The system contains substances such as SO3, SO2, H2SO4, and H2O; which equation of state is more appropriate to use in HYSYS?
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Dear experts, I would like to ask: after simulating the combustion of sulfur-containing exhaust gases (with SO2, SO3, H2O, etc. in the flue gas), and during the process of rapid cooling with cooling water, the system contains SO3, SO2, H2SO4, H2O, etc. Which equation of state is more appropriate to use in HYSYS? I first tried using the PR equation, but the simulation process failed to work properly ； An extended NRTL was chosen later, and the calculations were completed, but it’s not clear whether this choice is appropriate. Thank you! ! !
Electrolytes are unlikely to be the factor here; when it comes to flue gas cooling, it’s not possible to cool the flue gas directly to below its dew point. Only in that case would one need to consider the dissolution reactions of SO3 and H2SO4 in water. My humble opinion