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What exactly is the K value that is entered when using Aspen to simulate dynamic reactions?

2016-06-07View Original

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As the title suggests, I would like to know which part of the kinetic equation that K value represents – does it refer to the pre-factor? Why do I see that the order of magnitude of the pre-exponential factor in some kinetic equations is 10 to the 10th power? It’s not possible to enter such large values in Aspen; I would be very grateful if an experienced person could give me some guidance.
Reply #22016-06-07
It exists in chemical reaction engineering; it should be the kinetic constant, enter 10 to the power of 10: 1E10
Reply #32016-06-08
There are many K values in Aspen, such as the pre-exponential factor k, the equilibrium constant K, and the adsorption constant K; it depends on the specific context
Reply #42016-06-08
The K rate constant has units.
Reply #52016-06-08
Thank you for your guidance. If it’s 3 multiplied by 10 to the power of 10, that’s 3E10, right?
Reply #62016-06-08
Thank you for your reply. I have only used two types of chemical reaction models: LHHW and Power Law. Could you please tell me what K represents in these two types?
Reply #72016-06-08
Thank you for your guidance. What unit should the K value be in when entering the kinetic factor for Aspen when inputting kinetic data?
Reply #82016-06-08
After you convert your kinetic model to SI units, the corresponding k value can be directly entered into Aspen

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