Help needed! The Aspen distillation column results are not reasonable
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Hello everyone, I have just started using the Aspen simulator. Only the reactants and the target product are available in the database; the other by-products need to be added manually. There seems to be some issue with the results for the T2 distillation column – the boiling point of MDA, which is 378 degrees, is higher than that of H12MDA, which is 314 degrees. Why do both end up at the top of the column? I want to achieve 99% H12MDA at the tower top. I’ve attached the file; the process isn’t complicated and there are no loops. Please help me take a look. A beginner kneeling in gratitude; by the way, mine is version V11
I forgot to mention it – my reactant is 4,4-diaminodiphenylmethane, and the target product is 4,4-diaminodicyclohexylmethane
1. Is the result usable after your simulation? 2. Is a minimum boiling azeotrope formed in your system, carrying the boiling MDA to the top of the tower, resulting in a concentration that appears to be higher than that of H6MDA?
Is it due to the presence of an azeotrope?
This problem often occurs when using Aspen to estimate vapor pressure data for substances. Generally, NIST estimation data is used, which can lead to improvements