280341 Process Intensification in Ethylene Oxide Production: Optimal Reactor Design From a Process Point of View

Tuesday, October 30, 2012: 1:14 PM
Oakmont (Omni )
Hannsjörg Freund1, Andreas Peschel2 and Kai Sundmacher2,3, (1)Chemical Reaction Engineering, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany, (2)Process Systems Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, Germany, (3)Process Systems Engineering, Otto-von-Guericke University Magdeburg, Magdeburg, Germany

In this work, a new method for the identification of the best reaction concept from an overall process point of view is proposed. Using this method the optimal reaction route is determined independently of existing apparatuses and the recycle affecting the reactor is fully considered. The reaction concept and the design parameters of the process are simultaneously optimized. For this purpose, a detailed model of the reaction system including reaction kinetics, thermodynamic relationships, and intrinsic bounds such as explosion limits as well as a complete model of the downstream process is set up. The potential of different reaction concepts including innovative process intensification alternatives can easily be determined by comparison with an optimized reference case.

The example considered in this work is the oxygen based ethylene oxide process, which is one of the most important chemical bulk processes. Sophisticated cooling in combination with distributed oxygen dosing is identified as best technical reaction concept with a significant potential of reducing the running expenses compared to an optimized reference case. In addition, the utility consumption (e.g. the consumption of electricity) can be drastically reduced.

In conclusion, the proposed method enables the predictive determination of the best reaction concept from an overall process point of view taking the full interconnections between the reaction concept and the process into account and considering highly innovative process intensification options. Thereby, this method provides a key stone for the development of more economical and more sustainable chemical reactors and processes of the future.

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See more of this Session: Process Design for Process Intensification
See more of this Group/Topical: Process Development Division