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Journal articles
Use of cold tolerant eucalyptus species as a partial replacement for southern mixed hardwoods, TAPPI JOURNAL July 2012
Use of cold tolerant eucalyptus species as a partial replacement for southern mixed hardwoods, TAPPI JOURNAL July 2012
Journal articles
The role of copper ions in hydrogen peroxide bleaching: Their origin, removal, and effect on pulp quality, TAPPI JOURNAL July 2012
The role of copper ions in hydrogen peroxide bleaching: Their origin, removal, and effect on pulp quality, TAPPI JOURNAL July 2012
Journal articles
Multi-scale simulation of paperboard edge wicking using a fiber-resolving virtual paper model, TAPPI JOURNAL June 2012
Multi-scale simulation of paperboard edge wicking using a fiber-resolving virtual paper model, TAPPI JOURNAL June 2012
Journal articles
Prebleaching of eucalypt kraft pulp with OP stages: Effect of an acid pretreatment or chelation step, TAPPI JOURNAL June 2012
Prebleaching of eucalypt kraft pulp with OP stages: Effect of an acid pretreatment or chelation step, TAPPI JOURNAL June 2012
Journal articles
A new method for characterizing turbulent mixing in semiconcentrated suspensions, TAPPI JOURNAL November 2011
A new method for characterizing turbulent mixing in semiconcentrated suspensions, TAPPI JOURNAL November 2011
Journal articles
Magazine articles
Multifunctional starch-based barrier materials, TAPPI Journal August 2021
ABSTRACT: Natural and renewable polymer-based barrier materials play an inevitable role in a sustainable economy. Most commercially available barrier materials are either based on multiple layers of synthetic polymers or petroleum-based chemicals. Tremendous amounts of research are being done in academia and industry to replace these synthetic barrier materials with natural and environmentally friendly materials. The current work summarizes the application of starch-based materials for various barrier applications, such as water vapor, oxygen, liquid water, oil, and grease. Also, exotic starch-based barrier materials for the application of sound, ultraviolet, and thermal barrier applications are reviewed. The potential of starch-based materials to offer antimicrobial and antiviral properties is discussed. Finally, commercially available starch-based barrier materials have been summarized.
Journal articles
Magazine articles
Mechanical modification of softwood pulp fibers using a novel lightweight vertical bar plate, TAPPI Journal April 2021
ABSTRACT: Refiner plates made using sand casting have a draft angle, which results in a trapezoidal bar shape. These trapezoidal bar plates have a limited throughput compared to the vertical bar plates, and eventually the edges of the bars become dull, resulting in longer time to reach the target freeness and shorter service life. The new light-weight refiner plate with a bar insertion method into a plate base was developed by selecting an aluminium-based alloy as the plate base material and a stainless steel alloy with high wear resistance as the bar material. The light-weight plate with sharp bar edges was very effective in reducing refining energy by reaching the target freeness faster than the sand-cast bar plate. Finally, the lightweight sharp bar plate, which weighed only about half the weight of the cast bar plate, was expected to significantly contribute to easy replacement, improved paper quality, and larger throughput without excessive loss of fiber length.
Journal articles
Peroxomolybdate Catalysts in Pulp Hydrogen Peroxide Bleaching: Improvement Inhexeneuronic Acid Removal and Delignification, TAPPI JOURNAL March 2008
Peroxomolybdate Catalysts in Pulp Hydrogen Peroxide Bleaching: Improvement Inhexeneuronic Acid Removal and Delignification, TAPPI JOURNAL March 2008
Journal articles
Magazine articles
A case study review of wood ash land application programs in North America, TAPPI Journal February 2021
ABSTRACT: Several regulatory agencies and universities have published guidelines addressing the use of wood ash as liming material for agricultural land and as a soil amendment and fertilizer. This paper summarizes the experiences collected from several forest products facility-sponsored agricultural application programs across North America. These case studies are characterized in terms of the quality of the wood ash involved in the agricultural application, approval requirements, recommended management practices, agricultural benefits of wood ash, and challenges confronted by ash generators and farmers during storage, handling, and land application of wood ash.Reported benefits associated with land-applying wood ash include increasing the pH of acidic soils, improving soil quality, and increasing crop yields. Farmers apply wood ash on their land because in addition to its liming value, it has been shown to effectively fertilize the soil while maintaining soil pH at a level that is optimal for plant growth. Given the content of calcium, potassium, and magnesium that wood ash supplies to the soil, wood ash also improves soil tilth. Wood ash has also proven to be a cost-effective alternative to agricultural lime, especially in rural areas where access to commercial agricultural lime is limited. Some of the challenges identified in the review of case studies include lengthy application approvals in some jurisdictions; weather-related issues associated with delivery, storage, and application of wood ash; maintaining consistent ash quality; inaccurate assessment of required ash testing; potential increased equipment maintenance; and misconceptions on the part of some farmers and government agencies regarding the effect and efficacy of wood ash on soil quality and crop productivity.
Journal articles
Magazine articles
Continuous tannin extraction by use of screw reactor, TAPPI Journal February 2021
ABSTRACT: A pilot-size screw reactor (extraction unit) was used for tannin extraction of spruce. Yield of the same magnitude or better was obtained when comparing a screw reactor with batch reactors. A longer presoaking time in water seemed to be better than a short one for obtaining higher yield. A higher yield is obtained with lower dry-water ratio, which suggests that the internal diffusion in bark does not determine mass transfer as much as is the case without presoaking of bark. The higher dry-water ratio decreased the yield. The prior soaking of the bark also minimized the mechanical reactor feeding problems (clogging). The benefits of a screw reactor likely are that run time changes for different process conditions are flexible; it simplifies design and construction of an industrial unit for tannin production; and it saves space because of the need for fewer and smaller intermediate storage tanks.