Hydrothermal liquefaction of microalgae in an ethanol-water Co-solvent to produce biocrude oil

Jixiang Zhang, Yuanhui Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, hydrothermal liquefaction (HTL) of microalgae Chlorella pyrenoidosa was conducted for biocrude oil production. The ethanol-water co-solvent was introduced to take advantage of the special properties of supercritical ethanol and hot compressed water. The effects of the ethanol/water mass ratio (R) on the product distribution and characterization were discussed. The co-solvent showed better performance over any constituent mono-solvent, indicating synergistic effects of ethanol and water. The highest biocrude oil yield of 57.3% and the lowest solid residue yield of 9.4% were achieved at R = 5:2. The loading factor was considered as another influencing factor under supercritical conditions. Furthermore, potential reaction pathways for major biomacromolecule monomers in the ethanol-water co-solvent were also proposed on the basis of the gas chromatography-mass spectrometry (GC-MS) analysis of the liquid products.

Original languageEnglish (US)
Pages (from-to)5178-5183
Number of pages6
JournalEnergy and Fuels
Volume28
Issue number8
DOIs
StatePublished - Aug 21 2014

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

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