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TAPPI Journal Summaries, Paper360º September/October 2022
TAPPI Journal Summaries, Paper360º September/October 2022
Journal articles
Magazine articles
Evaluation of soap recovery efficiency from black liquor — analytical tools, TAPPI Journal April 2023
ABSTRACT: Soap skimmings (“soap”) are typically recovered from black liquor in kraft mills that process a high percentage of softwood. In many mills, the recovery of soap is inefficient, negatively impacting performance of evaporators and recovery boilers and resulting in loss of potential revenue. A thorough evaluation of soap recovery performance in a kraft mill requires measurement of soap content in black liquor at various sampling locations, especially around the soap skimmer.The standard laboratory method for evaluating soap content in black liquor is a complex, multi-step process that relies on solvent extraction and titration; most mills send these samples to an outside laboratory for this analysis. In this study, 100 black liquor samples, with a wide range of soap concentrations, were tested by the standard solvent extraction method. After additional dilution, each sample was also tested for surface tension with a bubble pressure tensiometer. The results were found to correlate very closely with the solvent extraction tests results. This alternate method, using surface tension measurements of diluted black liquor samples, produces rapid results and can be easily implemented in most kraft mills, which would facilitate much more frequent in-house evaluations of soap recovery performance.
Journal articles
Characterization of refined papermaking pulps using hydrodynamic parameters from filtration analysis, TAPPI JOURNAL May 2015
Characterization of refined papermaking pulps using hydrodynamic parameters from filtration analysis, TAPPI JOURNAL May 2015
Journal articles
Magazine articles
A case study review of wood ash land application programs in North America, TAPPI Journal February 2021
ABSTRACT: Several regulatory agencies and universities have published guidelines addressing the use of wood ash as liming material for agricultural land and as a soil amendment and fertilizer. This paper summarizes the experiences collected from several forest products facility-sponsored agricultural application programs across North America. These case studies are characterized in terms of the quality of the wood ash involved in the agricultural application, approval requirements, recommended management practices, agricultural benefits of wood ash, and challenges confronted by ash generators and farmers during storage, handling, and land application of wood ash.Reported benefits associated with land-applying wood ash include increasing the pH of acidic soils, improving soil quality, and increasing crop yields. Farmers apply wood ash on their land because in addition to its liming value, it has been shown to effectively fertilize the soil while maintaining soil pH at a level that is optimal for plant growth. Given the content of calcium, potassium, and magnesium that wood ash supplies to the soil, wood ash also improves soil tilth. Wood ash has also proven to be a cost-effective alternative to agricultural lime, especially in rural areas where access to commercial agricultural lime is limited. Some of the challenges identified in the review of case studies include lengthy application approvals in some jurisdictions; weather-related issues associated with delivery, storage, and application of wood ash; maintaining consistent ash quality; inaccurate assessment of required ash testing; potential increased equipment maintenance; and misconceptions on the part of some farmers and government agencies regarding the effect and efficacy of wood ash on soil quality and crop productivity.
Ecodesign of Paper and Board Products, a Key Issue for Producing High Quality Recycled Pulp, 2003 Fall Technical Conference
Ecodesign of Paper and Board Products, a Key Issue for Producing High Quality Recycled Pulp, 2003 Fall Technical Conference
A Decision-Making Tool for Optimizing Pulp and Paper Mill Operations, 2003 Fall Technical Conference
A Decision-Making Tool for Optimizing Pulp and Paper Mill Operations, 2003 Fall Technical Conference
Enhanced Equipment Reliablity Through Precision Lubrication In The Pulp Mill, 2003 Fall Technical Conference
Enhanced Equipment Reliablity Through Precision Lubrication In The Pulp Mill, 2003 Fall Technical Conference
Synthesis of Pulping Processes With Fiber Loading Methods for Lightweight Papers, 2003 Fall Technical Conference
Synthesis of Pulping Processes With Fiber Loading Methods for Lightweight Papers, 2003 Fall Technical Conference
Oxalic Acid Pretreatment for Mechanical Pulping Greatly Improves Paper Strength while Maintaining Scattering Power and Reducing Shives and Triglycerides, 2003 Fall Technical Conference
Oxalic Acid Pretreatment for Mechanical Pulping Greatly Improves Paper Strength while Maintaining Scattering Power and Reducing Shives and Triglycerides, 2003 Fall Technical Conference