Research progress and hot spots of hydrothermal liquefaction for bio-oil production based on bibliometric analysis

Hydrothermal liquefaction (HTL) of biomass used HTL reaction under high temperature and pressure to produce bio-oil. This technology is considered as one of the most promising converting technology of biomass to biofuels. This paper summarized current research developments of HTL for bio-oil and ana...

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Bibliographic Details
Published in:Environmental science and pollution research international 2021-02, Vol.28 (7), p.7621-7635
Main Authors: Yang, Jian, Hong, Chen, Xing, Yi, Zheng, Zixuan, Li, Zaixing, Zhao, Xiumei, Qi, Chenhao
Format: Article
Language:English
Subjects:
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Bibliometrics
Biofuels
Biomass
Catalysts
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Food
Food waste
High temperature
Liquefaction
Oil
Organic wastes
Plant Oils
Polyphenols
Raw materials
Reaction mechanisms
Refuse Disposal
Review Article
Sludge
Temperature
Waste Water Technology
Water
Water Management
Water Pollution Control
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Summary:Hydrothermal liquefaction (HTL) of biomass used HTL reaction under high temperature and pressure to produce bio-oil. This technology is considered as one of the most promising converting technology of biomass to biofuels. This paper summarized current research developments of HTL for bio-oil and analyzed its reaction mechanism and influencing factors based on bibliometric analysis. The results showed that reaction conditions and catalyst have been still global researching focuses about HTL. Compared with homogeneous catalysts, the study of HTL by using heterogeneous catalyst developed more quickly. With promotion of resource recovering, food waste, sludge, and other organic waste can also be used as raw materials for HTL for bio-oil now. Graphical abstract The structure of this paper was shown in graphic abstract. Firstly, bibliometric analysis was conducted on hydrothermal liquefaction for bio-oil production. According to the emergency frequency of key words, catalyst, microalgae, reaction conditions, and biomass waste as raw material for hydrothermal liquefaction were determined as four parts of the paper. Finally, we speculated the development trend of hydrothermal liquefaction for bio-oil production.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-020-11942-2