Simulating the change in shape factor for solid particles used in flue gas desulfurization and reacting in stirred batch systems. A mathematical model.

Carbonates are widely used in flue gas desulfurization (FGD) processes because of their ability to form sulfur-carbonate compounds [1]. It is well established that particle size and shape substantially influence the bulk properties of powdered materials, although these characteristics are closely interrelated [2]. In order to evaluate accurately the dissolution rate the shape factor for any particle cannot be considered to be constant during the dissolution event, against what is commonly assumed. In the present study a simulation for the evaluation of the shape factor is presented and tested. Furthermore the shape factor variation as a function of dissolution time was estimated by a modification of the Hixson-Crowell cube root law method. The model emphasizes the meaning of the shape factor in the manifestation of the dissolution behavior.