Exploration of reactive distillation-reaction kinetics units
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When ASPEN is used to simulate reactive distillation systems, the software has strict requirements regarding the input of reaction kinetics data. For example, the units of the rate constants involved in the reaction kinetic equations must be in the International System of Units, such as kmol/m3·s. However, in some cases, the known units of a rate constant are 1/s. In such situations, how should these values be converted to the units required by ASPEN? Please give me some guidance. Thank you!
This is quite easy; it’s just a unit conversion, but it’s not easy to describe. It’s better to refer to physical chemistry for that
Only the pre-exponential factor of the rate constant must be in the SI system; the others are not required. Quoted from some tutorial... (sadly, I forgot the source)
I’ve learned it and am working on the problem of reactive distillation simulation!
Since the reaction orders are different, the units of the reaction rate constants also vary; therefore, the software cannot display these units directly. It is specified that the units of the pre-exponential factor should be in the SI system, and that will suffice. There is a detailed explanation in the help section
What was said upstairs is correct; the values should be converted to the appropriate units according to the input format requirements in Aspen for calculation
This depends on the unit system you are using; you can check it in the global setup
Below is a picture showing unit conversions; I don’t quite understand it, but I hope it will be helpful to everyone.
Please pay attention to the unit conversions in the formulas above; I hope everyone will discuss them with each other