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The objective of this work was to study bio-oil production from sugar cane trash by a pyrolysis process in fluidized bed reactor. The experiments were carried out at different temperatures ranging from 460 -540 o C and at different medium gas flow rates between 120 -160 cc.s -1 . Two different gases, Nitrogen (N 2 ) and air, were used as the fluidizing medium in order to study the effect of a different medium on the yield and properties of the bio-oil. The experimental result showed that the maximum bio-oil yields of 46.2 wt% and 31.95 wt% were obtained at 500 o C and 160 cc.s -1 for air and Nitrogen medium, respectively. The bio-oil yield obtained when using air as a medium was higher than that when using Nitrogen medium. This was a result of the higher quantity of water content in the air. The properties of bio-oil were determined and the result showed that its heating value, dynamic viscosity, density, water content, and pH were 15.48 MJ.kg -1 , 2.31 cSt 1,019 kg.m -3 , 52 wt% and 3, respectively. By dehydration of the obtained bio-oil, the heating value, viscosity and density were increased to 19.81 MJ.kg -1 , 57.66 cSt and 1,260 kg.m -3 , respectively. These results show that the bio-oil can be used as a fuel oil for combustion in a boiler or a furnace without any modification. Furthermore, the energy consumption of the pyrolysis process was analyzed.

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