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Using Waste Heat to Generate Electricity, 2008 Engineering, Pulping and Environmental Conference

Using Waste Heat to Generate Electricity, 2008 Engineering, Pulping and Environmental Conference

Characteristics of High Yield Pulp (HYP) and Their Effects on the Wet-end Chemistry of the Papermaking Process, 2008 PAPERCON Conference

Characteristics of High Yield Pulp (HYP) and Their Effects on the Wet-end Chemistry of the Papermaking Process, 2008 PAPERCON Conference

Paper strength factors in systems with nanofibrillated cellulose, cationic starch, colloidal silica, cationic acrylamide copolymer, and hydrodynamic shear, TAPPI Journal May 2025

ABSTRACT: Laboratory paper sheets were formed by first pretreating nanofibrillated cellulose (NFC) with cationic starch at the 5% level by mass. The treated NFC was then added to stock prepared from 100% recycled copy paper. The combined furnish was next optionally treated with a cationic retention aid (cPAM, 0.1%) and then colloidal silica (0.1% or 0.2%). Vacuum dewatering, fine-particle retention, and several paper properties were studied as a function of the colloidal silica level (zero, 1%, and 2%) and at different levels of shear stress applied just before forming the sheets. Dewatering and strength results were generally more favorable when using a medium charge cationic starch (~ 0.03 degree of substitution, DS) to pretreat the NFC rather than a high charge density cationic starch (~ 0.2 DS). In each case, the dewatering was further enhanced by subsequent treatments by cPAM (0.1% on whole furnish solids) and then even more with the final addition of colloidal silica (0.1% and 0.2% levels compared). However, the colloidal silica additions progressively hurt the tensile strength of the paper, especially in the case of the high charge cationic starch and at the higher level of colloidal silica. Though the dewatering performance was favorable, in such cases, the paper strength was not improved compared to paper made without any NFC. The fact that the systems involving cPAM treatment, and especially those involving both cPAM and colloidal silica, tended to reduce the resulting paper’s tensile strength supports a mechanism in which the additives result in the clustering of the NFC, possibly in multiparticle bunches. Evidence suggests that such bunches of clustered NFC particles, which are difficult to redisperse even at levels of hydrodynamic shear present in high-speed paper machine systems, are resistant to full integration into the sheet structure as the paper is being formed.

Fractionation of Organochlorinated Compounds By Ultrafiltration, 1992 Environmental Conference Proceedings

Fractionation of Organochlorinated Compounds By Ultrafiltration, 1992 Environmental Conference Proceedings

Scrubbing NCG With White Liquor to Remove Reduced Sulfur Gases, 2004 International Chemical Recovery Conference

Scrubbing NCG With White Liquor to Remove Reduced Sulfur Gases, 2004 International Chemical Recovery Conference

Pacific TAPPI KilnCon 2019.pdf

pacific-tappi-kilncon-2019.pdf

Analysis of caustic soda, Test Method T 613 cm-23

Analysis of caustic soda, Test Method T 613 cm-23

Analysis of rosin, Test Method T 621 cm-23

Analysis of rosin, Test Method T 621 cm-23

2023 CorrExpo Attendee List as of August 11.pdf