Heat and Mass Transfer at the Wall of a Square Mechanically Stirred Gas‐Liquid‐Solid Catalytic Reactor

Abstract

Wall mass and heat transfer rates in a square gas‐sparged, mechanically stirred reactor were measured by the electrochemical technique under the effect of various geometrical and hydrodynamic variables. For the 45° impeller, the mass transfer data fit the equation Sh = 0.7Sc0.33Re0.2Reg0.5 with an average deviation of ±6.9 %. For the 90° impeller, the data fit the equation Sh = 0.95Sc0.33Re0.14Reg0.53 with an average deviation of ±7.5 %. Gas sparging enhanced the wall mass transfer rates by factors of up to 2.61 and 3 for the 90° and 45° impellers, respectively, with a significant decrease in the total power consumption. The contribution of the present results to the operation of multiphase mechanically agitated vessels in different aspects is outlined.

Recovery of Li2CO3 from Spent LiFePO4 by Using a Novel Impurity Elimination Process

“…However, the Li content remains constant. Therefore, a reasonable L/S ratio can ensure the SLFP material is completely dispersed in the extraction agent, which improves the proton transfer speed between the solid and liquid phases and guarantees a high extraction efficiency [29,30]. On the other hand, it will also reduce the processing costs and duration of the concentration process.…”