Has anyone on this forum conducted any research on reactive distillation using PRO/II?
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We can discuss this; I found that the reaction rate I calculated was much higher than that calculated by PRO/II, by several times. I used the MTBE example included in PRO/II as a reference. Thank you!
PROII is mainly used in petrochemical distillation; the reaction module is not its strength
How do the results calculated by myself, those calculated by pro11, and the actual values compare? If the distillation calculations for the tower are considered mature, then careful attention needs to be paid to the reaction aspect, to see what differences exist in the calculation methods. Everyone can share their experience with coupled distillation.
The calculation is done by first using pro/II to determine the total concentration of a certain reaction plate, then multiplying this value by the molar fractions of various substances. Subsequent calculations are carried out based on the kinetic equations entered by the user, and the results are compared with those obtained by pro/II (as listed in the output file).
The problem is that the calculated deviation is way too large – it’s about ten times higher. Moreover, I have no idea what the units of those predefined variables are, and I couldn’t find any information on where to check that
Perhaps it would be better to clarify the units; the units in the reaction kinetics equations need to be consistent.
I couldn’t find any explanation regarding the unit; in my understanding (also based on the MTBE example), the unit is the same as that used for initialization.
I’m sorry; I made a mistake in my calculations. The MTBE example has no issues at all, and it is a good example for studying PRO/II catalytic distillation simulations.
Could you share your experience? Where did things go wrong?
There was no mistake; I made an error in my calculations of the reaction rate. The difficulty in using PRO/ii for catalytic distillation simulations lies in those custom FROTRAN programs for describing the kinetics, as the kinetics of catalytic reactions generally cannot be expressed simply in the form of power functions. In such cases, it is necessary to write one’s own programs to define the kinetics. The PRO/ii catalytic distillation simulation is quite good and converges easily.
I just looked at this example a couple of days ago. However, there is no file containing this example in PROII. I created one by myself using KEYWORD (without importing it directly), but that program has errors. Could the original poster please advise me on how to define the catalyst GCAT in the tower module? I can’t find GCAT in the dropdown menu under REACTION (because GCAT isn’t defined among the components)!