Problems encountered in simulating chemical engineering processes
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When using PRO-II for simulations, I found that it provides a good fit for the results of refinery units, converges relatively easily, and is also easy to align with actual field conditions. For chemical plants, especially those dealing with aqueous multipolar systems, the components in the PRO-II library seem to be insufficient for such cases, resulting in unreliable outcomes. Such as isopropanol, n-propanol, propylene, isopropyl ether, aqueous systems. Which expert has a more comprehensive understanding of the shortcomings of PRO-II? I would appreciate your advice. This post was last edited by KaiChuanDeFeng on 2008-2-4 08:50.]
I’m a beginner; when it comes to applying thermodynamic methods, I basically use the approaches recommended by others. I often don’t know what to do in cases involving water, and I’m not sure how to define algorithms and phases either.
I’m not sure what the problem is. I’ve been using ProII for less than a year, and I find its user interface to be unfriendly; the property data available isn’t comprehensive either. But overall, it’s still a decent process simulation software, with excellent usability, especially when it comes to data output. After joining AspenTech, I found that HYSYS had a much better user interface, while Aspen Plus offered even greater computing power; its range of functions was also superior to that of ProII. As a result, I never used ProII again, opting instead for HYSYS and Aspen Plus.
Thermodynamic selection may not be very appropriate; firstly, activity coefficients must be used in highly polar systems, and for systems containing water and alcohols, the Alcohol equation can be applied. Of course, it is best to have interaction parameters, so that the simulation results will be closer to the real situation.
How are interaction parameters used? I’ve been using a simulation for extractive distillation recently, and I often come across this term; I just don’t know how to use it. Could someone please give me some guidance, or provide some reference materials? Thank you!
The selection of thermodynamic methods is one aspect, while the choice of the parameter library for those methods is another; different parameter libraries contain various interaction parameters.