两步法精制生物柴油工艺流程模拟  

Simulation of two-step process for refining biodiesel

作　　者：张旗 郝小红[1] 索航 杜肃 ZHANG Qi;HAO Xiaohong;SUO Hang;DU Su(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《中国油脂》2022年第1期75-80,106,共7页China Oils and Fats

摘　　要：以油酸和三油酸甘油酯混合物(酸值(KOH)42.52 mg/g)为原料,利用两步法生产精制生物柴油。采用Aspen Plus V10软件对整个工艺流程进行模拟,先以超声辅助低共熔溶剂酶法制备粗生物柴油,再以乙醇、甘油等为携带剂精馏分离游离脂肪酸,并对精馏工艺进行优化。结果表明:制备粗生物柴油过程中油酸和三油酸甘油酯转化率分别为88.19%与92.71%,粗生物柴油酸值(KOH)为5.07 mg/g;最佳精馏工艺条件为压力0.9 MPa、回流比0.7、理论塔板数31、粗生物柴油进料为第14块塔板、携带剂进料为第2块塔板,在此条件下精制生物柴油酸值(KOH)降至0.36 mg/g,精馏得率为95.27%。A two-step process was developed to refine biodiesel with oleic acid(C;H;O;) and triolein(C;H;O;) mixture(acid value 42.52 mgKOH/g). The whole process was simulated by Aspen Plus V10. Firstly, crude biodiesel was prepared by ultrasound-assisted deep eutectic solvent enzymatic method, and then free fatty acids were separated by distillation with ethanol and glycerol as carrier agent, and the distillation process was optimized. The results showed that the conversion rates of oleic acid and triolein were 88.19% and 92.71% respectively, and the acid value of crude biodiesel was 5.07 mgKOH/g. The optimal distillation process conditions were obtained as follows: pressure 0.9 MPa, reflux ratio 0.7, theoretical tray number 31, crude biodiesel feed from the 14 th tray and carrier agent feed from the second tray. Under the optimal conditions, the acid value of refined biodiesel reduced to 0.36 mgKOH/g, and the yield of distillation was 95.27%.

关 键 词：生物柴油 流程模拟 精制 酶法工艺 

分 类 号：TE667[石油与天然气工程—油气加工工程] TQ028[化学工程]