K-values, relative volatilities, and binary interaction parameters for process simulation.
| Component | 100 psia | 300 psia | 500 psia | 1000 psia |
|---|---|---|---|---|
| Methane | 8.90 | 3.30 | 2.10 | 1.15 |
| Ethane | 1.80 | 0.68 | 0.43 | 0.24 |
| Propane | 0.47 | 0.19 | 0.12 | 0.068 |
| i-Butane | 0.17 | 0.070 | 0.045 | 0.026 |
| n-Butane | 0.13 | 0.054 | 0.035 | 0.020 |
| i-Pentane | 0.048 | 0.021 | 0.014 | 0.0082 |
| n-Pentane | 0.040 | 0.017 | 0.011 | 0.0067 |
| CO₂ | 2.50 | 0.92 | 0.58 | 0.32 |
| H₂S | 1.20 | 0.46 | 0.29 | 0.16 |
| Component | At 100°F | At 150°F | At 200°F | At 250°F |
|---|---|---|---|---|
| Methane | 68.5 | 52.3 | 41.2 | 33.5 |
| Ethane | 13.8 | 11.2 | 9.4 | 8.1 |
| Propane | 3.62 | 3.25 | 2.96 | 2.73 |
| i-Butane | 1.31 | 1.27 | 1.24 | 1.21 |
| n-Butane | 1.00 | 1.00 | 1.00 | 1.00 |
| i-Pentane | 0.37 | 0.40 | 0.42 | 0.44 |
| n-Pentane | 0.31 | 0.33 | 0.36 | 0.38 |
| Comp 1 | Comp 2 | kij | Comments |
|---|---|---|---|
| Methane | Ethane | 0.0000 | Zero for similar components |
| Methane | Propane | 0.0090 | Small positive value |
| Methane | n-Butane | 0.0133 | Increases with MW difference |
| Methane | CO₂ | 0.0919 | Significant for polar/nonpolar |
| Methane | H₂S | 0.0830 | Important for sour gas |
| Ethane | CO₂ | 0.1322 | High for dissimilar molecules |
| Propane | CO₂ | 0.1241 | Affects VLE calculations |
| CO₂ | H₂S | -0.0100 | Negative for similar polarity |