Property estimation problem
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I would like to ask the experts here: I have two questions regarding property estimation, as follows. Please give me some advice. Thank you! 1. SOLUBILITY PARAMETER DELTA 61704.8421 (J/CUM)**.5 DEFINITION: How should this solubility parameter be understood? 2. ** An error occurs: the physical property value MUV for the component H2O cannot be estimated using the REICHENB method as specified, due to missing input parameters: STRUCTUR. ** An error occurs: the physical property value MUV for the component CO cannot be estimated using the REICHENB method as specified, due to missing input parameters: STRUCTUR. ** An error occurs: the physical property value MUV for the component CO2 cannot be estimated using the REICHENB method as specified, due to missing input parameters: STRUCTUR. The structure for the component SODIU-01 has not been defined. PCES cannot use group-contribution methods to estimate the missing properties; use the STRUCTURE section to define the structures for this component. How can these errors be resolved? I am performing MUV estimations for H2O, CO, CO2, and NaOH.
I hope the original poster can post the more complete key screens of ASPEN PLUS for downloading, to facilitate everyone’s analysis of the issues. Thank you!
H2O, CO and CO2, H2S are already available in the property databases; why is it necessary to estimate them?
Yes, the ASPEN data for the physical properties of this material system is quite accurate. Why estimate them? It seems that the person who performed the calculations didn’t use the electron method, which is why the results obtained are not accurate. The electrolyte method should be used, and then Co can be assigned to the Henry component; the accuracy should be very high
4# dawnchuck Thank you all for your suggestions. I want to learn how to estimate physical properties, but it seems that the methods used don’t yield results for certain substances