Investigation the Effect of Agitation and Flow Rate in Three-Stage Continuous Stirred Tank Reactors Connected In Series for Ethyl Acetatesaponification Reaction

E.Y. Melesse¹ , S.W. Jima² , M.K. Gebremeariam³ , Z.B. Asrat⁴ , D.A. Gesese⁵ , A.A. Dubero⁶

Section:Research Paper, Product Type: Journal-Paper
Vol.8 , Issue.1 , pp.17-20, Feb-2021

Online published on Feb 28, 2021

Copyright © E.Y. Melesse, S.W. Jima, M.K. Gebremeariam, Z.B. Asrat, D.A. Gesese, A.A. Dubero . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
Investigation study of three-stage continuous stirred tank reactor for ethyl acetate hydrolysis reaction has been accompanied. Sodium hydroxide and Ethyl acetate were selected for reaction evaluation.The parameters evaluated for saponification reaction were flowrate (40ml/min,70 ml/min, and 100 ml/min), agitation rate (minimum, medium, and maximum), and temperature of non-isothermal conditions.Nine experimental performances were investigated and for all the experiments initial concentration of ethyl acetate and sodium hydroxide were constant. The NaOH(4%)and CH3COONA (6%) were used for the data recorded. The minimum conductivity values, the maximum temperatures, and conversion values of the reaction were 45.2%,66.34% at a temperature of 24.9 °C for R1,41.1%, 69.53%at a temperature of 24.5 for R2, and 40.7%, 69.76 % at the temperature of 24 ºC for R3for 40 ml/min flowrate and minimum agitation rate individually. Based on the medium agitation rate and medium flow rate (70ml/min)the minimum value of conductivity and maximum value of conversion was 38.3% and 71.59% obtained at a temperature of 27.1 °C of R1,30.5%, and 77.53% at a temperature of 27.5 °C of R2, 27.8% and 79.59% at a temperature of 26.8 °Cof R3 respectively.Compared to others the reactions operated at a maximum flow rate (100ml/min) and maximum agitation rate of the conductivity and conversion values were 43.1% and 67.94% of R1 at the temperature of 27.8 ºC,34.4 % and 74.56% R2, 34.1% and 74.79 % of R3 at the temperature of 28.3 °C. The three-stage CSTRs connected in series value of conductivity decreased accelerable, but the value of conversion increased progressively. The results gained in this evaluation may help optimize the production of desired products at a large level and predict the advantage of multiple-stage reactors connected in series extraappropriate for the saponificationreaction of ethyl acetate.

Key-Words / Index Term :
three-stage continuous stir tank reactors; saponification; conductivity; flow rate; conversion; agitation rate

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