Studies On Gas-Liquid Mass Transfer And Pressure Drop Characteristics Of Rotor-Stator Reactor

The Rotor-Stator Reactor (RSR) was developed on the basis of RotorPack Bed (RPB), but it overcomes the RPB's shortcomings. The RSR has thesame Characteristics as the advantages of RPB. The stator and rotor-parts arearranged in the interval sequence along direction, which is equal to several endeffect zone. The fluid, which flows cross between the stator-parts and therotor-parts, is sheared and broken up. And then the fluid is dispersed andredistributed. It is different from RPB that there are no packed in RSR. So theRSR is prone to clean. The channels of fluid are not easy to be fouled, so it issuitable for high viscous or crystal system.With a N₂-H₂O-O₂ system, the gas-liquid mass transfer characteristics of(RSR) were studied. And then the correlation equation of the volume masstransfer coefficient of liquid phase was derived through dimensional analysismethod. Furthermore, the characteristics of gas pressure drop in the RSR wereinvestigated by using air-water system. The results showed that:1,The mass transfer characteristics of RSRThe RSR had good mass transfer efficiency. The volume mass transfer coefficient of liquid phase in RSR was at the same order of magnitude(i.e.10⁴mol·m^-3·s^-1) as that of RPB.Based on film theory, mass calculation was used to deduce the equationof volume mass transfer coefficient of liquid phase:NTU=x_in-x_out/x_in-x_out+Py_out/E_outln x_in/x_out-Py_out/E_outThe correlation equation of the volume mass transfer coefficient of liquidphase was ( k_xa=12.2394G_V^0.07894G_L^0.7780N^0.3041D_i^1.5816. The statistical test ofcorrelation equation showed that the values predicted by the correlationequation were in good agreement with the experimental data. The relativeerror of the volume mass transfer coefficient of liquid phase betweenexperimental data and calculation of the correlation equation was±15%.2. The gas pressure drop characteristics of RSRThe gas pressure drops in dry and wet RSR were lower than that 450kPa.The pressure drop of wet RSR was 100kPa larger than that of wet RPB in theparallel-current condition. In other conditions, pressure drops of RSR wereless than that of RPB.The correlation equation of the gas pressure drop:â–³P=A_l·G^l₁·L^l₂·N^l₃The values predicted by the correlation equation were in good agreementwith the experimental data in every operational condition of RSR. The relative error of the gas pressure drop between experimental data and calculation ofthe correlation equation is±15%.