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The role of hornification in the deterioration mechanism of physical properties of unrefined eucalyptus fibers during paper recycling, TAPPI Journal February 2024

ABSTRACT: Physical properties of cellulosic paper deteriorate significantly during paper recycling, which hinders the sustainable development of the paper industry. This work investigates the property deterioration mechanism and the role of hornification in the recycling process of unrefined eucalyptus fibers. The results showed that during the recycling process, the hornification gradually deepened, the fiber width gradually decreased, and the physical properties of the paper also gradually decreased. After five cycles of reuse, the relative bonding area decreased by 17.6%, while the relative bonding force decreased by 1.8%. Further results indicated that the physical property deterioration of the paper was closely related to the decrease of fiber bonding area. The fiber bonding area decreased linearly with the reduction of re-swollen fiber width during paper recycling. Re-swollen fiber width was closely related to the hornification. Hornification mainly reduces the bonding area of unrefined eucalyptus fiber rather than the bonding force. The work elucidates the role of hornification in the recycling process of unrefined eucalyptus fibers and the deterioration mechanism of paper physical properties, which will be helpful to control the property deterioration of paper and achieve a longer life cycle.

Biofuels in lime kilns • Operating experience in the Nordic pulp and paper industry, TAPPI Journal October 2024

ABSTRACT: The lime reburning process is a central part of the chemical pulp mill. It is energy intensive and consumes large amounts of fossil fuel, globally consuming about 50 terawatt-hours (TWh) of fuel per year. Conversion to operation with biofuel is interesting, both to reduce carbon dioxide emissions and to reduce costs. Researchers interviewed managers in mills that use solid, liquid, or gasified biofuels to replace fuel oil or natural gas in their lime kilns, and they conducted surveys related to fuel consumption and operations and maintenance. In Sweden and Finland, there were ten mills in 2020 using biomass powder or gasified biomass as the primary fuel, and two more installations were under construction. There were also nine installations in operation or under construction outside the Nordic countries. Fourteen mills in Sweden and two mills in Finland used tall oil pitch as the main fuel. Fuel consumption in Swedish lime kilns was 3.8 TWh in 2020, and 90% of this energy was supplied with biofuels. Of about 4.2 TWh used in Finnish lime kilns, approximately 45% was supplied with biofuels. Developments in the design of the fuel supply system include belt dryers being used in all new installations and mass flow metered dosing systems being used in most new pulverized fuel installations. Bark gasifiers have increased considerably in size. Lignin powder firing has been established as a proven option. A solution for many Swedish and Finnish mills is the use of tall oil pitch as a replacement for fuel oil.

Biocomposites through foam-forming of long fiber suspensions, TAPPICon24

Innovative Sleeve Roll Technology Transforms Forming Section Dewatering with Forming Fabric Compression, TAPPICon24

Fast evaluation of spatial coating layer formation using ultraviolet scanner imaging

Fast evaluation of spatial coating layer formation using ultraviolet scanner imaging, TAPPI JOURNAL August 2015

Effects of the Partial Replacement of SB latex with Dextrin Starch on the Thickness Distribution of Coating Layers, 2008 Advanced Coating Fundamentals Symposium

Effects of the Partial Replacement of SB latex with Dextrin Starch on the Thickness Distribution of Coating Layers, 2008 Advanced Coating Fundamentals Symposium

Novel Particle Size Characterization of Coating Pigments: Comparing Acoustic Spectroscopy with Laser Light Scattering and Sedimentation Techniques, 2008 Advanced Coating Fundamentals Symposium

Novel Particle Size Characterization of Coating Pigments: Comparing Acoustic Spectroscopy with Laser Light Scattering and Sedimentation Techniques, 2008 Advanced Coating Fundamentals Symposium

Plastics Recycling: Looking Ahead, 1991 Hot Melt Symposium Proceedings

Plastics Recycling: Looking Ahead, 1991 Hot Melt Symposium Proceedings

An analytical approach to assess the interrelation of surface properties and softness of tissue paper, TAPPI Journal February 2023

The effect of pulp screening on oxygen delignification of high lignin content pulps, TAPPI Journal October 2025

Application: Yield can be improved and energy demand reduced in the kraft pulping process by terminating cooking at a high kappa number and applying oxygen delignification directly to unscreened pulp. This study demonstrates that oxygen delignification is effective on high-lignin-content pulps without prior screening and without compromising the pulp properties.