Hydrodynamics in a cocurrent gas-liquid trickle bed at elevated pressures

摘要: Data on design and operation of trickle beds at elevated pressures are scarce. In this study the influence gas density liquid holdup, pressure drop, transition between pulse flow has been investigated in a tricklebed reactor operating up to 7.5 MPa with nitrogen or helium as phase. Gas-liquid interfacial areas have determined 5.0 by means CO2 absorption from CO2/N2 mixtures into amine solutions. A comparison results phase those shows that equal densities hydrodynamic states same. The gas-liquid area increases when higher densities. When dimensionless agl/as all within range 0.25-0.8, trickle-bed is suggested operate trickle-flow regime. strong holdup. Due gradients densities, holdup decreases noticeably. Besides, boundary pulse-flow regime shifts toward throughputs: region for operationg becomes larger. For gradient regime, correlations derived based numbers can be applied high-prssure beds.