like congratulate the authors of the 2023 TAPPI Journal Best Research Paper Award and Honghi Tran Prize: Sam Rae, Ella V. Richards, Max Kleiman-Lynch, Brent D. Keller, and Brandon I. Macdonald. Their paper, “Pilot scale black liquor concentration using pressure driven membrane separation,” appeared on p. 223 of the April 2023 issue. This kraft recovery cycle research was recognized by the TAPPI Journal Editorial Board for its innovation, creativity, scientific merit, and clear expression of ideas.