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Editorial: Research, conferences, and COVID-19, TAPPI Journal May 2021
ABSTRACT: While medical science in fields like virology blazed a path in 2020 in developing vaccines, diagnostic tests, and treatments to combat the COVID-19 pandemic, other scientific research slowed significantly.
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Impact and feasibility of a membrane pre-concentration step in kraft recovery, TAPPI Journal May 2021
ABSTRACT: Emerging robust membrane systems can perform the first section of black liquor (BL) concentration by separating clean water from the black liquor stream using only mechanical pressure. By doing so, they can reduce the steam and energy required for BL concentration. Because of the high osmotic pressure of strong BL, a membrane system would not replace evaporators but would operate in series, performing the first section of BL concentration. In this work, we use a multi-effect evaporator (MEE) model to quantify the steam and energy savings associated with installing membrane systems of different sizes. When maintaining a constant BL solids throughput, we find that a pulp mill could reduce steam usage in its evaporators by up to 65%. Alternatively, a membrane system could also serve to increase BL throughput of the recovery train. We find that a membrane system capable of concentrating BL to 25% could double the BL solids throughput of a mill’s evaporators at the same steam usage. We also demonstrate that installing a membrane system before an MEE would minimally affect key operating parameters such as steam pressures and BL solids concentrations in each effect. This indicates that installing a membrane pre-concentration system would be nonintrusive to a mill’s operations.
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2021 TAPPI/PIMA Awards: Rising to the Challenge, Paper360º May/June 2021
2021 TAPPI/PIMA Awards: Rising to the Challenge, Paper360º May/June 2021
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Success through Resilience, Paper360º May/June 2021
Success through Resilience, Paper360º May/June 2021Success through Resilience, Paper360º May/June 2021
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TAPPI Journal Summaries, Paper360º May/June 2021
TAPPI Journal Summaries, Paper360º May/June 2021
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RMM Part 4: Belief-Driven Strategy, Paper360º May/June 2021
RMM Part 4: Belief-Driven Strategy, Paper360º May/June 2021
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R&M TIP: GROUTING, Paper360º May/June 2021
R&M TIP: GROUTING, Paper360º May/June 2021
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How Has NA’s Tissue Business Weathered the Coronavirus Pandemic?, Paper360º May/June 2021
How Has NA’s Tissue Business Weathered the Coronavirus Pandemic?, Paper360º May/June 2021
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TAPPI News, Paper360º May/June 2021
TAPPI News, Paper360º May/June 2021
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ASPI News, Paper360º May/June 2021
ASPI News, Paper360º May/June 2021ASPI News, Paper360º May/June 2021