Table 1
24 complete factorial design for bubble diameter and gas holdup.
| Factors | Low level (−1) | High level (+1) |
|---|---|---|
| Salinity (NaCl) (g/L) | 60 | 200 |
| Polymer concentration (mg/L) | 100 | 2000 |
| Surfactant concentration (mg/L) | 0 | 100 |
| Superficial gas velocity (cm/s) | 0.25 | 0.50 |