The hydrodynamic property and gas liquid mass transfer efficiency of membrane separation reactor with inner loop carriers was studied in the tap water test. The result showed that the critical gas velocity needed by circulation fluidization state was 6.2~7.7 m/h when the carrier holdup and liquid flow were 2%~8% and 0~16 L/h,respectively . After the carrier was added, the gas holdup and oxygen transfer coefficient can be improved with the increase of gas velocity and be reduced with increase of carrier holdup. Gas holdup was 0.65%~3.5% and oxygen transfer coefficient was 8.32~28.0 h-1when carrier holdup, liquid flow and gas velocity were 0~6%,5.3 L/h and 7.5~30.1 m/h,respectively . The circulating time and mixing time can be reduced with increase of gas velocity and carrier holdup. The circulating time was 2.9~34 s and mixing time was 10.2~41.9 s when carrier holdup, liquid flow and gas velocity were 0~6%, 5.3 L/h and 3.8~22.6 m/h, respectively.
