The shrinking core model is used to describe situations in which solid particles are being consumed either by dissolution or reaction and, as a result, the amount of the material being consumed is “shrinking.” This model applies to areas ranging from pharmacokinetics (e.g., dissolution of pills in the stomach) to the ...

What is the limitation of shrinking core model?

Shrinking core model exhibits inherent limitations to the reactions with a porous particle. Ahn and Choi (2017) indicated that the shrinking core model for a porous pellet would become 837 valid only when the reaction was controlled by inward diffusion (i.e., the reaction proceeded with the core-shell structure). ...

What is progressive conversion model?

Progressive Conversion Model. • reactant enters and reacts with the particle at all times. • different rates at different locations within the particle. • solid reactant is converted continuously and. progressively throughout the particle.