Catalytic hydroprocessing of fast pyrolysis bio-oil from Chlorella

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• 作者：Wei-cheng ZHONG ; Qing-jie GUO ; Xu-yun WANG ; Liang ZHANG
• 关键词：chlorella ; pyrolysis oil ; catalytic hydroprocessing ; Ni-Co-Pd/¦Ã-Al2O3 catalyst ; reaction mechanism
• 刊名：Journal of Fuel Chemistry and Technology
• 出版年：2013
• 出版时间：May, 2013
• 年：2013
• 卷：41
• 期：5
• 页码：571-578
• 全文大小：2678 K

文摘

Catalytic hydroprocessing of the bio-oil obtained through fast pyrolysis of Chlorella was carried out in a bench-scale continuous-flow fixed-bed reactor equipped with a Ni-Co-Pd/¦Ã-Al₂O₃ catalyst. The effects of the hydrogenation temperature and the H/oil molar ratio on the moisture content, calorific value, viscosity and cetane number of the refined bio-oils were investigated at the pressure of 2¡Á10⁶ Pa, It was shown that the yield of the refined oil reached 89.6 % , and the calorific value and cetane number were increased by 17.94 % and 71.2 % respectively, while the viscosity was decreased by 66.32 % at the temperature of 300¡ãC, the pressure of 2¡Á10⁶ Pa and the H/oil molar ratio of 120. The elemental analysis and GC-MS analysis results of the bio-oil before and after hydrogenation show that the H/C atomic ratio was increased from 1.55 to 1.97, while the oxygen, nitrogen and sulfur contents were significantly decreased. The deoxidation degree reached 80.46 % . The amounts of organic acids, esters, ketones and aldehyde in the refined oils were obviously decreased, while those of alcohols and alkanes were markedly increased.