“…This device generally has excellent heat and mass transfer characteristics, little maintenance and low operating costs (Kantarci et al, 2005). Important variables must be taken into account working with bubble columns: gas hold-up, bubble characteristics (size, shape, rise velocity, contamination) (Lage, 1999), flow regime, mass transfer, etc (Martínez and Casas, 2012). Different studies (Darmana et al, 2005;Cents et al, 2004) indicate that several phenomena influence these variables: chemical reaction, mass transfer and fluid flow.…”