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Journal articles
Use of enzymes for reduction in refining energy - laboratory
Use of enzymes for reduction in refining energy - laboratory studies, TAPPI JOURNAL, November 2006
Journal articles
Magazine articles
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.
Journal articles
Magazine articles
Recovery boiler back-end heat recovery, TAPPI Journal March 2023
ABSTRACT: Sustainability and efficient use of resources are becoming increasingly important aspects in the operation of all industries. Recently, some biomass-fired boilers have been equipped with increasingly complex condensing back-end heat recovery solutions, sometimes also using heat pumps to upgrade the low-grade heat. In kraft recovery boilers, however, scrubbers are still mainly for gas cleaning, with only simple heat recovery solutions. In this paper, we use process simulation software to study the potential to improve the power generation and energy efficiency by applying condensing back-end heat recovery on a recovery boiler. Different configurations are considered, including heat pumps. Potential streams to serve as heat sinks are considered and evaluated. Lowering the recovery boiler flue gas temperature to approximately 65°C significantly decreases the flue gas losses. The heat can be recovered as hot water, which is used to partially replace low-pressure (LP) steam, making more steam available for the condensing steam turbine portion for increased power generation. The results indicate that in a simple condensing plant, some 1%•4% additional electricity could be generated. In a Nordic mill that provides district heating, even more additional electricity generation, up to 6%, could be achieved. Provided the availability of sufficient low-temperature heat sinks to use the recovered heat, as well as sufficient condensing turbine swallowing capacity to utilize the LP steam, the use of scrubbing and possibly upgrading the heat using heat pumps appears potentially useful.
Journal articles
Magazine articles
Ultrastructural Behavior of Cell Wall Polysaxxharides, TAPPI Journal April 2022
ABSTRACT: Considerable information on the ultrastructural organization of the plant cell wall and the supermolecular arragement of the cell wall components, in particular of cellulose, has been obtained with the electron microscope.
Journal articles
Comparative papermaking properties of oil-palm empty fruit bunch, TAPPI JOURNAL, January 2001, Vol. 84(1)
Comparative papermaking properties of oil-palm empty fruit bunch, TAPPI JOURNAL, January 2001, Vol. 84(1)
Journal articles
Arundo donax l. reed: new perspectives for pulping and bleaching 1. raw material characterisation, TAPPI JOURNAL, January 2001, Vol. 84(1)
Arundo donax l. reed: new perspectives for pulping and bleaching 1. raw material characterisation, TAPPI JOURNAL, January 2001, Vol. 84(1)
Journal articles
Recycling old telephone directories, TAPPI JOURNAL, January 2001, Vol. 84(1)
Recycling old telephone directories, TAPPI JOURNAL, January 2001, Vol. 84(1)
Journal articles
An Improved method for analyzing resin acid in wood, pulp, process water, and effluent samples, TAPPI JOURNAL, April 2000, Vol. 83(4)
An Improved method for analyzing resin acid in wood, pulp, process water, and effluent samples, TAPPI JOURNAL, April 2000, Vol. 83(4)
Journal articles
Calcium in pulping and bleaching, TAPPI JOURNAL, December 2000, Vol. 83(12)
Calcium in pulping and bleaching, TAPPI JOURNAL, December 2000, Vol. 83(12)
Journal articles
A Kids' View of 'Forests For Our Future', TAPPI JOURNAL, January 2000, Vol. 83(1)
A Kids' View of 'Forests For Our Future', TAPPI JOURNAL, January 2000, Vol. 83(1)