The hydrothermal liquefaction (HTL) of As enriched Pteris vittata L. (PVL, hyper-accumulator biomass) was performed with the recycled aqueous phase as reaction medium, aiming to dispose the biomass with high water content and produce high-quality bio-oil. After three times of aqueous phase recycling at 275 °C, 30 min, the bio-oil yield increased to 30.32% from 21.54% and the higher heating value (HHV, 28.51 MJ/kg) of the bio-oil was higher than that of the bio-oil from HTL with pure water (26.80 MJ/kg). The main compounds detected in bio-oils were phenols, ketones, hydrocarbons, and aldehydes. Acetic acid (17.21–24.77 mg/mL) was dominant in the aqueous phases, resulting in the low pH (4.31–4.89). The heavy metals (Cu, Pb, Zn, Cd) mainly remained in bio-char whereas As was transferred to aqueous phase. Thus, HTL by aqueous phase recycling could be a promising way for PVL treatment to obtain high-quality bio-oil and arsenic recovery.
Bibliographical noteFunding Information:
The authors acknowledge the financial support from the National Key Research and Development Program of China (Grant No. 2017YFD0800900), ?Thousand Young Talents? Program of China, National Natural Science Foundation of China (No. 51906096), ?Thousand Talents? Entrepreneurship Program of Jiangxi Province.
The authors acknowledge the financial support from the National Key Research and Development Program of China (Grant No. 2017YFD0800900 ), “Thousand Young Talents” Program of China, National Natural Science Foundation of China (No. 51906096 ), “Thousand Talents” Entrepreneurship Program of Jiangxi Province.
- Aqueous phase recycling
- Heavy metals distribution
- Hydrothermal liquefaction
- Hyper-accumulator biomass
PubMed: MeSH publication types
- Journal Article