Thermodynamic simulation of the circulating hydrogen desulfurization tower
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What thermodynamics is used for simulating the destruction of gasoline via hydrodesulfurization? I tried using the NRTL approach and it managed to converge, but there’s a problem: the hydrogen sulfide concentration in the exhaust gases is actually higher than that at the inlet!
This has little to do with thermodynamics; it depends on how your reaction is set up
Reply to 2# robinbird: I have used the Sour algorithm, and indeed there is no significant difference; how are the settings for the response in PROii handled?
There must be a hydrogenation reactor in your process; take a look at how the reactions are set up there. In hydrodesulfurization, my understanding is that the organic sulfur present in gasoline first needs to be converted into hydrogen sulfide through hydrogenation; as a result, the amount of hydrogen sulfide at the reactor outlet increases, and then this H2S is removed.