Aspen’s analysis of the hydrogen chloride system in water (hydrochloric acid) is far from accurate
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This post was last edited by mrzhouyi on 2019-9-7 09:43. Software: Aspen One V9. File: The system’s built-in file eh2ohc.bkp was opened. Result: The azeotrope could not be found； The TXY graph differs too much from the actual value. I seek advice from experts; looking forward to your response. 1. Components were inspected, and the results were normal. 2. Methods for checking physical properties, electrolyte method. 3. Checking the settings for Henry components, HCL. 4. Searching for azeotropes – but none found? ? ? 5. Set TXY to prepare for viewing the TXY graph. 6. The result is like this; it doesn’t match reality at all. Where is the mistake? The file is as follows:
Using Aspen’s built-in database to simulate electrolytes results in values that are significantly different from the actual values; I’ll need to find the relevant data again, import it, and then conduct the simulation
It’s difficult to collect the data, so the built-in database of Aspen is used; please provide the name of any website or book where this information can be found
mhcl.bkp H2O - HCL using SYSOP15M: I checked it, and the data is still usable; the azeotrope mass ratio is 20%.
It has been checked, and the results are fairly accurate compared to the actual situation. I changed the previous electrolyte method to apparent components, and the resulting accuracy was fairly good.
It has been checked, and the results are fairly accurate compared to the actual situation. I changed the previous electrolyte method to apparent components, and the resulting accuracy was fairly good.
I would like to ask how to change the previous electrolyte method to apparent components? Why was it changed to apparent components?
This is how I see it: The actual components are those that actually exist in the medium; for example, in an aqueous solution of HCl, the actual components are HCl, H2O, H3O+, Cl-, and OH-. The apparent components, on the other hand, are the components from a macroscopic perspective; again, in an aqueous solution of HCl, the apparent components are HCl and H2O
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Changing to a query of the macroscopic components using the TXY diagram is indeed the right approach. However, if the property-based methods remain unchanged and an Azeotrope Search is used, the azeotropic compositions still cannot be identified. Is there any way to solve this?