Bio-oil from hydro-liquefaction of Dunaliella salina over Ni/REHY catalyst

Bioresour Technol. 2011 Mar;102(6):4580-4. doi: 10.1016/j.biortech.2010.12.111. Epub 2011 Jan 5.

Abstract

The hydro-liquefaction of Dunaliella salina over solid acid catalyst was examined under moderate conditions (200°C, 2.0 MPa, 60 min). The significant increment of bio-oil yield was obtained over Ni/REHY catalyst, increasing about 20% compared without modified REHY. H(2)-temperature-programmed desorption (H(2)-TPD) and X-ray powder diffraction (XRD) demonstrated that Ni/REHY as bifunctional catalyst played roles in hydrogenation and cracking, and further achieved the deoxygenation and desulfurization of D. salina under hydrogen gas. The oxygen and sulfur contents of bio-oils decreased relative to D. salina, and the higher heating value (HHV) significantly increased to 30.11 MJ/kg. From gas chromatography/mass spectrometry (GC/MS), the dominant compounds of the bio-oils were found to be esters, glycerins. The qualities of bio-oils were greatly improved. Hydro-liquefaction was beneficial to the exploration of bio-oils from microalgae.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Absorption
  • Biotechnology / methods*
  • Catalysis
  • Elements
  • Microalgae / metabolism*
  • Nickel / chemistry*
  • Plant Oils / chemical synthesis*
  • Spectroscopy, Fourier Transform Infrared
  • Temperature
  • Thermogravimetry
  • Zeolites / chemistry*

Substances

  • Elements
  • Plant Oils
  • Zeolites
  • Nickel