声明
摘要
ABSTRACT
Contents
Nomenclature
Chapter 1 Introduction
1．1 Research background
1．2 Method for separating ethanol／water azeotrope system
1．2．1 Membrane process
1．2．2 Chemical dehydration process
1．2．3 Azeotropic distillation process
1．2．4 Vacuum distillation process
1．2．5 Adsorption process
1．2．6 Salt extractive distillation process
1．2．7 Solar distillation process
1．2．8 Conventional extractive distillation method
1．3 Ionic liquids
1．3．1 Historical background
1．3．2 Definition and properties of ILs
1．4 Applications of ILs in azeotropic separation
1．4．1 Experimental progress of ILs in the separation of azeotropic mixture
1．4．2 Simulation of ILs for azeotropic separation in extractive distillation
1．5 Introduction to Aspen Plus
1．5．1 Material and energy balance equations
1．5．2 Equation of state
1．6 Unit operation models in Aspen Plus
1．6．1 Columns
1．6．2 Separators
1．6．3 Heat exchangers
1．6．4 Pressure changers
1．7 Thermodynamic model
1．7．1 NRTL model
1．7．2 UNIQUAC Model
1．7．3 UNIFAC Model
1．7．4 COSMO-SAC thermodynamic model
1．8 Research objectives and proposal
Chapter 2 Thermodynamic model (COSMO-SAC) for ethanol dehydration by ILs
2．1 Introduction
2．2 COSMO-SAC model accuracy
2．3 COSMO-SAC model equations
2．4 ILUAM enterprise databank for COSMO-SAC model
2．5 Thermodynamic parameters and values of ILs
2．5．1 Sigma profile of ethanol+water+ILs in COSMO-SAC model
2．5．2 Heat capacity and vapor pressure
2．5．3 Critieal values of ILs
2．6 Summary
Chapter 3 Process simulation for separation of ethanol and water mixture by using [Bmim] BF4 and [Emim] BF4
3．1 Introduction
3．2．1 Selection of ethanol water system components
3．2．2 Equipment selection in Aspen plus for ethanol dehydration
3．3 Aspen plus simulation validation
3．4 Initial parameters for ethanol dehydration process
3．5 Process flow diagram
3．6 Simulation analysis and discussion
3．6．1 Feed position effect on ethanol purity
3．6．2 Effect solvent feeding position on ethanol purity
3．6．3 Effect of theoretical number of trays on ethanol purity
3．6．4 Effect of Solvent to Feed Ratio (S／F) on ethanol purity
3．6．5 Effect of solvent temperature on ethanol purity
3．6．6 Effect of molar reflux ratio on ethanol purity
3．6．7 Effect of distillate rate on ethanol purity
3．6．8 Effect of S／F ratio on reboiler duty
3．7 Parameters feasibility of extractive distillation column
3．7．1 Temperature profile in extraction distillation column
3．7．2 Composition profile of liquid-vapor phase in extractive distillation column
3．8 Optimization of flash tank for ILs regeneration
3．9 Simulation results and discussion
3．10 Summary
Chapter 4 Comparison between [Bmim] BF4 and [Emim] BF4 in ethanol dehydration process
4．1 Energy consumption analysis
4．2 Efficiency comparison between [Bmim] BF4 and [Emim] BF4
4．2．1 Ethanol purity
4．2．2 Water removal
4．3 Comparison with industrial solvents
4．3．1 Energy comparison
4．3．2 Ethanol purity comparison
4．3．3 Solvent regeneration comparison
4．4 Summary
Chapter 5 Conclusion
References
Appendix
Acknowledgements
List of Publications
Resume of the Author
Resume of the Supervisor
