Dissolution of solid particles in liquids: A surface layer model

Non-isothermal dissolution of a solid particle in liquid

“…In these expressions C,, and D,, denote the equilibrium concentration and the diffusivity of solute at Tb, and Ro is the initial radius of a particle. An energy balance for the material near the solid/liquid interface gives ks(aTdar) -kL(dTL/ar) = AHD,(aC/ar); r = R (7) where ks and k, are the thermal conductivities of solid and by dm/dt = -SD,(dC/ar),=R (13…”

Kinetics of uranium leaching process using sulfuric acid for Wadi Nasib ore, South western Sinai, Egypt

“…The model has been applied for U which assumes that during the course of the reaction an ash layer is formed around a shrinking core of unreacted solid reactant. As a result of the reaction progresses, the ash layer steadily increases inward towards the shrinking core, until all of the reactant solid reacted ) Levenspiel, 1999;Sohn, 2003;Hsu et al, 2009(. .…”

Mathematical model of precipitation of magnesium carbonate with carbon dioxide from the magnesium hydroxide slurry

“…The rate of dissolution is assumed to be controlled by mass transfer of the dissolving solids away from the solid-liquid interface (Bhaskarwar, 1988;Hsu et al, 1991;Riazi and Faghri, 1985;Rice and Jonea, 1979). A shrinking-particle model has been found suitable for describing the dissolution reaction of a nonporous sphere and is adopted here (Levenspiel, 2007).…”