摘要
在转鼓反应器中实现了油酸臭氧氧化裂解制备壬二酸的连续化操作。考察了转鼓转速、液体流量、气体流量对转鼓反应器内气液传质反应速率的影响。在双膜理论的基础上,利用恩田公式来计算气相传质系数、液相传质系数,建立了转鼓反应器中两步反应速率模型,并将模型预测值与实验值进行了比较。实验结果表明:在转鼓反应器中,油酸氧化裂解反应速率分别随转鼓转速和液体流量的增大,先增大后趋于平缓;随着气体通量的增加,转鼓反应器内油酸氧化裂解反应速率先增大然后减小;在转鼓转速为1 699 r/min、液体流量为45 mL/min、气体流量为3 L/min时,在转鼓内油酸氧化裂解可获得最大的气液传质反应速率。模型预测值与实验值比较,两者吻合得较好,验证了模型的可靠性。
In this study, the continuous production of azelaic acid by ozonolysis of oleic acid was achieved in ro- tor - drum reactor. The effects of rotationl speed,liquid flow and gas flow on the rate of gas - liquid mass transfer re- action in the rotating drum reactor were investigated. Furthermore, using Onda model to obtain gas phase transfer coef- ficient and liquid phase transfer coefficient, a model based on film theory was built to predict the two - step reaction rate in rotor- drum reactor. A comparison between the experimental data and the results calculated by the proposed model was done. The results showed： the reaction rate of azelaic acid by ozonolysis of oleic acid increases with the in- crease of rotationl speed and liquid flow initially, and then tends to be smooth. The reaction rate in the rotating drum reactor exists the maximum value with the increase of the gas flow. The reaction rate is Maximum when the rotationl speed of the drum surface is 1 699 r/min,the liquid flow is 45 mL/min and the gas flow is 3 L/rain respectively. Mo- reover, the results calculated had a good agreement with the experimental results, which achieved the verification of the proposed model.
出处
《化工时刊》
CAS
2014年第5期4-8,共5页
Chemical Industry Times
基金
浙江省科技厅创新团队项目(2009R50012)
关键词
油酸
臭氧
转鼓反应器
气液传质
模型
oleic acid ozone rotating drum reactor mass transfer and reaction model
