Cited by 188Thermochemical Biomass Conversion ProcessesBiodiesel Production and ApplicationsAlgal biology and biofuel production

Machine learning prediction and optimization of bio-oil production from hydrothermal liquefaction of algae

Zhang, Weijin, Li, Jie, Liu, Tonggui, Leng, Songqi, Yang, Lihong, Peng, Haoyi, Jiang, Shaojian, Zhou, Wenguang +2 more·2021·Bioresource Technology

Abstract

Hydrothermal liquefaction (HTL) of algae is a promising biofuel production technology. However, it is always difficult and time-consuming to identify the best optimal conditions of HTL for different algae by the conventional experimental study. Therefore, machine learning (ML) algorithms were applied to predict and optimize bio-oil production with algae compositions and HTL conditions as inputs, and bio-oil yield (Yield_oil), and the contents of oxygen (O_oil) and nitrogen (N_oil) in bio-oil as outputs. Results indicated that gradient boosting regression (GBR, average test R 2 ∼ 0.90) exhibited better performance than random forest (RF) for both single and multi-target tasks prediction. Furthermore, the model-based interpretation suggested that the relative importance of operating conditions (temperature and residence time) was higher than algae characteristics for the three targets. Moreover, ML-based reverse and forward optimizations were implemented with experimental verifications. The verifications were acceptable, showing great potential of ML-aided HTL for producing desirable bio-oil.

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Crossref · 10.1016/j.biortech.2021.126011

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Authors
Zhang, W., Li, J., Liu, T., Leng, S., Yang, L., Peng, H., Jiang, S., Zhou, W., Leng, L., & Li, H.
Affiliations
  • Central South University (CN)
  • National University of Singapore (SG)
  • Nanchang University (CN)
Corresponding author
Leng, Lijian
Venue
Bioresource Technology
Publisher
Elsevier BV
Published
2021-12
Volume
342
Pages
126011
ISSN
0960-8524 (ISSN-L)
OpenAlex
W3200060725
Cited by
188
References
42
Citations by year
2026: 39 · 2025: 36 · 2024: 39 · 2023: 41 · 2022: 30 · 2021: 3
FWCI
8.58
Type
journal article
Language
en
Open access
closed
Locations
  • Bioresource Technology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (51808278)
  • National Key Research and Development Program of China
  • National Key Research and Development Program of China Stem Cell and Translational Research (2021YFE0104900)
Topics
  • Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
  • Physical Sciences › Engineering › Biomedical Engineering › Biodiesel Production and Applications
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
Keywords
hydrothermal liquefaction, algae, bio-oil production, machine learning prediction, gradient boosting regression, random forest, multi-target regression, process optimization, inverse optimization, operating conditions
MeSH terms
Machine Learning, Plant Oils, Temperature, Water, Biomass, Biofuels, Polyphenols

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