Varila, T., Brännström, H., Kilpeläinen, P., Hellström, J., Romar, H., Nurmi, J., and Lassi, U. (2020) From Norway spruce bark to carbon foams : characterization, and applications. BioResources 15(2), 3651-3666. doi:10.15376/biores.15.2.3651-3666
From Norway spruce bark to carbon foams : characterization, and applications
|Author:||Varila, Toni1,2; Brännström, Hanna3; Kilpeläinen, Petri4;|
1Research Unit of Sustainable Chemistry, University of Oulu, P.O. Box 8000, FI-90014, Finland
2Applied Chemistry, University of Jyvaskylä, Kokkola University Consortium Chydenius, P.O. Box 567, FI-67101 Kokkola, Finland
3Natural Resources Institute Finland (Luke), Teknologiakatu 7, FI-67100 Kokkola, Finland
4Natural Resources Institute Finland (Luke), Tietotie 2, 02150 Espoo, Finland
5Natural Resources Institute Finland (Luke), Humppilantie 7, FI-31600 Jokioinen, Finland
|Online Access:||PDF Full Text (PDF, 0.8 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2020052639148
North Carolina State University,
|Publish Date:|| 2020-05-26
Fresh bark from spruce Picea abies was milled and extracted with hot water. The extracts were purified in a number of steps in order to get tannin-extracts pure enough to prepare tannin-based carbon foams. The chemical composition of the extracts were analyzed. The foams were maturated and thermally treated to obtain desired properties, such as specific surface area, porosity, and compressive strength. It was possible to produce carbon foams even if they contained carbohydrate impurities. Differences in the properties of the carbon foams such as compressive strength, specific surface areas, and pore size distributions might be related to the compositions of the extracts. The foams were finally activated chemically and physically and were tested in adsorption of methylene blue. Results from the adsorption tests showed that adsorption was highly related to the total pore volume and the amount of mesopores created inside the foam structure during the thermal treatment.
|Pages:||3651 - 3666|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
116 Chemical sciences
Toni Varila would like to thank the Green Bioraff Solutions Project (EU/Interreg/Botnia-Atlantica, 20201508) for funding this research. Authors from Natural Resources Institute Finland gratefully acknowledge financial support from EU/Interreg/Botnia-Atlantica within the framework of Tannins for wastewater treatment (TanWat) project (20201484).
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