Help: Regarding the selection of physical property methods
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It is necessary to extract the propyl components from hydrocarbons using water; several different methods were tried, such as SRK, SRKKD, RK-SOAVE, etc., but it was found that none of them could extract the propyl components. I’m not sure if the material property method chosen was inappropriate. After checking the binary interaction parameters, if there are no such parameters for water and propylene after selecting a certain property method, does that mean the simulation results indicate that propylene cannot be washed out? Finally, it was attempted to find that using UNIQ-RK with the binary interaction parameter for propanol and water would enable extraction, but it was stated that this method is not applicable to this system. I’m completely confused at the moment; I hope you can offer some guidance.
Could you be more specific? I’ve done some research and found that NRTL, UNIFAC, UNIQUAC, VANLAAR, and WILSON are all activity coefficient equations. If that’s the case, then choosing UNIQ-RK should be fine, right?
NRTL, UNIQUAC
No errors were reported, and the results converged, but it’s still not possible to remove it; Bingtong is still present in the raw material. I also tried the NRTL and UNIQUAC methods, and the results were good; however, a colleague with experience in working with PROII told me that since alkane and olefin components make up 99.99% of the feedstock, these two methods are not suitable for such systems. Since I am not yet very familiar with material properties, I would like to ask what method should be used for this type of feed component.