Rate Based Modelling and Simulation Studies of Hybrid Processes consisting of Distillation, Vapour Permeation and Adsorption for the dehydration of ethanol

摘要

Detailed simulation studies with rigorous models for different hybrid processes consisting of distillation, vapour permeation and adsorption are presented in this paper. The application focuses on the separation of the non-ideal binary mixture ethanol/water. Membrane processes can be a promising alternative to conventional process technologies, due to its independence from the vapour liquid equilibrium. Two polymeric membranes with hydrophilic properties have been investigated and modelled with (semi-) empirical approaches. First analysis of a hybrid process consisting of distillation and vapour permeation demonstrates the high potential to cause an improvement for the ethanol production concerning yield and capacity. A process analysis illustrates the influence of operating and structure parameters on relevant target variables. The results should become the basis for a simultaneous optimization of a complete hybrid process.