Biocrude Upgrading in Different Solvents after Microalgae Hydrothermal Liquefaction

被引：0
|
作者：
Xu, Donghai [1 ]
Wei, Ning [1 ]
Liang, Yu [1 ]
Wang, Han [1 ]
Liu, Liang [1 ]
Wang, Shuzhong [1 ]
机构：
[1] Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'An Jiaotong University, Shaanxi Province, Xi'an,710049, China
来源：
Industrial and Engineering Chemistry Research | 2021年 / 60卷 / 21期
关键词：
Microalgae;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Hydrothermal liquefaction of the third-generation biomass represented by microalgae can produce biocrude. However, the directly obtained biocrude has a high heteroatom content and a low higher heating value (HHV), which cannot meet the standards of biofuel. In this work, water-insoluble biocrude which was directly gained from microalgae hydrothermal liquefaction (HTL) was upgraded under four kinds of solvents (i.e., methanol, ethanol, acetone, and H2O) and one type of catalyst (H2O + Ru/C) at 240-400 °C for 1 h. The results show that the HHV and C and H contents of upgraded bio-oil increased and the O/C ratio decreased significantly after solvent upgrading. The highest upgraded bio-oil yield appeared in the case of ethanol upgrading and reached the maximum value of 82.8 wt % at 360 °C. The upgraded bio-oil yield of acetone upgrading increased from 45.8 to 68.2 wt % as the temperature increased within 240-400 °C. Also, esterification reactions between alcohol and acid in the supercritical system remarkably reduced the content of carboxyl-containing organic matter. © 2021 American Chemical Society.
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页码：7966 / 7974
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