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Journal articles
Magazine articles
TAPPI News, Paper360º January/February 2021

TAPPI News, Paper360º January/February 2021

Journal articles
Magazine articles
Open Access
Addressing production bottlenecks and brownstock washer optimization via a membrane concentration system, TAPPI Journal July 2021

ABSTRACT: Advancements in membrane systems indicate that they will soon be robust enough to concentrate weak black liquor. To date, the economic impact of membrane systems on brownstock washing in kraft mills has not been studied and is necessary to understand the viability of these emerging systems and their best utilization.This study investigated the savings that a membrane system can generate related to brownstock washing. We found that evaporation costs are the primary barrier for mills seeking to increase wash water usage. Without these additional evaporation costs, we showed that our hypothetical 1000 tons/day bleached and brown pulp mills can achieve annual savings of over $1.0 MM when operating at higher dilution factors and fixed pulp production rate. We then investigated the impact of increasing pulp production on mills limited by their equipment. In washer-limited mill examples, we calculated that membrane systems can reduce the annual operating cost for a 7% production increase by 91%. Similarly, in evaporator-limited mill examples, membrane systems can reduce the annual operating cost for a 7% production increase by 86%. These results indicated that membrane systems make a production increase significantly more feasible for these equipment-limited mills.

Journal articles
Magazine articles
TAPPI Journal Summaries,Paper360º July/August 2021

TAPPI Journal Summaries,Paper360º July/August 2021

Journal articles
Magazine articles
Open Access
New learnings and strategies for meeting future recovery boiler particulate emission limits with existing electrostatic precipitators, TAPPI Journal June 2021

ABSTRACT: It is foreseeable that recovery boiler particulate emission limits in the United States and Canada will continue to get more stringent with time. Because of this, continued improvement of emission control equipment, as well as a better understanding of how operating parameters affect performance, are necessary. Although electrostatic precipitators (ESPs) are often viewed as a mature technology, many improvements in ESP technology continue to be developed. In recent years, academic efforts have improved the understanding of recovery boiler operating conditions on ESP performance. Additionally, advancements in materials, power supplies, and design continue to improve the efficiency and reliability of ESPs.This paper discusses how recovery boiler and electrostatic precipitator (ESP) operating factors affect ESP perfor-mance based on process simulations and practical experience, and how these learnings can be implemented to improve future operation of existing ESPs.

Journal articles
Magazine articles
The Future of Sustainability at Pulp and Paper Mills, Paper360º November/December 2021

The Future of Sustainability at Pulp and Paper Mills, Paper360º November/December 2021

Journal articles
Magazine articles
Open Access
Tetraethyl orthosilicate-containing dispersion coating — water vapor and liquid water barrier properties, TAPPI Journal September 2021

ABSTRACT: An aqueous styrene-butadiene latex dispersion coating containing in-situ processed tetraethyl orthosilicate (TEOS) applied on paperboard demonstrated improved water barrier performance. Coatings containing TEOS equivalent to 0.8% silicon dioxide (SiO2; dry basis) exhibited water vapor performance of < 25 g/m2/day (23°C, 50% relative humidity [RH]) and liquid water barrier performance Cobb 1800 s of < 6 g/m2, when applied as a single-layer 18 g/m2 coating. Cobb 1800 s barrier performance was still good (< 11 g/m2) at coat weights of 7•10 g/m2. The use of filler materials such as kaolin improved the vapor barrier properties of the coating, but this was not critical to the liquid water barrier properties.

Journal articles
Linkages between residual lignin and carbohydrates in bisulphite (magnefite)pulps, Journal of Pulp and Paper Science, September 2001, Vol. 27(9)

Linkages between residual lignin and carbohydrates in bisulphite (magnefite)pulps, Journal of Pulp and Paper Science, September 2001, Vol. 27(9)

Journal articles
NETWORKING: Sticks and stones break more than bones, SOLUTIONS! [01SEPSO72.pdf]

Sticks and stones break more than bones, Solutions!, September 2001, Vol. 1(1)

Journal articles
MANAGEMENT FOCUS: Engineering in the Age of Optimization [01SEPSO68.pdf]

Engineering in the age of optimization, Solutions!, September 2001, Vol. 1(1)

Journal articles
LAST WORD: New and coming attractions [01SEPSO120.pdf]

New and coming attractions, Solutions!, September 2001, Vol. 1(1)

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