I have seen flowsheets like Ling&Luyben (2009), have been trying to simulate the dividing wall column but it doesn´t work. The mixture is bencene, toluene, o-xylene. Thanks in advance.
A divided wall column is the same as two columns side by side with a common reflux that can be modeled as a feed to the top of the tower
You can implement a DWC setup in, e.g., Aspen Plus by using 4 interconnected RadFrac models or the built-in MultiFrac model. Both methods are described in detail in the book by Luyben (2013, Distillation Design and Control Using Aspen Simulation). Nonetheless, I would recommend to build a model in an equation oriented environment of your choice since those highly integrated processes can be hard to converge by a sequential modular solution procedure. In an individual model, you can design a specific initialization procedure that fits your needs.
For more information on the general topic, I recommend the review by Waltermann and Skiborowski (2019, Conceptual Design of Highly Integrated Processes - Optimization of Dividing Wall Columns).
Nawal Azrou I have been trying in different simulators like aspen hysys but essentially I´m having trouble with convergence and maybe selecting the correct unit operations to simulate the DWC. Thanks for the answer Kai Kruber and Rick Manner , I´ll be reviewing my simulation with the corresponding information supplied
As Kai Kruber mentioned, you can use the MultiFrac model in Aspen Plus to design DWC. By using the MultiFrac model, you can integrate any number of columns you want. Usually, 2 columns will be sufficient (i.e Prefractionation and the Main Column) if it's a basic DWC.
Hari Kiran Tirumaladasu thank you, I have reviewed bibliography, at the moment I would like to use also RadFrac model in Aspen Plus to migrate it to dynamic and achieve control or maybe it is also possible with MultiFrac?
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