Open Access

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

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