On the modeling and simulation of coupled adsorption and thermosolutal convection in supercritical carbon dioxide

Abstract

Abstract In this paper, we present a numerical study along with an exhaustive adsorption investigation in a binary dilute mixture model nearby the solvent’s critical point in a configuration relevant for soil remediation. By means of this model, mass and heat transfer efficiency were qualitatively and quantitatively discussed through this work. The convergence of the solution was evaluated on the values of the Nusselt and Sherwood numbers. The results reveal intense convection expanding into the cavity close to the critical point, thus enabling homogeneous adsorption of the solute. Moreover, the mass fraction perturbation isolines exhibit the existence, along the adsorbent plate, of a thin boundary layer which becomes thinner when approaching the critical point.

Keywords

• Adsorption
• Mass transfer
• Supercritical carbon dioxide
• Mixture fluid
• Piston effect
• Supercritical fluid deposition