Problem Statement

Do Acid Gas Fluid Packages support high concentrations of H2SO4?
 

Solution

Unfortunately, in Aspen HYSYS the Acid Gas fluid package can only treat H2SO4 as a trace component to model the effect of heat stable salts, so its concentration should be low (usually hundreds to thousands ppmw). High concentrations of sulfuric acid are not supported for this property package.

If the user wants to simulate the process at those concentrations there are three workarounds:

1.- Model it in Aspen Plus as shown in the following article Is it possible to model a sulfuric acid process?, use the Electrolyte NRTL as the property package and use the chemistry tool to generate all the neutralization reactions as shown in the following article How to model electrolytes and salts in Aspen Plus

If the user wants to keep working in Aspen HYSYS, please select one of these options:

2.- Perform all the properties and reactions inside Aspen Plus based on the first comment, export it to Aspen HYSYS as shown in the following article How do I import a fluid package from Aspen Properties or Aspen Plus files in to Aspen HYSYS?

3.- Use an OLI property package that allows to simulate electrolyte systems and the reactions but it will require an additional license but you have to purchase the "engine" from OLI Systems as mentioned in the following article Do I need a license to access the OLI Electrolyte property package?

Keywords

H2SO4. Acid Gas, High, Concentrations