Progress in Hydrothermal Liquefaction of Algal Biomass and Hydrothermal Upgrading of the Subsequent Crude Bio-Oil: A Mini Review
Abstract
Algae biomass has recently attracted the attention of the green energy industry as a raw material for biofuels production. Their high-water content has led to the choice of hydrothermal liquefaction as a suitable way to convert them into bio-oil. From algae species to bio-oil as fuel, many steps are required, including the selection of algae species and process parameters (including catalysts), the liquefaction process, product separation, recovery of crude bio-oil, and subsequent upgrading (if the goal is to use the bio-oil as transportation fuel). This review gives some biochemical, elemental, and inorganic compositions of algae. The reaction mechanism of hydrothermal liquefaction is briefly described, with an emphasis on the influence of process parameters on the yield and quality of the crude bio-oil. The use of organic solvents as reaction media or for recovery of crude bio-oil from product mixtures is discussed. The research work on the catalytic hydrothermal upgrading of algae liquefied crude bio-oil in recent years is reviewed, and some conclusions are put forward. According to recent reports, there is a section devoted to the techno-economic analysis of the hydrothermal liquefaction process. Finally, the challenges that future research and new development strategies may face are proposed.
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Three major steps have been identified in HTL: depolymerisation, decomposition, and recombination.
“Three major steps have been identified: depolymerisation, decomposition, and recombination [104].”
From Key Targets for Improving Algal Biofuel Production (2021) · cites this paper as [104]
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- Authors
- Djandja, O. S., Wang, Z., Chen, L., Qin, L., Wang, F., Xu, Y., & Duan, P.
- Affiliations
- Xi'an Jiaotong University (CN)
- Gansu Yinguang Chemical Industry Group Co., Ltd., Baiyin, Gansu 730900, P.R. China
- Henan Polytechnic University (CN)
- College of Chemistry and Chemical Engineering, Department of Energy and Chemical Engineering, Henan Polytechnic University, No. 2001, Century Avenue, Jiaozuo, Henan 454003, P.R. China
- Corresponding author
- Duan, Peigao
- Venue
- Energy & Fuels
- Publisher
- American Chemical Society (ACS)
- Published
- 2020-09-21
- Volume
- 34
- Issue
- 10
- Pages
- 11723-11751
- ISSN
- 0887-0624 (ISSN-L)
- 1520-5029
- OpenAlex
- W3087945097
- Cited by
- 93
- References
- 129
- Citations by year
- 2026: 7 · 2025: 9 · 2024: 12 · 2023: 19 · 2022: 28 · 2021: 17 · 2020: 1
- FWCI
- 5.10
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Energy & Fuels (publishedVersion)
- Funders
- National Natural Science Foundation of China (21776063, U1704127)
- Scientific and Technological Innovation Team of the University of Henan Province (18IRTSTHN010)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
- Physical Sciences › Engineering › Mechanical Engineering › Catalysis and Hydrodesulfurization Studies
- Keywords
- hydrothermal liquefaction, algal biomass, bio-oil upgrading, catalytic upgrading, process parameters, organic solvents, reaction mechanism, techno-economic analysis, algal biofuels
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