Table 2.
Details of the phase stability, phase equilibrium, and reactive phase equilibrium problems used in this study.
| Code | System | Feed conditions | Thermodynamic models | Global optimum |
|---|---|---|---|---|
| T7 | C1 + C2 + C3 + C4 + C5 + C6 + C7–16 + C17+ | n F = (0.7212, 0.09205, 0.04455, 0.03123, 0.01273, 0.01361, 0.07215, 0.01248) at 353 K and 38500 kPa | Phase stability problem with SRK EoS with classical mixing rules | −0.002688 |
|
| ||||
| T8 | C1 + C2 + C3 + iC4 + C4 + iC5 + C5 + C6 + iC15 |
n
F = (0.614, 0.10259, 0.04985, 0.008989, 0.02116, 0.00722, 0.01187, 0.01435, 0.16998) at 314 K and 2010.288 kPa |
Phase stability problem with SRK EoS with classical mixing rules | −1.486205 |
|
| ||||
| T9 | C1 + C2 + C3 + C4 + C5 + C6 + C7 + C8 + C9 + C10 |
n
F = (0.6436, 0.0752, 0.0474, 0.0412, 0.0297, 0.0138, 0.0303, 0.0371, 0.0415, 0.0402) at 435.35 K and 19150 kPa |
Phase stability problem with SRK EoS with classical mixing rules | −0.0000205 |
|
| ||||
| G4 | C1 + H2S |
n
F = (0.9813, 0.0187) at 190 K and 4053 kPa |
Phase equilibrium problem with SRK EoS with classical mixing rules | −0.019892 |
|
| ||||
| G6 | C2 + C3 + C4 + C5 + C6 |
n
F = (0.401, 0.293, 0.199, 0.0707, 0.0363) at 390 K and 5583 kPa |
Phase equilibrium problem with SRK EoS with classical mixing rules | −1.183653 |
|
| ||||
| G7 | C1 + C2 + C3 + C4 + C5 + C6 + C7–16 + C17+ | n F = (0.7212, 0.09205, 0.04455, 0.03123, 0.01273, 0.01361, 0.07215, 0.01248) at 353 K and 38500 kPa | Phase equilibrium problem with SRK EoS with classical mixing rules | −0.838783 |
|
| ||||
| G8 | C1 + C2 + C3 + iC4 + C4 + iC5 + C5 + C6 + iC15 |
n
F = (0.614, 0.10259, 0.04985, 0.008989, 0.02116, 0.00722, 0.01187, 0.01435, 0.16998) at 314 K and 2010.288 kPa |
Phase equilibrium problem with SRK EoS with classical mixing rules | −0.769772 |
|
| ||||
| R4 | A1 + A2 ↔ A3 + A4 (1) Acetic acid (2) n-Butanol (3) Water (4) n-Butyl acetate |
n F = (0.3, 0.4, 0.3, 0.0) at 298.15 K and 101.325 kPa | Reactive phase equilibrium problem with UNIQUAC model and ideal gas: lnK eq = + 0.8 |
−1.10630 |
|
| ||||
| R7 | A1 + A2 ↔ A3 | n F = (0.52, 0.48, 0.0) at 323.15 K and 101.325 kPa | Reactive phase equilibrium problem with Margules solution model: K eq = 3.5 |
−0.653756 |