Aspen simulation of small packed absorbers
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I am working on my master’s thesis and have used a small packed absorber to absorb water vapor with a concentrated LiBr solution, thereby obtaining a dilute LiBr solution. The BX-type filler used has a diameter of 20 cm and a height of approximately 10–20 cm. I want to learn *Aspen to simulate this process; I’m not sure if Aspen can be used to simulate such small absorbers Can the simulation results yield the distributions of temperature, pressure, and mass transfer coefficient within the filler along its height?
It can be simulated, no problem! For those distributions you mentioned, it’s estimated that everything except the mass transfer coefficient can be obtained.
Original poster: The core of the problem is actually the issue related to the binary interaction parameters. You can check whether there are any binary interaction parameters for Libr and Water in A+. I checked just now, and it seems that there are no such binary interaction parameters for this system in A+, so the calculation results naturally cannot be used! Of course, if the original poster has experimental data, then after performing regression on that data, it should be possible to use A+. Last edited by windows98 on 2009-3-3 16:36]
Thank you so much for your advice! I’ve just started learning Aspen, and there are still many things I don’t understand. I tried it just now; following what was mentioned in the forum, I set up the ELECTRNRTL model, the HENRY parameters, 4 theoretical plates (I’m not quite sure what these mean), RADFRAC (ABSORBER), pack rating, and so on. As a result, “results not available” appears in the Henry coefficient column for the binary interaction coefficient. I wonder if it’s due to the lack of binary interaction coefficients?
I don’t know where to check whether such a parameter exists in A+ Only a few items in parameters->binary interaction show as input complete, while another one shows as results not available.
These parameters may be missing! It can only be determined through experiments by oneself, by analyzing the experimental data!
How to conduct experiments to measure the binary interaction coefficient of LiBr and WATER? Is it difficult? If I can get these parameters, should be possible to create this simulation, right? If it’s really feasible, I might need to tell my supervisor to conduct this experiment. Or are there estimation methods based on the theory of binary interaction coefficients? After all, graduation is in June; there isn’t much time, and the experimental conditions aren’t very good. . . This post was last edited by amo*cillin on 2009-3-4 16:40]
Graduating in June? Is it still in this state? I’m worried about you.......
Brothers, save me! ! ! A two-year master’s program has a relatively tight schedule. . . Sigh, sigh, sigh. . .