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Conference papers
Technical / Economic Analysis of Bamboo Fiber in Pulp and Pa

Technical / Economic Analysis of Bamboo Fiber in Pulp and Paper Manufacture - Part I. Economics of growing bamboo in a plantation for biomass production, 2015 PEERS Conference

Conference papers
COMPRESSED AIR SYSTEMSINVISIBLE MONEY, 2015 PEERS Conference

COMPRESSED AIR SYSTEMSINVISIBLE MONEY, 2015 PEERS Conference

Conference papers
Key Considerations for Successful Integration of Cogeneratio

Key Considerations for Successful Integration of Cogeneration Systems into Existing Pulp Mills, 2015 PEERS Conference

Journal articles
Magazine articles
Open Access
Assessing variation in package modeling, TAPPI Journal April 2021

ABSTRACT: Predictions from empirical models are affected by variability in the input parameters for the data set used to build the models. For corrugated boxes, the difference between actual and modeled compression strength creates a real cost associated with box production, often resulting in boxes that may need to be over-designed to compensate for a lack of model precision. No work to date has attempted to assess the limitation in these compression estimates due to input parameter testing variability. In this paper we approach that problem, initially for the McKee equation and then conceptually for other box models. For our industry to do a better job at meeting the needs of our corrugated packaging customers, we need to reduce the variation in the tests we all rely on, particularly for evaluating material strength (edge crush test [ECT]) and package compression performance (box compression test [BCT]).

Journal articles
Open Access
Deinking evaluation using near infrared narrow band digital

Deinking evaluation using near infrared narrow band digital image analysis, TAPPI JOURNAL August 2016

Journal articles
Magazine articles
SetPoint: Ladies and Gentlemen, The Year You’ve Been Waiting For, Paper360º January/February 2021

SetPoint: Ladies and Gentlemen, The Year You’ve Been Waiting For, Paper360º January/February 2021

Journal articles
Magazine articles
Two Processes: Two Systems?, Paper360º January/February 2021

Two Processes: Two Systems?, Paper360º January/February 2021

Journal articles
Magazine articles
Recycling at Paper Mills: The Benefits of Water-Based Barrier Coatings, Paper360º January/February 2021

Recycling at Paper Mills: The Benefits of Water-Based Barrier Coatings, Paper360º January/February 2021

Journal articles
Magazine articles
Open Access
Probing the molecular weights of sweetgum and pine kraft lignin fractions, TAPPI Journal June 2021

ABSTRACT: The present investigation undertook a systematic investigation of the molecular weight (MW) of kraft lignins throughout the pulping process to establish a correlation between MW and lignin recovery at different extents of the kraft pulping process. The evaluation of MW is crucial for lignin characterization and utilization, since it is known to influence the kinetics of lignin reactivity and its resultant physico-chemical properties. Sweetgum and pine lignins precipitated from black liquor at different pHs (9.5 and 2.5) and different extents of kraft pulping (30•150 min) were the subject of this effort. Gel permeation chromatography (GPC) was used to determine the number average molecular weight (Mn), mass average molecular weight (Mw), and polydispersity of the lignin samples. It was shown that the MW of lignins from both feedstocks follow gel degradation theory; that is, at the onset of the kraft pulping process low molecular weight-lignins were obtained, and as pulping progressed, the molecular weight peaked and subsequently decreased. An important finding was that acetobromination was shown to be a more effective derivatization technique for carbohydrates containing lignins than acetylation, the technique typically used for derivatization of lignin.

Journal articles
Magazine articles
Open Access
Soybean peroxidase treatment of ultra-high kappa softwood pulp to enhance yield and physical properties, TAPPI Journal September 2020

ABSTRACT: The working hypothesis serving as basis for this study is that pulping to a higher kappa number will produce a higher yield pulp, and then treating that pulp with a surface reactive lignin peroxidase to ablate surface lignin will increase specific bonding area. In the present case, the working hypothesis was modified so that soybean peroxidase (SBP) works like lignin peroxidase to modify surface lignin on high-kappa, high-yield softwood pulps to facilitate enhanced fiber-to-fiber bonding such that the resulting paper strength is similar to the lower kappa soft-wood pulp generally used to make linerboard. Soybean peroxidase is actually a plant peroxidase that exhibits lignin peroxidase-like activity. It is not a lignin peroxidase derived from white rot fungus. The current work did show a significant improvement in pulp yield (62.2% vs. 55.2% yield for a 103-kappa control linerboard grade sheet), while treatment with SBP showed that tensile, burst, and STFI properties of the pulp were improved, although more convincing data needs to be obtained.

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