PYROLYSIS OF ISOCHRYSIS MICROALGAE WITH METAL OXIDE CATALYSTS FOR BIO-OIL PRODUCTION

Authors : TEVFİK AYSU

Pages : 395-414

Doi:10.18596/jotcsa.287338

View : 7 | Download : 4

Publication Date : 2017-01-09

Article Type : Research Paper

Abstract :Pyrolysis of Isochrysis microalgae was carried out in a fixed-bed reactor without and with metal oxide catalysts insert ignore into journalissuearticles values(CeO 2 , TiO 2 , Al 2 O 3 ); at the temperatures of 450, 500 and 550 o C with a constant heating rate of 40 o C/min. The pyrolysis conditions including catalyst and temperature were studied in terms of their effects on the yields of pyrolysis products and quality. The amount of bio-char, bio-oil and gas products was calculated. The composition of the produced bio-oils was determined by Elemental analysis insert ignore into journalissuearticles values(EA);, Fourier transform infrared spectroscopy insert ignore into journalissuearticles values(FT-IR);, proton nuclear magnetic resonance insert ignore into journalissuearticles values( 1 H NMR); and Gas chromatography/mass spectrometry insert ignore into journalissuearticles values(GC–MS); techniques. As a result of the pyrolysis experiments, it is shown that there have been significant effects of both catalyst and temperature on the conversion of Isochrysis microalgae into solid, liquid insert ignore into journalissuearticles values(bio-oil); and gas products. The highest bio-oil yield insert ignore into journalissuearticles values(24.30 %); including aqueous phase was obtained in the presence of TiO 2 insert ignore into journalissuearticles values(50%); as catalyst at 500 °C. 98 different compounds were identified by GC-MS in bio-oils obtained at 500 o C. According to 1 H NMR analysis, bio-oils contained ∼60-64 % aliphatic and ∼17-19 % aromatic structural units. EA showed that the bio-oils contained ∼66-69 % C and having 31-34 MJ/kg higher heating values.
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