Pulp digester modeling
Research Project , 2018 – 2019

The goal is to develop 3-D mechanistic models for flow, reaction (delignification), mass- and heat transport, in pulp digesters. The models will be used for better design, operation and scale-up, and validated and evaluated at different scales. For example, the flows to obtain a desired product at lowest energy and operation cost and with the highest material yield, can be optimized. The project is divided into the highly connected subtasks: • Identify and quantify the distinct mechanistic transport/reaction steps for the penetration of digestion chemicals into the lignocellulosic structure and the dissolution of lignin • Flow model for the flow of cooking liquid through the material • Couple flow and transport/reaction models The project is planned as an industrial PhD in cooperation between Chemical Engineering at Chalmers and Valmet. A suitable PhD candidate, Sofia Evysdotter, is already employed at Valmet.


Anders Rasmuson (contact)

Full Professor at Chalmers, Chemistry and Chemical Engineering, Chemical Technology, Chemical Process and Reaction Engineering



Tampere, Finland


Swedish Energy Agency

Project ID: 45123-1
Funding Chalmers participation during 2018–2019

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