Hydrodynamic Characteristics Effect of Foam Control in a Three-Phase Fluidized Bed Column | ||
| Journal of Petroleum Research & Studies | ||
| Article 1, Volume 212, Issue 6, December 2012, Pages 158-185 | ||
| Authors | ||
| Mohammad Fadhil; Ahmed Ali Hadi; Shakir Mahmood Ahmed | ||
| Abstract | ||
| work it was found that: Flow regimes of multiphase system could be easily determined by utilizing local gas holdup profile measured by pressure drop transducer method. The transition from the homogenous to heterogeneous regime was advanced, from ug=4 to 2cm/s with increasing solid concentration from 10 to 20%v and decreasing average particle diameter from dp=(0.8) to (0.25) mm. When a mixture of water/surfactant was employed in the bubble column, foam could be present depending on the input operating parameters. The fluid mechanism of foam suppression with hydrophilic particles was enhanced by a direct attack on the foam by hydrophobic particles (i.e. hydrophobic particles were more effective in retaining liquid–destroying foam than the hydrophilic particles). It was found that hydrophobic particles of 0.25 mm average diameter and 10%v loading in the reactor could reduce foaminess fraction from 0.85 to 0.15 if the liquid velocity was 0.3 cm/s. The foaminess fraction could be reduced to 0.0 if the liquid velocity increased to 0.4 cm/s. The results of this study may have abroad applications in petroleum and petrochemical industries where liquid hydrocarbons are processed. | ||
| Keywords | ||
| Three; phase fluidized; bed column; local gas holdup; foam suppression; hydrophobicity | ||
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