Gas-Liquid Mass Transfer Coefficient in Stirred Tank Reactors

Determination of Volumetric Mass Transfer Coefficient in Gas-Solid-Liquid Stirred Vessels Handling High Solids Concentrations: Experiment and Modeling

Rigorous analysis of the determinants of volumetric mass transfer coefficient (kLa) and its accurate forecasting are of vital importance for effectively designing and operating stirred reactors. Majority of the available literature is limited to systems with low solids concentration, while there has always been a need to investigate the gas-liquid hydrodynamics in tanks handling ...

Gas-liquid mass transfer coefficient in stirred tanks interpreted through bubble contamination kinetics

Experimental data on the average mass transfer liquid film coefficient (kL) in an aerated stirred tank are presented. Liquid media used were tap water, electrolyte solutions and water with controlled addition of tensioactive material. Values of kL range from those expected for bubbles with a mobile surface to those expected for rigid bubbles. These data are quantitatively interpreted in terms o...

Continuous stirred tank reactors: easy to stabilise?

The objective of this work is to make use of methodologies and tools from nonlinear Lyapunov theory in the design of bounded control laws for the temperature stabilisation of Continuous Stirred Tank Reactors CSTRs with exothermic or endothermic reactions Simple output feed back control laws i e control laws that feed back only the available mea surements are designed It is shown that these cont...

Mass Transfer in a Closed Stirred Gas / Liquid Contactor Part 1 : The Mass Transfer Rate

Liquid phase mass transfer rates kLS for the absorption of oxygen in tap water and in aqueous ionic solutions have been determined in two closed stirred tank contactors for a power input between 3 and 70 W/kg and (impeller diameter)f(tank diameter) ratios DifT of 0.3, 0.35 and 0.4. The contactors had diameters of 0. I9 and 0.6 m. The dispersed phase fraction was 1% by volume in all experiments....

experimental investigation of power consumption, mass transfer coefficient and flow regime in gas-liquid dispersion systems