Pelletization of biochar from hydrothermally carbonized wood
Abstract
Abstract Hydrothermal carbonization (HTC) is a pretreatment process for making a homogenized, carbon rich, and energy dense solid fuel, called biochar, from underutilized lignocellulosic biomass. Compared to raw biomass, HTC biochar is both more hydrophobic for better storage and more friable for better processing. In this pretreatment method, the biomass is treated with hot compressed water in the temperature range of 200–260°C. Hemicelluloses and water extractives react very quickly compared to cellulose. Lignin is relatively inert, resulting in a biochar with increased lignin content. Lignin acts as a binder for pelletization of pretreated lignocellulosic biomass. A hydraulic press with a controllable heated die was used for pelletization studies. The materials used to make pellets were raw loblolly pine and pine pretreated at different temperatures. The presence of solid bridges was observed in both raw pine pellets and HTC biochar pellets. Pellets made from HTC biochar exhibit favorable properties, including increased hydrophobicity, abrasion resistance, energy density, and mass density compared to pellets produced from raw pine or from dry torrefied pine. Pellets produced from biomass pretreated at 260°C have a volumetric fuel value 70% greater than pellets produced from untreated pine (38.8 MJ/m 3 vs. 22.8 GJ/m 3 ), a mass density of 1468 kg/m 3 , and a higher heating value of 26.4 MJ/kg. © 2012 American Institute of Chemical Engineers Environ Prog, 2012
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Due to increase in lignin or decrease in hemicellulose content, hydrophobicity of HTC residue increases, thereby shelf life of HTC residue would be increased without any biodegradation.
“Due to the increase in the lignin or decrease in the hemicellulose content, the hydrophobicity of the HTC residue increases, thereby the shelf life of the HTC residue would be increased without any biodegradation [85,107].”
From Hydrochar: A Review on Its Production Technologies and Applications (2021) · cites this paper as [107]
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- Authors
- Reza, M. T., Lynam, J. G., Vasquez, V. R., & Coronella, C. J.
- Affiliations
- University of Nevada, Reno (US)
- Corresponding author
- Coronella, Charles J.
- Venue
- Environmental Progress & Sustainable Energy
- Publisher
- Wiley
- Published
- 2012-02-29
- Volume
- 31
- Issue
- 2
- Pages
- 225-234
- ISSN
- 1944-7442 (ISSN-L)
- 1944-7450
- OpenAlex
- W2039176038
- Cited by
- 186
- References
- 27
- Citations by year
- 2026: 7 · 2025: 9 · 2024: 13 · 2023: 10 · 2022: 13 · 2021: 21 · 2020: 17 · 2019: 19 · 2018: 12 · 2017: 11 · 2016: 8 · 2015: 12 · 2014: 22 · 2013: 7 · 2012: 5
- FWCI
- 8.38
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Environmental Progress & Sustainable Energy (publishedVersion)
- Funders
- U.S. Department of Energy
- Desert Research Institute
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
- Physical Sciences › Engineering › Mechanics of Materials › Forest Biomass Utilization and Management
- Life Sciences › Agricultural and Biological Sciences › Forestry › Agricultural and Food Sciences
- Keywords
- hydrothermal carbonization, biochar, pelletization, lignocellulosic biomass, Pinus taeda, torrefaction, lignin, hydrophobicity, energy density, solid fuels, hydraulic pressing, biomass pretreatment
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