Characterization and utilization of aqueous products from hydrothermal conversion of biomass for bio-oil and hydro-char production: A review

Muhammad Usman, Huihui Chen, Kaifei Chen, Shuang Ren, James H. Clark, Jiajun Fan, Gang Luo*, Shicheng Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Hydrothermal conversion (HTC), including hydrothermal liquefaction and hydrothermal carbonization, is a cost-effective and environmentally friendly thermochemical technology for the utilization of biomass. Bio-oil and hydro-char have been the subjects of intense research over the past decade, during which considerable amounts of aqueous products with high concentrations of organics and nutrients have been produced, which have been largely overlooked. Compositions of hydrothermal conversion aqueous products (HTC-AP) strongly depend on the process conditions and biomass compositions, and also affect their further utilization. The present study systematically summarizes the main reactions occurring in HTC, characterization of HTC-AP, and factors affecting the compositions of HTC-AP. More importantly, recent advances of HTC-AP utilization techniques are summarized. Finally, the main challenges for future research on HTC-AP have been identified and possible solutions are given.

Original languageEnglish
Pages (from-to)1553-1572
Number of pages20
JournalGreen Chemistry
Issue number7
Early online date1 Mar 2019
Publication statusPublished - 7 Apr 2019

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