Thermochemical Catalytic Liquefaction of the Cyanobacteria from Dianchi Lake in Sub- and Supercritical Ethanol, and Properties of Bio-oil
滇池蓝藻在亚/超临界乙醇中热化学催化液化制备生物油及其特性

Direct liquefaction of the cyanobacteria from Dianchi Lake in ethanol under the sub-and supercritical conditions was carried out in an autoclave.The influences of reaction temperature,reaction time,catalyst loading,ratio of cyanobacteria to ethanol on the liquefaction were investigated.The results show that the optimal conditions are reaction temperature 270℃,reaction time 40 min,concentration of catalyst SO42-/ZrO2 2%,ratio of cyanobacteria to ethanol 1:15 g/mL.Under these conditions,the liquefaction conversion rate reaches 87.46% and the yield of bio-oil is 63.32%.The analysis by FT-IR and GC-MS indicates that the bio-oil is a complex mixture with palm ethyl as the main constituent.