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Journal articles
Magazine articles
Open Access
Effect of high sulfate content on viscosity of recovery boiler molten smelt, TAPPI Journal March 2024

ABSTRACT: A systematic study was conducted to examine the effect of high sulfate content on the freezing temperature of molten smelt and how this may contribute to the formation of viscous jellyroll smelt in recovery boilers. The results show that even for recovery boilers with a smelt reduction as low as 70%, the sulfate content in smelt has no or little effect on smelt freezing temperature, and hence, on molten smelt fluidity. The perceived adverse effect of high sulfate content on smelt fluidity and on jellyroll smelt formation comes from the high sulfate content in deposits that have fallen from the upper furnace. Fallen deposits may or may not form jellyroll smelt, depending on whether or not they can melt and be well-mixed with molten smelt by the time they reach the smelt spouts. It is not the high sulfate content in smelt resulting from the low smelt reduction efficiency that makes molten smelt viscous and forms jellyroll smelt, but rather, it is the incomplete melting of fallen deposits that results in one of the proposed mechanisms for jellyroll smelt formation.

Journal articles
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Open Access
Editorial: TAPPI Journal 2019 Best Research Paper addresses hard scale formation in green liquor pipelines, TAPPI Journal March 2020

ABSTRACT: TAPPI and the TAPPI Journal (TJ) Editorial Board would like congratulate the authors of the 2019 TAPPI Journal Best Research Paper Award: Alisha Giglio, Vladimiros Papangelakis, and Honghi Tran. Their paper, “The solubility of calcium carbonate in green liquor handling systems,” appeared on p. 595 of the October 2019 issue. This kraft recovery cycle research was recognized by the TJ Editorial Board for its innovation, creativity, scientific merit, and clear expression of ideas.

Journal articles
Magazine articles
Open Access
Synthesis of filtrate reducer from biogas residue and its application in drilling fluid, TAPPI Journal March 2020

ABSTRACT: Biogas residues (BR) containing cellulose and lignin are produced with the rapid development of biogas engineering. BR can be used to prepare the filtrate reducer of water-based drilling fluid in oilfields by chemical modification. BR from anaerobically fermenting grain stillage was alkalized and etherified by caustic soda and chloroacetic acid to prepare filtrate reducer, which was named as FBR. The long-chain crystalline polysaccharides were selected as dispersing agents (DA), and the water-soluble silicate was used as the cross-linking agent. After the hot rolling of FBR in saturated saltwater base mud for 16 h at 120°C, the filtration loss was increased from 7.20 mL/30 min before aging to 8.80 mL/30 min after aging. Compared with the commercial filtrate reducers, FBR had better tolerance to high temperature and salt, and lower cost.

Journal articles
Magazine articles
Open Access
Alternative “green” lime kiln fuels: Part II—Woody biomass, bio-oils, gasification, and hydrogen, TAPPI Journal May 2020

ABSTRACT: This paper is the second of a two-part series on “green” lime kiln fuels. The first part of this work reviews the use of pulp mill and recovery byproducts as either full or partial replacement of oil or natural gas in the kiln. The second part reviews the use of various forms of woody biomass, bio-oils, gasification and hydrogen as potential carbon neutral or carbon-free lime kiln fuels. Several of these options require specialized burners to supply the fuel to the kiln and high-quality metallurgy to withstand the acidic conditions of the fuel.

Journal articles
Open Access
Evaluation of the us epa recommended approach to predicting air emissions from pulp and paper industry landfills, TAPPI JOURNAL, December 1999, Vol. 82(12)

Evaluation of the us epa recommended approach to predicting air emissions from pulp and paper industry landfills, TAPPI JOURNAL, December 1999, Vol. 82(12)

Journal articles
Open Access
Recovery modernization at stora enso's skutskar kraft mill, TAPPI JOURNAL, December 1999, Vol. 82(12)

Recovery modernization at stora enso's skutskar kraft mill, TAPPI JOURNAL, December 1999, Vol. 82(12)

Journal articles
Open Access
Modeling studies of a composite tube floor in black liquor recovery boilers, TAPPI JOURNAL, December 1999, Vol. 82(12)

Modeling studies of a composite tube floor in black liquor recovery boilers, TAPPI JOURNAL, December 1999, Vol. 82(12)

Journal articles
Open Access
Amine boranes as new reductive bleaching chemicals on softwood pulp single stage and multistage processes, TAPPI JOURNAL, February 1999, Vol. 82(2)

Amine boranes as new reductive bleaching chemicals on softwood pulp single stage and multistage processes, TAPPI JOURNAL, February 1999, Vol. 82(2)

Journal articles
Open Access
A cradle-to-gate life cycle assessment of straw pulp incorporation into telephone directory-grade paper, TAPPI JOURNAL, February 1999, Vol. 82(2)

A cradle-to-gate life cycle assessment of straw pulp incorporation into telephone directory-grade paper, TAPPI JOURNAL, February 1999, Vol. 82(2)

Journal articles
Open Access
Factors affecting the partitioning of methanol vapor-liquid phases in black liquors, TAPPI JOURNAL, February 1999, Vol. 82(2)

Factors affecting the partitioning of methanol vapor-liquid phases in black liquors, TAPPI JOURNAL, February 1999, Vol. 82(2)

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