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Investigation to biodiesel production by the two-step homogeneous base-catalyzed transesterification
- Ye, Jianchu, Tu, Song, Sha, Yong
- Bioresource technology 2010 v.101 no.19 pp. 7368-7374
- biodiesel, distillation, energy, equipment, methanol, models, sunflower oil, traditional technology, transesterification
- For the two-step transesterification biodiesel production made from the sunflower oil, based on the kinetics model of the homogeneous base-catalyzed transesterification and the liquid-liquid phase equilibrium of the transesterification product, the total methanol/oil mole ratio, the total reaction time, and the split ratios of methanol and reaction time between the two reactors in the stage of the two-step reaction are determined quantitatively. In consideration of the transesterification intermediate product, both the traditional distillation separation process and the improved separation process of the two-step reaction product are investigated in detail by means of the rigorous process simulation. In comparison with the traditional distillation process, the improved separation process of the two-step reaction product has distinct advantage in the energy duty and equipment requirement due to replacement of the costly methanol-biodiesel distillation column.