| In this study, the experimental equipment was RPB. The mass transfer of the cavity area and the whole bed, cavity area ratio, variable speed fluid volume and temperature effects on the experimental results were investigated. In NaOH absorption CO2 system, with the increase of rotational speed, The CO2 removal rate of the whole bed first rapidly increased and then decreased. In cavity area, the CO2 removal rate increased with the increase of RPB speed. With the increase of liquid flow rate, the cavity area and the whole bed of CO2 removal rate increased. The influence of temperature on the removal rate of the cavity area and the whole bed is slight. The cavity area ratio of the whole bed was 23% to 29%. In MDEA absorption CO2 system, the cavity area ratio of the whole bed was 29% to 33%. For the liquid film control system, the cavity area ratio of the whole bed was about a quarter. The major part of the mass transfer happened in the packing area. In H2O absorption NH3 system, the cavity area ratio of the whole bed was about 82%. The ration remained unchanged with rotational speed, gas flow rate, liquid flow rate and temperature change. The cavity area was occupied most of the proportion of the whole bed. It proved the existence of gas phase end effect zone. The ammonia absorption NH3 cavity area and the water absorption NH3 whole bed were compared. It eliminated the influence of liquid phase concentration gradient of the experiment result. The cavity area was still occupied most of the proportion of the whole bed. In H2O absorption NH3 system, the volumetric gas phase mass transfer coefficient of the cavity area and the whole bed sharply increased with the increase of gas rate. The volumetric gas phase mass transfer coefficient and absorption rate of the cavity area and the whole bed increased with the increase of liquid flow rate. The volumetric gas phase mass transfer coefficient and absorption rate of the cavity area and the whole bed decreased with the increase of temperature. |
PDF Full Text Request