Volumetric mass transfer coefficient in external loop airlift membrane reactor

Mass transfer coefficient is one of the important mass transfer parameters of the airlift reactor. A new type of external loop membrane reactor integrated with the ceramic membrane aeration system and the external loop reactor was put forward. For air-water system, the variation regularities of the volumetric mass transfer coefficients in this type of reactor were experimentally investigated under the conditions of different aeration volume, aeration pressure, aeration way and aeration position. The result indicates that many factors, such as aeration volume, aeration pressure, aperture of the sparger, have strong influence on the volumetric mass-transfer coefficient, of which the aperture influence is especially remarkable, and the volume mass-transfer factor is increased by nearly 100% when using the membrane instead of sparger. Aerating with membrane and sparger, a larger gas-liquid contact area was obtained in the situation of a good gas-liquid cycle, thus optimizing gas-liquid mass transfer.