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Abstract: Chlorella samples were pyrolysed in a fixed bed reactor with γ-Al_2O_3orZSM-5 molecular sieve catalyst at 600℃.Liquid oil samples was collected from pyrolysis experiments in a condenser and characterized for water content,kinematic viscosity and heating value.In the presence of catalysts,gas yield decreased and liquid yield increased when compared with non-catalytic pyrolysis at the same temperatures.Moreover,pyrolysis oil from catalytic with γ-Al_2O_3runs carries lower water content and lower viscosity and higher heating value.Comparison of two catalytic products,the results were showed that γ-Al_2O_3 has a higher activity than that of ZSM-5 molecular sieve.The acidity distribution in these samples has been measured by t.p.d,of ammonia,the γ-Al_2O_3 shows a lower acidity.The γ-Al_2O_3 catalyst shows promise for production of high-quality bio-oil from algae via the catalytic pyrolysis.
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