Continuous hydrothermal co-liquefaction of aspen wood and glycerol with water phase recirculation
Open accessAbstract
Hydrothermal liquefaction is a promising technology for the conversion of a wide range of bio-feedstock into a biocrude; a mixture of chemical compounds that holds the potential for a renewable production of chemicals and fuels. Most research in hydrothermal liquefaction is performed in batch type reactors, although a continuous and energy-efficient operation is paramount for such process to be feasible. In this work an experimental campaign in a continuous bench scale unit is presented. The campaign is based on glycerol-assisted hydrothermal liquefaction of aspen wood carried out with the presence of a homogeneous catalyst at supercritical water conditions, 400 ° C and 300 bar. Furthermore, in the experimental campaign a water phase recirculation step is incorporated to evaluate the technical feasibility of such procedure. In total, four batches of approximately 100 kg of feed each were processed successfully at steady state conditions without any observation of system malfunctioning. The biocrude obtained was characterized using several analytical methods to evaluate the feasibility of the process and the quality of the product. Results showed that a high quality biocrude was obtained having a higher heating value of 34.3 MJ/kg. The volatile fraction of the biocrude consisted mostly of compounds having number of carbon atoms in the C 6 –C 12 range similar to gasoline. In terms of process feasibility, it was revealed that total organic carbon (TOC) and ash significantly accumulated in the water phase when such is recirculated for the proceeding batch. After four batches the TOC and the ash mass fraction of the water phase were 136.2 [g/L] and 12.6 [%], respectively. Water phase recirculation showed a slight increase in the biocrude quality in terms on an effective hydrogen-to-carbon ratio, but it showed no effects on the product gas composition or the pH of the water phase. The successful operation demonstrated the technical feasibility of a continuous production of high quality biocrude.
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An average composition of the HTL gas is used based on data reported in literature for lignocellulosic feedstock.
“An average composition of the HTL gas is used as shown in Figure 2 based on data reported in literature for lignocellulosic feedstock [23,24].”
From Integration of hydrothermal liquefaction and carbon capture and storage for the production of advanced liquid biofuels with negative CO2 emissions (2020) · cites this paper as [24]
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“An average composition of the HTL gas is used as shown in Figure 2 based on data reported in literature for lignocellulosic feedstock [23,24].”
MethodSelf-citationJasiūnas, L., Pedersen, T. H., Toor, S. S., & Rosendahl, L. A. (2017) · Renewable Energy · doi:10.1016/j.renene.2017.04.019 · Cited by 59 · see citing works
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- Authors
- Pedersen, T. H., Grigoras, I. F., Hoffmann, J., Toor, S. S., Daraban, I. M., Jensen, C. U., Iversen, S. B., Madsen, R. B., Glasius, M., Arturi, K. R., Nielsen, R. P., Søgaard, E. G., & Rosendahl, L. A.
- Affiliations
- Aalborg University (DK)
- Aarhus University (DK)
- Corresponding author
- Rosendahl, L.A.
- ORCID
- Venue
- Applied Energy
- Publisher
- Elsevier BV
- Published
- 2016-01
- Volume
- 162
- Pages
- 1034-1041
- ISSN
- 0306-2619 (ISSN-L)
- OpenAlex
- W1853754616
- Cited by
- 222
- References
- 50
- Citations by year
- 2026: 13 · 2025: 22 · 2024: 15 · 2023: 16 · 2022: 20 · 2021: 35 · 2020: 24 · 2019: 22 · 2018: 19 · 2017: 23 · 2016: 13
- FWCI
- 9.12
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- www.elsevier.com/tdm/userlicense/1.0/ (tdm)
- www.elsevier.com/legal/tdmrep-license (tdm)
- www.elsevier.com/open-access/userlicense/1.0/ (am, 317 d)
- doi.org/10.15223/policy-017 (stm-asf)
- doi.org/10.15223/policy-037 (stm-asf)
- doi.org/10.15223/policy-012 (stm-asf)
- doi.org/10.15223/policy-029 (stm-asf)
- doi.org/10.15223/policy-004 (stm-asf)
- Locations
- Applied Energy (acceptedVersion)
- VBN Forskningsportal (Aalborg Universitet) (submittedVersion, cc-by-nc-nd)
- RePEc: Research Papers in Economics (submittedVersion)
- Funders
- Danish Agency for Science, Technology and Innovation (10-094552)
- Danish Council for Strategic Research (1305-00030B)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
- Physical Sciences › Engineering › Biomedical Engineering › Subcritical and Supercritical Water Processes
- Physical Sciences › Engineering › Mechanical Engineering › Catalysis and Hydrodesulfurization Studies
- Keywords
- hydrothermal liquefaction, aspen wood, glycerol, continuous process, biocrude, supercritical water, homogeneous catalysts, H/C ratio, process feasibility, ash accumulation, total organic carbon
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