Experimental solubility data of \(\mathrm{H}_{2} \mathrm{~S}\) in diglycolamine (DGA) have been provided by Martin et al. [17]. The DGA solution used in their experiment had \(60 \mathrm{wt} \%\) DGA, and the remainder was water. Equilibrium data, reported at two temperatures, \(50^{\circ} \mathrm{C}\) and \(100^{\circ} \mathrm{C}\), are shown in Table P16.16.

Table P16.16

Estimate the binary interaction parameters, considering an EOS model, a nonelectrolyte activitycoefficient model, and an electrolyte activity-coefficient model. Compare their performances.

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Table 16.16. Equilibrium Data for Problem 16.16 T = 50C T = 100C Moles HS Moles HS PHS (kPa) Moles DGA PHS (kPa) Moles DGA 2.5 0.221 4.9 0.057 3.9 0.262 9.3 0.071 5.4 0.291 13.4 0.095 8.9 0.344 16.5 0.100 11.5 0.381 17.5 0.116 18.9 0.452 48.2 0.182 28.3 0.508 55.1 0.210 53.1 0.543 65.3 0.217 46.2 0.577 126.0 0.316 63.1 0.608 273.0 0.456 72.9 0.654 396.0 0.522 86.1 0.657 509.0 0.571 121.0 0.699 620.0 0.639 121.0 0.711 662.01 0.640 217.0 0.778 987.0 0.712 414.0 0.877 1460.0 0.806 679.0 0.929 1660.0 0.849 1140.0 1.001 1890.0 0.909 1480.0 1.043 1730.0 1.052 1490.0 1.068 1730.0 1.091