固定化细胞磁稳定流化床反应器制备生物柴油

为了探索生物酶法制备生物柴油新工艺，克服现有工艺的不足，采用超顺磁性全细胞催化剂在自制的磁稳定流化床中对废油脂连续生产生物柴油进行了试验研究。考察了改变磁场强度、进料醇油摩尔比、催化剂用量及流量等因素对连续酯交换反应的影响，进而得到单级磁流化床酯交换反应的最佳工艺条件：磁稳态操作，醇油摩尔比为1∶1，催化剂用量为原料油质量的12%，进料流量为42.6?mL/min。四级磁流化床连续系统最终转酯化率达到85%以上，连续反应200 h后四级出口的甲酯产率仍在80%以上。这说明全细胞催化剂在磁稳定流化床中活性较高，使用寿命较长，该系统具有良好的操作稳定性。

Biodiesel production in magnetically stabilized fluidized bed reactor by whole-cell bio-catalyst

An experimental study of biodiesel production in a self-made magnetically fluidized bed by superparamagnetic whole-cell catalyst was conducted. By changing the magnetic field strength, methanol to oil molar ratio, catalyst concentration, flow rate and other factors, effects of different factors on the continuous transesterification reaction had been found. The optimized factors of single-stage fluidized bed catalytic transesterification of waste oil were using magnetic steady-state operation, methanol to oil molar ratio of 1:1, quantity of catalyst with 12% of oil and the feed rate of 42.6 mL/min. The final methyl ester production rate of the four-stage continuous magnetically fluidized bed reactor system was over 85%. Even after 200 h continuous operation, the production rate of the forth export was more than 80 %.The results showed that the whole-cell catalyst in the magnetically fluidized bed had high activity and long service life, the system had a good operational stability.