187-191<span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Predictions of hydrodynamic
performance of an air-lift reactor (ALR) have traditionally considered bulk gas
and liquid phase characteristics. This study aims to present an alternative
approach of modelling an ALR by estimating the energy input to the reactor and
gas hold-up in the riser based on dynamics of individual bubbles. The bubbles
have been assumed to rise in discrete layers in the riser having a diameter in
equilibrium with the surrounding pressure. The model predictions of gas hold-up
and liquid velocity in the downcomer for ALRs have been compared with the
reported experimental data.</span