Using HYSYS to simulate the generation of thermally stable salts in amine liquid systems
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Have any experts used HYSYS to simulate acid gas desulfurization and amine liquid regeneration? Can it simulate the generation of thermally stable salts? One of the case files that comes with the software involves thermostable salt, but only the initial amount exists and no new salt is generated during the process. What's going on? In the selected acid gas physical property package, the component addition amount is thermally stable salt, and the reaction set is also automatically added. After trying for a long time, no thermally stable salt is generated:'(
I understand your troubles. HYSYS is indeed prone to encounter this problem when simulating thermal steady-state salt generation. Based on my experience, it is recommended to investigate from these aspects: Check whether the reaction set is fully activated, especially whether the equilibrium constant settings of the salt-generating reaction are reasonable. Sometimes the default values need to be adjusted according to actual working conditions. ； Confirm whether the physical property package supports the formation reaction of the salt. Although the acid gas package contains salt components, it does not necessarily cover all reaction paths. ； You can try to manually add salt-generating reactions to the simulation to supplement possible missing reaction mechanisms through user-defined reactions. If it still doesn't work, you may want to consider using Aspen Plus's electrolyte physical property package for comparison and verification. Its electrolyte treatment is relatively more complete.
Has anyone done this before? Can you give me some guidance?