How to simulate biogas high-pressure water washing for carbon removal using HYSYS
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Regarding how to simulate the carbon removal via high-pressure water washing of biogas using HYSYS, several articles online indicate that under conditions of around 20 degrees and 20 bar, using water in a ratio of 10 times the molar flow rate of the feed gas is sufficient to reduce the carbon dioxide concentration, which is initially around 40%, to below 3%. In my own simulations, however, whether I used the Chien Null equation or the NRTL equation, the results were still poor with a carbon dioxide concentration remaining above 25%. I would like to ask the experts how to choose the correct property package (whether it is necessary to modify the coefficients in such a package) as well as the appropriate column settings.
It is necessary to understand the solubility of CO2 in water.
How did you simulate it? Was an absorption tower used? Or just use a flash tank?
Absorption tower~~20 trays, tower pressure 2.0 MPa