n-Methyl-2-pyrrolidone (NMP) is a physical solvent that is widely used for acid gas removal. For improving the accuracy of the VLE calculation using an activity-coefficient model, it is desired that the parameters of the vapor-pressure model be estimated first.

Assume that the Antoine equation will be used for calculating the vapor pressure. Using the vapor-pressure data [25, 26, 27] in Table P16.26(a), estimate the parameters of the Antoine equation.

Solubility data of CO₂ in NMP at 25°C, 50°C, and 100°C [28]. Estimate the binary interaction parameters, considering an EOS model and an activity-coefficient model using the Antoine parameters estimated before.

Compare the results from these models with the results from the corresponding EOS and activity-coefficient models with default parameters from the simulator databank, if these parameters are available in the simulator you are using.

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Table P16.26(a) Vapor-Pressure Data for Problem 16.26(a) T (°C)P * (kPa)T (°C)P * (kPa) 25.00 0.046 170.0541.475 40.00 0.133 63.73 0.517 75.59 1.024 94.03 2.595 177.7751.630 184.5462.166 190.3472.425 195.6082.826 109.805.160 200.2693.043 127.5910.329 202.0997.304 147.5620.701 204.21102.432 160.3131.022