Study on the Solid–Liquid Mass-Transfer Performance of Suspension in a Rotating Packed Bed
Bing Liu, Kun Dong, Ru-Jia Chen, Songtao Chang, Guang‐Wen Chu, Liang‐Liang Zhang, Hai‐Kui Zou, Bao‐Chang Sun
Abstract
This work presents the study on solid–liquid mass-transfer performance of suspension in a rotating packed bed (RPB). The calculation model of solid–liquid mass-transfer coefficient ( k S ) is deduced on the basis of the mass conversation law. The k S in RPB is measured using the suspension of cation-exchange resin particle reaction with NaOH solution. The effects of different operating conditions such as the dispersion time ( t ) in a stirred tank reactor (STR), the rotating speed ( N ), the mesh packing thickness ( w ), the liquid volume flow rate ( L T ), and the solid loading ( e ) on the RPB are investigated. The results show that k S increases with the increase of N and w; it increases first and then tends to remain constant with the increase of t and L T . However, e has little influence on k S . A nondimensional equation for Sh is established, and the predicted and experimental values of Sh are in good agreement with a deviation within ±15%. Furthermore, the maximum value of Sh of 124 is obtained under the conditions, t = 0.5 h in STR, N = 2200 rpm, L T = 56 L/h, e = 15 g/L, and w = 24 mm, which is higher than those in the microreactor (MR) and STR. Here, RPB exhibits great application potential in the solid–liquid mass-transfer or reaction process.