4.7 Review

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

Journal

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 28, Issue 7, Pages 7621-7635

Publisher

SPRINGER HEIDELBERG
DOI: 10.1007/s11356-020-11942-2

Keywords

Bibliometric analysis; Hydrothermal liquefaction; Bio-oil; Catalyst

Funding

  1. National High-Level Talent Special Support Plan [ZYZZ2018001]
  2. Key R&D Program of HeBei Province [19273809D]
  3. Fundamental Research Funds for the Central Universities [FRF-TP-18-006C1]
  4. Beijing Training Project for the Leading Talents in ST [LJ201620]

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The research findings indicate that the focus of HTL technology lies in the selection of reaction conditions and catalysts. Compared with homogeneous catalysts, the study of HTL using heterogeneous catalysts has progressed more rapidly. By promoting resource recovery, organic waste such as food waste and sludge can now be used as raw materials for HTL for bio-oil.
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.

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