University of Oulu

Siipola, V., Tamminen, T., Källi, A., Lahti, R., Romar, H., Rasa, K., Keskinen, R., Hyväluoma, J., Hannula, M., Wikberg, H. (2018) Effects of biomass type, carbonization process, and activation method on the properties of bio-based activated carbons. BioResources, 13 (3), 5976-6002. doi:10.15376/biores.13.3.5976-6002

Effects of biomass type, carbonization process, and activation method on the properties of bio-based activated carbons

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Author: Siipola, Virpi1; Tamminen, Tarja1; Källi, Anssi1;
Organizations: 1VTT Technical Research Centre of Finland Ltd.
2University of Oulu, Research Unit of Sustainable Chemistry
3Natural Resources Institute Finland (Luke)
4BioMediTech Institute and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.1 MB)
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Language: English
Published: North Carolina State University, 2018
Publish Date: 2018-08-10


Activated carbons (AC) serve as adsorbents in various applications requiring specific functionalities. In this study, the effects of biomass type, pre-carbonization process, and activation method on the properties of ACs were investigated. Chemical (KOH and H₃PO₄) and physical (CO₂) activations were performed on slow pyrolyzed and hydrothermally carbonized (HTC) biochars produced from two feedstocks, willow and Scots pine bark (SPB). In addition, the adsorption capacities of the ACs were tested with two dyes and zinc metal. Distinct differences were found between the biochars and ACs regarding pore size distributions, surface area (238–3505 m² g⁻¹), and surface chemistry. KOH activation produced highly microporous ACs from all biochars, whereas with H₃PO₄ and CO₂ there was also increase in the meso- and macroporosity with the HTC biochars. Adsorption capacity for dyes was dependent on the surface area, while for zinc it depended on AC’s pH. The results provide interesting insights into tailoring ACs for specific applications.

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Series: Bioresources
ISSN: 1930-2126
ISSN-E: 1930-2126
ISSN-L: 1930-2126
Volume: 13
Issue: 3
Pages: 5976 - 6002
DOI: 10.15376/biores.13.3.5976-6002
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Funding: This project has received funding from the European Union's Horizon 2020 Research and Innovation Programme under grant agreement No 637020-MOBILE FLIP.
Copyright information: BioResources follows an open-access policy of publication. Research articles, scholarly reviews, and editorial items accepted for publication by BioResources will be made available for viewing and downlaod, without restriction and without charge, to users of the Internet. Such users are entitled to fair use of the material for research and educational purposes, but they do not have permission to publish or to sell the material or to quote it without attribution. The author(s) retain rights to use the submitted and published material without restriction.