TY - JOUR
T1 - Biocrude Upgrading in Different Solvents after Microalgae Hydrothermal Liquefaction
AU - Xu, Donghai
AU - Wei, Ning
AU - Liang, Yu
AU - Wang, Han
AU - Liu, Liang
AU - Wang, Shuzhong
N1 - Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/6/2
Y1 - 2021/6/2
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/85108108691
U2 - 10.1021/acs.iecr.1c00145
DO - 10.1021/acs.iecr.1c00145
M3 - 文章
AN - SCOPUS:85108108691
SN - 0888-5885
VL - 60
SP - 7966
EP - 7974
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 21
ER -