Thermodynamic And Kinetic Studies And Vent-sizing Calculations Of The Acetic Anhydride Esterification By Methanol

The chemical industry has brought great convenience for the humans' daily life.However,it has brought many disasters as well because of many safety problems.Main causes of these disasters are that the designers don't manage the thermodynamics and kinetics of these reactions and therefore can't design a safer process flow.The acetic anhydride esterification by methanol is a common reaction which is widely used when producing acetic acid and methyl acetate in non-water condition.In order to provide convenience for the lab-scale research and industrial design,this thesis systematically studied the thermodynamic and kinetic behaviors of this reaction.This thesis obtained the heat of reactions and the adiabatic temperature rise by the RC1 e in isothermal mode,and fitted the second-order kinetic model.For saving the high calorimetry cost,this thesis provided a method-Group Contribution Method to get the reaction heats and corrected the estimation results in detail.To obtain the kinetic behaviors in adiabatic conditions,this thesis also conducted an ARC adiabatic calorimetry experiment,got the reaction heat and the adiabatic temperature rise,and fitted the second-order kinetic models.All results are similar with the RC1 e experiment.Afterwards,the thesis adopted the Leung-Omega method to calculate the safety vent area,which can help the industrial production to conduct vent sizing.To increase efficiency,decrease the errors,and leave out the complicated iteration and equation solving,this thesis developed a program based on Excel which can estimate the reaction heat and calculate the vent sizing.The main purpose of the whole thesis is how to obtain the thermodynamic and kinetic behaviors of acetic anhydride esterification by methanol efficiently and accurately,and provide help for the lab research and industrial design.