University of Oulu

Koskela, A., Suopajärvi, H., Uusitalo, J., & Fabritius, T. (2023). Evolution of biocarbon strength and structure during gasification in CO2 containing gas atmosphere. Fuel Communications, 14, 100082.

Evolution of biocarbon strength and structure during gasification in CO₂ containing gas atmosphere

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Author: Koskela, Aki1; Suopajärvi, Hannu2; Uusitalo, Juha3;
Organizations: 1Process Metallurgy, Faculty of Technology, University of Oulu, Oulu, Finland
2Sapotech Oy, Oulu, Finland
3Materials and Mechanical Engineering, Faculty of Technology, University of Oulu, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 10.1 MB)
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Language: English
Published: Elsevier, 2023
Publish Date: 2023-05-10


This work focuses on the properties of hydrolysis lignin biocarbons with a perspective on utilizing the biocarbons in pyrometallurgical processes. Even if the blast furnace and basic oxygen furnace (BF-BOF) process route was replaced by emerging technologies with lower CO₂ emissions in the future, the need for carbonaceous materials in the iron and steel making industry will still exist. Most of these applications do not require as high standards for the properties of carbonaceous materials as BF but the requirements are still similar to those for BF. The most important properties of carbonaceous materials are the mechanical strength and suitable reactivity. In the case of biocarbon, the apparent density is also considered important. The reactivity and strength properties are investigated with isothermal reactivity tests and compression strength tests for the non-gasified and pre-gasified biocarbon and reference coke samples. The mass loss rate of coke gasification (-0.069%/min) was considerably lower than that of least reactive biocarbon L1200 (-0.18%/min). Regarding the compression strength of the samples, the strength of coke dropped by 56.44% for the samples of pre-gasification level of 50% compared to non-gasified samples while the drop was only 40.68% for the L1200 biocarbon samples. The level of gasification was found to have direct correlation with pore area percentage with R² value 0.92 in case of L1200 and 0.98 in case of coke. Further, the pore area percentage correlated with the compression strength with R²of 0.93 in case of L1200 and 0.98 in case of coke.

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Series: Fuel communications
ISSN: 2666-0520
ISSN-E: 2666-0520
ISSN-L: 2666-0520
Volume: 14
Article number: 100082
DOI: 10.1016/j.jfueco.2022.100082
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: The Carbotech project (project number A75548), funded by European Regional Development Fund (ERDF) is acknowledged by the authors of this paper.
Copyright information: © 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (