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Oxygen delignification and effects on pulp properties

Oxygen delignification has the potential to modify fiber properties, resulting in improved product properties

Cooking and oxygen delignification
Photo: Cláudia Esteves

Kraft pulping and oxygen delignification are important unit processes in production of pulp and paper. Oxygen delignification has the potential to modify fiber properties, resulting in improved product properties. Due to the oxidation of lignin and some carbohydrates, it is possible to increase the amount of charges present in the fibers. Higher charges lead to an increase in swelling and, consequently, to a better fiber conformation and bonding. A pulp entering the oxygen stage with higher kappa number from the cooking process, will decrease the cooking energy and the higher amount of charges reduces the refining energy needed to achieve the same or even higher mechanical strength.

PhD student Cláudia Esteves

 

Summary

Project name

Oxygen delignification

Status

Active

RISE role in project

PhD student and project leader

Project start

Duration

t o m 2023

Funders

STFI's intressentförening

Supports the UN sustainability goals

9. Industry, innovation and infrastructure
Elisabet Brännvall

Contact person

Elisabet Brännvall

Projektledare

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Claudia Esteves

Contact person

Claudia Esteves

Doktorand

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