Activated carbon from renewable resources: Carbonization, activation and use

Thesis event information

Date and time of the thesis defence

Place of the thesis defence

Kokkola University Consortium Chydenius, room Ulappa, Talonpojankatu 2B, Kokkola

Topic of the dissertation

Activated carbon from renewable resources: Carbonization, activation and use

Doctoral candidate

Master of Science (Eng.) Davide Bergna

Faculty and unit

University of Oulu Graduate School, Faculty of Technology, Research Unit of Sustainable Chemistry

Subject of study

Applied chemistry

Opponent

Associate Professor Yohannes Kiros, KTH Royal Institute of Technology, Sweden

Second opponent

- -

Custos

Professor Ulla Lassi, University of Oulu

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Activated carbon from domestic raw materials

The dissertation deals with the production of technical grade activated carbon from biomass. The dissertation investigates the production of activated carbon by slow thermal carbonization followed by physical or chemical activation.

The use of activated carbon of technical quality is increasing. Activated carbon is already the most commonly used chemical in water and gas purification. It is not produced in Finland and therefore, Finland is dependent on the import.

Activated carbon from domestic raw materials could replace imported carbon made from coconut shells or coal-based activated carbon, which is mainly used as a purification chemical in industry. In addition, high-quality technical carbon can be used, for example, in catalytic applications and in electronics.

The main results of the thesis are the properties of the materials used in the carbonization and their effects on the quality of the carbon products. In this work, a method for the carbonization and activation was developed and, based on an experimental study, a model was developed to optimize the properties (yield, specific surface area, micro- and mesoporosity) of the activated carbons produced.

The work also demonstrated a significant difference between a one-step and two-step carbonization and activation process. The study also investigated the use of activated carbon in water purification. Some of the produced carbons have been used and tested as a catalyst support.
Last updated: 22.11.2019