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Journal articles
Open Access
Passivation of pressure sensitive adhesive stickies by addit

Passivation of pressure sensitive adhesive stickies by addition of acrylic fibers to OCC pulp before papermaking, October 2016 TAPPI JOURNAL

Conference papers
Reduce Downtime by Eliminating Common Carrier Rope Problems, 18PaperCon

Reduce Downtime by Eliminating Common Carrier Rope Problems, 18PaperCon

Conference papers
Innovative Filling Design Driving Optimization of Dispersion Systems, 18PaperCon

Innovative Filling Design Driving Optimization of Dispersion Systems, 18PaperCon

Conference papers
Improving the Inkjet Printability of Folding Boxboard, 18PaperCon

Improving the Inkjet Printability of Folding Boxboard, 18PaperCon

Conference papers
Rheological Characterization of Tack and Viscoelasticity of Compositions of Crepe Coating Used in The Yankee Dryer, 19PaperCon

Rheological Characterization of Tack and Viscoelasticity of Compositions of Crepe Coating Used in The Yankee Dryer, 19PaperCon

Conference papers
Lignin Based Resins for High-Pressure Paper Laminates, 19PaperCon

Lignin Based Resins for High-Pressure Paper Laminates, 19PaperCon

Conference papers
Select the Right Brown Stock Defoamer for your Washing Operations, 19PEERS

Select the Right Brown Stock Defoamer for your Washing Operations, 19PEERS

Journal articles
Magazine articles
Open Access
Kraft pulp bleaching with a P-stage catalyzed by both bicarbonate and TAED, TAPPI Journal July 2019

ABSTRACT: Peroxide bleaching of softwood and hardwood (eucalypt) kraft pulps was performed in solutions of sodium bicarbonate (NaHCO3), sodium carbonate (Na2CO3), and sodium hydroxide (NaOH). The conventional P stage (hydrogen peroxide + sodium hydroxide; H2O2 + NaOH) was the most effective brightening system without an additional activator. However, peroxide activation by bicarbonate anion (HCO3•) was obvious in all cases where NaHCO3 or Na2CO3 was used. When N,N,N’,N’-tetraacetylethylenediamine (TAED) was added to the bleaching sys-tem, Na2CO3 as the alkali source afforded equal or slightly higher bleached brightness compared to NaOH usage for both the softwood and hardwood pulps. This outcome is attributed to simultaneous peroxide activation by HCO3• and TAED. When applied to the eucalypt pulp, the H2O2/Na2CO3/TAED bleaching system also decreased the bright-ness loss due to thermal reversion.

Journal articles
Magazine articles
Open Access
The sticky behavior of pulp and paper mill biosludge during drying, TAPPI Journal June 2019

ABSTRACT: Pulp and paper mill biosludge becomes sticky after being dried to a certain solids content. As bio-sludge becomes sticky, it agglomerates and adheres to the heat transfer surfaces of the dryer. This undesirable property can lower the dryer efficiency and cause the drying equipment to fail.A systematic study was conducted to examine the sticky behavior of biosludge. The stickiness was evaluated by measuring the adhesive force between a sludge cake and a stainless steel substrate, and the cohesive force between a sludge cake and a sludge substrate. The results show that: i) both adhesive and cohesive forces increase markedly as the solids content increases, reaching a maximum value at about 13% solids, and then decrease steadily at a high-er solids content; ii) cohesive force is stronger than adhesive force, implying that biosludge tends to agglomerate rather than adhere to smooth equipment surfaces; and iii) mixing wood fines or fly ash from a biomass boiler reduc-es the stickiness of the mixture. These findings may help mills improve the thermal efficiency of biosludge dryers and to turn biosludge into a more attractive fuel for burning in biomass boilers.

Journal articles
Open Access
Acoustic analysis of recovery boiler dissolving tank operati

Acoustic analysis of recovery boiler dissolving tank operation and smelt shattering efficiency, TAPPI JOURNAL September 2016

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