Bio-oil from hydro-liquefaction of Dunaliella salina over Ni/REHY catalyst.
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.
Department of Chemical Engineering and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China.
Chao
C
Yang
Lishan
L
Jia
Changping
C
Chen
Guangfa
G
Liu
Weiping
W
Fang
D000042:Absorption; D001709:Biotechnology / Q000379:methods*; D002384:Catalysis; D004602:Elements; D058086:Microalgae / Q000378:metabolism*; D009532:Nickel / Q000737:chemistry*; D010938:Plant Oils / Q000138:chemical synthesis*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013818:Thermogravimetry; D017641:Zeolites / Q000737:chemistry*
D004602:Elements; D010938:Plant Oils; D017641:Zeolites; D009532:Nickel