Project partners: Södra

3D nanotomography of wood fibres

Typically imaging of wood cells by 3D nanotomography is performed with the help of TEM or cryo TEM. To get a proper transmission signal, samples should be cut down to 100 nm thickness or even less. In this project we want to avoid extreme sectioning of wood pieces where observation area includes only a part …

3D nanotomography of wood fibres Läs mer »

Efficient Washing of Paper grade pulp in the kraft process

The project contributes to strengthened Swedish competitiveness through its expected research results and new fundamental knowledge for the development of an efficient pulp washing process and thus through an increased pace of innovation in the transition to a circular economy. After pulping the wood chips, the resulting pulp fibres and cooking liquor are separated in a …

Efficient Washing of Paper grade pulp in the kraft process Läs mer »

The kinetics of lignin extraction in oxygen delignification.

The current and future environmental challenges call for improved and more sustainable processes in the pulp industry. To contribute to a sustainable and competitive Swedish bioeconomy the pulp industry needs to increase efficiency without increasing the use of hazardous chemicals. Oxygen delignification is a unit process that has been used in pulp mill fiberlines between …

The kinetics of lignin extraction in oxygen delignification. Läs mer »

Multi scale modeling of the delignification kinetics during kraft cooking

The kraft process is today the dominant industrial technology for the production of pulp from wood.In this process, wood chips are boiled with chemicals in order to dissolve lignin, hemicellulose andextractives. The process itself contains several complex mass transport mechanisms, where thechemicals are to be transported into the wood chip and then further into the …

Multi scale modeling of the delignification kinetics during kraft cooking Läs mer »

Methodologies providing new insights into the fundamentals of the pulping process

Today’s knowledge of what happens concerning the kinetics and other phenomena in the digester during the pulping process is mainly the result of the use of inductive methods. Based on these methods, generalised models have been formulated that are applied for process development as well as for industrial process optimisation.  Recent studies (e.g., Mattsson et …

Methodologies providing new insights into the fundamentals of the pulping process Läs mer »

Nanocellulose based filaments for advanced applications. In situ SAXS studies of wood delignification.

To develop and characterize filaments for advanced applications, i.e. green smart textiles or conductive fibers. Use a flow-focusing setup and cellulose nanofibers as a main material for preparation of filaments with high mechanical performance. To understand  the fundamentals behind alignment and particle organization. To study impact of hydrolysis and delignification of wood chips on their structure …

Nanocellulose based filaments for advanced applications. In situ SAXS studies of wood delignification. Läs mer »

Adsorption av funktionella polymerer tillcellulosa i blekningssteget – ett sätt att utöka fibrernas egenskaper

The purpose of this proposed project is to suggest new pathways for the adsorption reactions to cellulose fibers in the bleaching step in the kraft pulp process. The long-term aim is to develop a flexible knowledge platform that can be used for designing functionalized surfaces of the cellulose fibers in the bleaching step, using by …

Adsorption av funktionella polymerer tillcellulosa i blekningssteget – ett sätt att utöka fibrernas egenskaper Läs mer »