利用微波设备改进生物柴油生产工艺

用大豆油和甲醇为原料,K2O/Al2O3为催化剂,考察了微波辅助条件下醇油摩尔比、催化剂用量、反应时间、反应温度和微波功率对生物柴油转化率的影响。通过正交试验分析,得出了制备生物柴油的最适条件:甲醇与大豆油摩尔比13∶1,催化剂质量分数3.5%,反应温度为70℃,反应时间20 min,微波输出功率4.5 W/g,大豆油的平均转化率可达到94%以上。并比较了利用微波辅助设备制备生物柴油与传统工艺制备生物柴油的优势:达到90%以上的转化率前者仅需要30 min,而后者需要150 min。

Improvement of Biodiesel Production Process by Microwave Equipment

With the soybean oil and methanol as raw materials,K2O/Al2O3 as catalyst to examine the effects of alcohol mole ratio,catalyst dosage,reaction time,reaction temperature and microwave power on the recovery rate of biodiesel under the condition of microwave assisted.Through the orthogonal experiment analysis,obtained the optimum conditions of biodiesel preparation：methanol and soybean oil mole ratio was 13∶1,catalyst mass fraction was 3.5％,reaction temperature was 70 ℃,reaction time was 20 min,microwave output power was 4.5 W/g,under this condition the recovery rate of biodiesel could reach more than 94％.Compared the microwave auxiliary equipment with the traditional process preparation of biodiesel：reaching 90％ recovery rate,the former only needed 30 mins,while the latter took 150 mins.