A three‐zone mass transfer model for a rotating packed bed. Issue 6 (26th March 2019)

• Record Type: Journal Article
• Authors: Sang, Le; Luo, Yong; Chu, Guang‐Wen; Sun, Bao‐Chang; Zhang, Liang‐Liang; Chen, Jian‐Feng
• Is Part Of: AIChE journal. Volume 65:Issue 6(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-03-26
• Subjects: CO2 absorption -- mass transfer model -- radial thickness of end zone -- rotating packed bed -- three‐zone; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.16595
• Languages: English
• ISSNs: 0001-1541

Abstract

Abstract: A rotating packed bed (RPB) is recognized for its merits in chemical process intensification. In most studies of RPB mass transfer modeling, however, the effects of the end and cavity zones have not been taken into consideration, since it was very difficult to distinguish the end and bulk zones by hydrodynamics and mass transfer process. In this work, the radial thickness of the end zone was obtained by developing a probability method and imaging experiments to separate the end and bulk zones. A three‐zone model, including end, bulk, and cavity zones, of the overall gas‐side volumetric mass transfer coefficient ( K G a )t was first established. Experiments of dissolved MEA chemisorption of CO2 were carried out to validate the proposed three‐zone mass transfer model. The results of the MEA‐CO2 absorption experiments showed that the experimentally obtained values of CO2 absorption efficiency were in agreement within ±20% with the model predictions.