Seeking help with aromatic extraction simulation
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I want to simulate a tower for benzene extraction using HYSYS, with ASPEN’s component data and property packages. The poor solvent consists of 88% sulfolane and 12% xylene, while the feed consists of 80% benzene and 20% non-aromatic C5–C7 compounds. I’ve tried using both NRTL and UNIFAC models, but in both cases the results did not match the actual operating conditions; no benzene or xylene was detected at the top of the tower. But the actual figure is still 3%–10%. Do I need to manually enter binary interaction parameters or something? What are the steps for implementation? Thank you
Could you provide the process flow? In the petrochemical industry, this sulfolane seems to be used as an extractant, and it’s crucial that the binary interactions involved are complete and reliable. There are examples of binary parameter regression in the forum for reference.
The software’s material property package lacks the binary interaction parameters for the solvent component sulfolane and the various C8 aromatic components (M/O/P xylene and ethylbenzene), resulting in unreliable calculation results. The user needs to provide these binary interaction parameters in order to simulate the BTX aromatic extraction unit more accurately.
The software’s material property package lacks the binary interaction parameters for the solvent component sulfolane and the various C8 aromatic components (M/O/P xylene and ethylbenzene), resulting in unreliable calculation results. The user needs to provide these binary interaction parameters in order to simulate the BTX aromatic extraction unit more accurately.
Hey expert, I just want to know how to use software to fill in these numbers. Thank you
First, it is necessary to obtain phase equilibrium experimental data for the four binary systems consisting of the reliable solvent component sulfolane and the various C8 aromatic components (MX/OX/PX and EB). Only after that can the “Regressing Property Data” tool module in the software be used to determine the interaction parameters for these four binary systems. At the end of the 1990s, a well-known domestic university was commissioned to conduct experimental measurements on the phase equilibrium data for these four binary systems; hundreds of thousands of yuan were spent on this effort. The corresponding interaction parameters were determined through regression analysis, and by consulting the DECHEMA Chemistry Data Series (CDS), more than a dozen infinite-dilution activity coefficients for other less critical binary components were obtained, which finally enabled the simulation calculations for the sulfolane-based process for extracting aromatic hydrocarbons.
It has been done before, and it can provide a fairly good simulation. The physical properties use UNIQUAC-ideal. There is no need to fill it in manually.
Could you send me your simulation file to take a look?