Аннотация:The gas‐phase mass transfer characteristics in a counter airflow shear rotating packed bed (CAS‐RPB) were studied. The gas volumetric mass transfer coefficient ( k y a e ) was characterized with the physical absorption system NH 3 ‐H 2 O and the effective interfacial area ( a e ) was determined by the chemical absorption system CO 2 ‐NaOH, and then the gas‐phase mass transfer coefficient ( k y ) was obtained. The gas‐phase mass transfer characteristics in the CAS‐RPB were compared with those in the rotating packed bed with split packing (SP‐RPB) under the same operating conditions. The experimental results indicated that the k y a e , a e , and k y for counter‐rotation of adjacent packing rings in the CAS‐RPB and SP‐RPB were larger than those for co‐rotation, and the k y a e , a e , and k y for counter/co‐rotation in the CAS‐RPB were respectively greater compared with those for counter/co‐rotation in the SP‐RPB. This confirmed that the CAS‐RPB can further intensify the gas‐phase mass transfer process compared to the SP‐RPB. Moreover, the correlative expressions for the k y a e , a e , and k y in the CAS‐RPB and SP‐RPB were obtained and were in close agreement with the experimental results.
