| Parameters | LTP | NCP | NLP | PSP | |
|---|---|---|---|---|---|
| Stage number | 16 | 30 | 11 | 15 | |
| Feed stage | Main feed | 6 | 18 | 1 | 1 |
| Reflux RE1″ | 1 | 1 | 6 | 6 | |
| Reflux RE2″ | 8 | — | 4 | 7 | |
| Overhead pressure /kPa | 2999 | 2103 | 4238 | 3000 | |
| Bottom pressure /kPa | 3034 | 2186 | 4273 | 3060 | |
| Constraints of column | Ethane mole fraction of overhead gas 0.0089%; Overhead gas flow 10000 kg/h |
Ethane mole fraction of overhead gas 0.0107% | Ethane mole fraction of overhead gas 0.0067% | Ethane mole fraction of overhead gas 0.0097% | |