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How can I find some data on inorganic substances in Aspen?

2010-03-04View Original

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How can I find some data on inorganic substances in Aspen? For example, how do you find the Wilson interaction parameter for water and sulfuric acid?
Reply #22010-03-04
Select component water and sulfuric acid, then choose WILSON as the property method; the relevant Wilson interaction parameters can be found in Properties/Parameters/Binary Interaction/WILSON-1
Reply #32010-03-04
Water and sulfuric acid should be treated using the electrolyte method, rather than Wilson’s method
Reply #42010-03-05
I tried the method on the second floor, but it didn’t give me the desired result
Reply #52010-03-05
I tried the electrolyte method, but it didn’t work either
Reply #62010-03-05
Thermodynamic methods are mainly models that describe the thermodynamic properties of substances. Different models should be chosen for different problems; this analogy may not be entirely appropriate. For example, when studying the concentration of dilute nitric acid and using distillation, I think either the Wilson model or other binary interaction models can be used. As for the parameters of these models, they are in principle obtained through experiments. The accuracy of a model is determined by both the experimental regression parameters and the form of the model itself. The parameters provided by Aspen are also obtained through experimental regression. If the methods mentioned above don’t work, one has to consult literature or conduct experiments. However, when studying the exothermic reaction involved in the dissolution of nitric acid in water, the above models are not suitable, as this exothermic effect is primarily due to the breaking and formation of chemical bonds (mainly ionic bonds), which requires the use of electrolyte-based models. I have previously calculated the heat of dissolution of sulfuric acid, but I wasn’t sure whether it was accurate... In short, in my opinion, Aspen mainly provides us with mathematical models for each unit operation as well as some property data (although not complete, it’s much more than what other software offers)... Please point out any mistakes I might have made

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