Abstract: The local gas-phase flow characteristics such as local gas holdup (εs), local bubble
velocity (Vb) and local bubble mean diameter (db) at a specified point in a gas-liquid-
solid three-phase reversed flow jet loop reactor was experimentally investigated by a five
-point conductivity probe. The effects of gas jet flow rate, liquid jet flow rate, solid
loading, nozzle dianeter and axial position on the local εg, Vb and db profiles were
discussed. The presence of solids at low solid concentrations not only increased the local
eg and Vb, but also decreased the local db. The optimum solid loading for the maximum local
εg and Vb together with the minimum local db was 0.16 × 10-3 m3,corresponding to a solid
volume fraction, εs = 2.5%.

Key words: local gas holdup, local bubble velocity, local bubble mean diameter, gas-liquid-solid three-phase, reversed flow jet loop reactor

摘要： The local gas-phase flow characteristics such as local gas holdup (εs), local bubble
velocity (Vb) and local bubble mean diameter (db) at a specified point in a gas-liquid-
solid three-phase reversed flow jet loop reactor was experimentally investigated by a five
-point conductivity probe. The effects of gas jet flow rate, liquid jet flow rate, solid
loading, nozzle dianeter and axial position on the local εg, Vb and db profiles were
discussed. The presence of solids at low solid concentrations not only increased the local
eg and Vb, but also decreased the local db. The optimum solid loading for the maximum local
εg and Vb together with the minimum local db was 0.16 × 10-3 m3,corresponding to a solid
volume fraction, εs = 2.5%.

关键词: local gas holdup;local bubble velocity;local bubble mean diameter;gas-liquid-solid three-phase;reversed flow jet loop reactor