Department of Chemical Engineering, Alagappa College of Technology, Anna University, Chennai 600 025, India.
Bioresour Technol. 2013 Jan;128:392-400. doi: 10.1016/j.biortech.2012.10.068. Epub 2012 Oct 23.
In this investigation, Enteromorpha compressa algal oil with high free fatty acids (FFA) used as a feedstock for biodiesel production. Two step process was developed and kinetic study executed to obtain reaction rate constant for the transesterification reaction. The acid esterification was carried out to reduce FFA from 6.3% to 0.34% with optimized parameters of 1.5% H(2)SO(4), 12:1 methanol-oil ratio, 400 rpm at 60 °C and 90 min of reaction time. The maximum biodiesel yield 90.6% was achieved from base transesterification through optimum conditions of 1% NaOH, 9:1 methanol-oil ratio, 600 rpm and 60 °C temperature for 70 min. The algal biodiesel was characterized by GC-MS, HPLC and NIR. This transesterification follows first order reaction kinetics and the activation energy was determined as 73,154.89 J/mol. The biodiesel properties were analyzed and found to be within the limits of American standards. Hence, E. compressa serves as a valuable renewable raw-material for biodiesel production.
在这项研究中，使用高游离脂肪酸 (FFA) 的浒苔藻油作为生物柴油生产的原料。开发了两步法工艺，并进行了动力学研究以获得酯交换反应的速率常数。通过优化参数为 1.5% H(2)SO(4)、12:1 甲醇-油比、400 rpm 在 60°C 下反应 90 min，进行酸酯化反应将 FFA 从 6.3%降低至 0.34%。通过最佳条件 1% NaOH、9:1 甲醇-油比、600 rpm 和 60°C 温度下反应 70 min，从碱酯交换中获得了 90.6%的最大生物柴油产率。通过 GC-MS、HPLC 和 NIR 对藻类生物柴油进行了表征。该酯交换遵循一级反应动力学，确定的活化能为 73,154.89 J/mol。分析了生物柴油的性能，发现其在美标范围内。因此，浒苔可作为生物柴油生产的有价值的可再生原料。
