Water-soluble and -insoluble biocrude production from hydrothermal liquefaction of microalgae with catalyst

Hydrothermal liquefaction (HTL) of microalgae produces water-soluble biocrude (WSB) and water-insoluble biocrude (WISB) simultaneously. The effects of heterogeneous catalysts (i.e. Pt/C, Ru/C, Pt/C+Ru/C) on the properties of the two types of biocrudes from Chlorella HTL were explored herein for the...

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Bibliographic Details
Published in:Energy procedia 2019-01, Vol.158, p.97-102
Main Authors: Xu, Donghai, Guo, Shuwei, Liu, Liang, Wu, Zhiqiang, Wang, Yang, Lin, Guike
Format: Article
Language:English
Subjects:
heterogeneous catalyst
hydrothermal liquefaction
microalgae
water-insoluble biocrude
water-soluble biocrude
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Summary:Hydrothermal liquefaction (HTL) of microalgae produces water-soluble biocrude (WSB) and water-insoluble biocrude (WISB) simultaneously. The effects of heterogeneous catalysts (i.e. Pt/C, Ru/C, Pt/C+Ru/C) on the properties of the two types of biocrudes from Chlorella HTL were explored herein for the first time. The results show that Pt/C was favorable for the production of WISB, and reduced the WSB fraction in WSB+WISB, and obtained the highest C, H contents and the lowest N, O contents in WSB, and led to the highest yield (37.09 wt.%) and energy recovery (71.04%) of total biocrude (WSB+WISB). The WISB produced with Pt/C mainly consisted of amides (48.19%), hydrocarbons (17.68%), organic acids (12.78%), and phenols (7.74%). Pt/C prompted the cracking of high-molecular-weight compounds and the formation of low-boiling-point compounds.
ISSN:1876-6102
1876-6102
DOI:10.1016/j.egypro.2019.01.052