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Vapor-Liquid Equilibrium and Seperation Process of Ethylene Glycoland 1,2-Butanediol Mixture

Author: ZhuLianTian
Tutor: XiaoWenDe
School: Shanghai Jiaotong University
Course: Chemical Engineering and Technology
Keywords: Glycol 1,2 - butanediol Vapor-liquid equilibrium Distillation AspenPlus
CLC: O642.42
Type: Master's thesis
Year: 2012
Downloads: 58
Quote: 0
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Abstract


Of ethylene glycol from coal or natural gas via oxalate system is an important alternative to the route of the oil production of bulk chemicals . The syngas glycol Directions from CO coupling synthesis of dimethyl oxalate (DMO), DMO Catalytic Hydrogenation . Dimethyl oxalate hydrogenation process of ethylene glycol due to excessive hydrogenation byproducts , 1,2 - butanediol. Lack of existing literature design separation process needs glycol and 1,2 - butanediol vapor-liquid equilibrium of the underlying data . This topic using improved Ellis vapor-liquid equilibrium still glycol -1 ,2 - butanediol binary system under atmospheric pressure vapor-liquid equilibrium data were measured using a dynamic circulation method , in accordance with the of Herington rules on experimental data to verify the results show that the experimental The data are consistent with the thermodynamic consistency . Of thermodynamics associated the experimental data AspenPlus software , get the Wilson model and the NRTL model parameters , and to predict the azeotrope composition of the binary system . The maximum relative deviation of the vapor composition calculated Wilson model fitting parameters into the model equation of Wilson and NRTL model equations and experimental value were 0.89% and 0.74 % , 0.19% and 0.18% on average , fitting results ideal. Atmospheric pressure azeotrope composition EG47.0% 1,2 - butanediol 53.0% total boiling temperature 465.91K . Provide reference data for the design of industrial separation processes . Application AspenPlus chemical software simulation , the the excessive oxalate hydrogenation of ethylene glycol and its byproduct of the separation process of the simulation . For the separation of 1,2 - butanediol and ethylene glycol , to take a reasonable number of plates and to increase the reflux ratio can be completed separation task , bottoms product for the mass concentration 0.999 glycol , the overhead for EG and 1 , 2-BDO azeotrope . Separation of azeotropic distillation of the mixture of the top preliminary entrainer screening , to provide a reference for further study .

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical thermodynamics, thermochemistry, thermodynamic equilibrium > Thermodynamic equilibrium > Phase Equilibria
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