From the results of ASPEN Plus simulation I came to know the Top four gases from the last RGIBBS reactor. Can I remove one gas separately from the reactor before the last one. How to deal with this ? As I just draw stream from the second last reactor its value become zero. But I know from the simulation result that gas value is not zero.
RGIBBS computes a thermodynamic equilibrium of allowed products and reactants. The product stream might be two phase liquid and vapor, depending on how much heat you add or remove.
Generally if you remove something before the reaction is finished, the equilibrium would be shifted. Many reactions are done this way intentionally to drive completion.
RGIBBS does not separate gas product components into separate streams even if they are produced separately in different stages of reaction. You have more than one reactor, You might simulate your process by adding additional reactors and gas or vapor separation operations between them.
Think of how it might be done in an operating plant, and model it that way.
Sir @ Jerry Decker then which kind of reactor can be used to remove one gas separately?
Dear Tahir,
Mr Jerry is right, if you remove any gas before the RGIBBS, it will not take part in the reaction. Another option is you can place one separator after the reactor for the gas separation. Try if it works.
Moreover, please explain the process so that it is understandable.
Regards,
Sir @Syed A.Taqvi Understood. Thanks a lot Jerry Decker and Syed A.Taqvi.
Sir @Syed A.Taqvi and @Jerry Decker is there any specific separator in Which I can define that this gas I need to remove separately from the top and the other gases from the bottom. As I tried FLASH separator I found that all gases went to the top and gases from the bottom shows all values zero. I also tried just Sep to separate the gases, One specific gas from the top and other three gases from the bottom but this need Design Specification I specified the flow and split friction but this still gives this error "Number of specifications must be equal to number of components for each substream " . Do you have ever dealt with this kind of issue?
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