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Journal articles
Guest Editorial: TAPPI Journal showcases the best of PEERS 2012, TAPPI JOURNAL July 2013
Guest Editorial: TAPPI Journal showcases the best of PEERS 2012, TAPPI JOURNAL July 2013
Journal articles
Impact of lignin and carbohydrate chemical structures on kraft pulping processes and biofuel production, TAPPI JOURNAL July 2013
Impact of lignin and carbohydrate chemical structures on kraft pulping processes and biofuel production, TAPPI JOURNAL July 2013
Journal articles
Formation of pirssonite in green liquor handling systems, TAPPI JOURNAL July 2013
Formation of pirssonite in green liquor handling systems, TAPPI JOURNAL July 2013
Journal articles
Performance of alternate superheater materials in a potassium-rich recovery boiler environment, TAPPI JOURNAL July 2013
Performance of alternate superheater materials in a potassium-rich recovery boiler environment, TAPPI JOURNAL July 2013
Journal articles
Hydrogen peroxide and caustic soda: Dancing with a dragon while bleaching, TAPPI JOURNAL July 2013
Authors: Peter W. Hart; Carl Houtman; and Kilby Hirth | ABSTRACT: When hydrogen peroxide is mixed with caustic soda, an auto-accelerating reaction can lead to generation of significant amounts of heat and oxygen. On the basis of experiments using typical pulp mill process concentration and temperatures, a relatively simple kinetic model has been developed. Evaluation of these model results reveals that hydrogen peroxide-caustic soda systems are extremely sensitive to hydrogen peroxide:caustic soda ratio, transition metal contamination, and temperature. Small changes in initial conditions can result in a closed system becoming explosive. Analysis of model results was used to develop guidelines for safer application of hydrogen peroxide in a mill setting.
Journal articles
Removal of silicon from green liquor with carbon dioxide in the chemical recovery process of wheat straw soda pulping, TAPPI JOURNAL March 2013
Removal of silicon from green liquor with carbon dioxide in the chemical recovery process of wheat straw soda pulping, TAPPI JOURNAL March 2013
Journal articles
Effects of flashing on spray characteristics of splashplate nozzles, TAPPI JOURNAL May 2013
Effects of flashing on spray characteristics of splashplate nozzles, TAPPI JOURNAL May 2013
Journal articles
Toward environmental resilience in pulp and paper manufacturing: Water consumption and carbon dioxide emission reductions, TAPPI Journal September 2025
ABSTRACT: Pulp and paper manufacturing is a water- and energy-intensive industrial sector, necessitating improvement of its operational efficiency, as well as reduction of emissions to the maximum extent possible. This review focuses on the reduction of water consumption and carbon dioxide (CO2) emissions that originate in the pulp and paper industry (PPI). First, process simulation and optimization techniques used for water consumption reduction are reviewed. Then, techno-economic analyses of solvent-based CO2 capture from PPI are discussed. Additionally, key actions are proposed for enhancing water consumption reduction and CO2 capture in PPI.
Journal articles
Support for innovation and workforce development, TAPPI Journal August 2026
Advanced manufacturing is gaining attention in developed economies due to national security issues, calls for developing domestic supply chains, and more importantly, the need for creating jobs. COVID-19 exposed vulnerabilities in the manufacturing of lifesaving and critical items such as N95 masks. Tariffs are considered one avenue to protect domestic manufacturing, but in the case of manufactured products like commodity textiles, a tariff barrier alone will not be able to bring back manufacturing. It is a beneficial move by the U.S. government to boost manufacturing through investments in research and development (R&D), enhancing the advanced manufacturing sector focusing on defense and medical items through the establishment of centers like the Advanced Functional Fabrics of America. Additionally, schemes to grow a skilled workforce both at factory and R&D levels will be valuable.
Journal articles
Comparative evaluation of conical and double disk refiners: Effects of operating mode, refining intensity, and device geometry on energy consumption and paper properties, TAPPI Journal August 2026
ABSTRACT: This study investigates the effects of refiner operating mode and refining intensity adjusted via pulp flow rate, applied power, and refiner speed on the refining characteristics of high-yield southern softwood. We compared Valmet’s OptiFiner PRO (conical) and DD6700 (double disk) refiners under matched specific edge load (SEL) conditions. Batch and one-pass modes were evaluated for their impact on energy efficiency and physical paper properties. The results showed that while SEL provides a useful baseline, it does not fully account for differences in refiner geometry, particularly angular parameters. With the chosen plate sets, C-factor analysis revealed that the OptiFiner PRO delivers a lower number of fiber impacts at a higher intensity per impact compared to DD6700 at similar SEL, influencing fiber length, short-span compression test (STFI) index, and tear strength development. These findings offer actionable insights for mills seeking to optimize refining efficiency and cost. In summary, conical refiners may provide advantages in compression strength at mid-range energies, while double disk refiners maintain higher tear strength at elevated energies due to better fiber length preservation.