How to simulate the removal of H2S to elemental S using a catalyst
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We are working on a desulfurization design, and we have chosen to use tannin + 888 as a dual catalyst to convert H2S into elemental S for desulfurization. We are currently using Aspen for simulation, but we’re not sure which module to use for this purpose. Radfrac should be used for absorption, but it’s not possible to achieve the formation of S through this process. Even when specifying the desired reaction outcome in the reactor model, no S is generated; there might be an error somewhere. Additionally, we’re unsure which property method to choose – ELECNRTL lacks binary interaction parameters, and the electrolyte wizard also fails to produce a reaction that results in S formation. We’re very frustrated at the moment and hope that experts can help us resolve this issue. Thank you very much
If kinetics are involved, use an RPLUG plug-flow reactor; if no kinetics are involved, use a conversion-rate reactor. This reaction does not seem to involve electrolytes, and the reaction equation must be specified by the user. Kinetic reactors have their parameters defined within the reaction section, while conversion-rate reactors have those parameters defined within the reactor module itself.
Thank you for the explanation. But there is one issue: when formulating this reaction equation, almost nothing is known about the kinetic factors involved – things like activation energy and pre-exponential factors are unknown, as is the driving force behind the reaction. I was wondering where or in what literature these parameters can be found. Although the gum method is widely used, its kinetic studies seem to still be incomplete
I’m not sure about that; foreign literature might cover it somewhat
Well, there’s nothing else to do then. Maybe some factors can be specified using parameters from similar existing equations? After all, this is just a major assignment for the chemical engineering design course:P
Then use a conversion rate reactor instead first; why is kinetics added again?
But it’s strange; I still can’t carry out the reaction using the conversion rate reactor… It says that there’s a lack of reaction enthalpy and Anthony parameters or something like that, and that’s why it can’t proceed (′-ι_-｀)