Hydrodynamic investigation of bubble-column reactors: effect of column configuration
MetadataShow full item record
Bubble-column reactors are quite popular in the chemical, biochemical and petrochemical industries due to their relatively simple construction, favourable heat and mass transfer properties and low operating cost. Among the various design parameters, column geometry (configuration) has a significant impact on the overall throughput. In this study, an experimental investigation of the bubble-column configuration on its hydrodynamics has been conducted with three different sizes of the column (ID = 10–45 cm). A comparison in terms of the overall gas holdup as well as localised bubble properties is performed using the four-point optical technique and hydrodynamic similarities/dissimilarities are discussed. The study showed that the overall gas holdup was a function of the gas flow rate. For the range of gas velocity investigated (9.5–22.3 cm3/ min), the smaller column had 50–60% more holdup than the bigger column. Localised bubble properties exhibited similar behaviour (i.e. higher values for the smaller column). A comparative study of L/D illustrated an invariant behaviour at a high value of L/D (>5.5). A low L/D (≤1.5), however, showed a prominent influence on hydrodynamics.
Showing items related by title, author, creator and subject.
Dynamics of a Taylor bubble in steady and pulsatile co-current flow of Newtonian and shear-thinning liquids in a vertical tubeAbishek, S.; King, A.; Narayanaswamy, Ramesh (2015)A computational analysis is carried out to ascertain the effects of steady and pulsatile co-current flow, on the dynamics of an air bubble rising in a vertical tube containing water or a solution of Carboxymethylcellulose ...
Computational Fluid Dynamics-Based Hydrodynamics Studies in Packed Bed Columns: Current Status and Future DirectionsMalang, J.; Kumar, P.; Saptoro, Agus (2015)A careful review of the literature reveals that extensive research has been done on the hydrodynamics in packed bed columns using turbulence models. It can be noted that the choice of turbulence model is influenced by the ...
Albijanic, Boris; Chatterjee, S.; Subasinghe, Nimal; Asad, Mohammad W.A. (2016)© 2016 This paper investigates the impact of surface tension gradient on liquid circulation time in a draft tube airlift reactor using dilute alcohol solutions. The experimental work proves the existence of three bubble ...