Research Article
Maedeh Asari and Faramarz Horm
Abstract
This paper focuses on the effect of surfactants on the bubble size. Bubble size in Sodium dodecyl sulfate /water system were investigated at various superficial gas velocities (0.13, 0.26 and 0.5 cm/s). On the other hands, Bubble diameter was determined for different values of Sodium dodecyl sulfate surfactant concentration. Surfactant concentration in water were 0.05, 0.02 and 0.1 vol.%. Tap water and aqueous solutions with surfactants (anionic, non-ionic and zwitterionic) are used as liquid phases. The bubbles size in this phase is determined at Cs=0.05%vol and ug=0.13 cm/s. The bubbles are generated into a small-scale bubble column making of Plexiglas with height of 1.2 m. High speed photography techniques are used to measure the bubble size. The experimental results were shownthat bubble diameter in Sodium dodecyl sulfate /water system is larger than other systems. In solution of Sodium dodecyl sulfate, Sauter mean bubble diameter (Location A and D) decreases when superficial gas velocity increased.