Bubble rising velocity and bubble size distribution in columns at high pressure and temperature: From lab scale experiments to design parameters

The design of bubble column for industrial applications is well known under near ambient pressure and temperature conditions, contrary to high conditions. Accurate data on the evolution behaviour bubbles proposed as a basis evaluation surface area developed in further such reactor. Two columns are used experiments: small (8 mL) with total visualisation flow, bigger one (1 L), necessary scale up. Main results show that influence significant size distribution must be characterized considered allow determination two correlations: diameter other rise velocity, considering different parameters, especially superficial gas velocity saturated These correlations determine mass transfer at