  Fluid-solid reactions exist in many chemical and metallurgical process
industries. Several models describe these reactions such as volume reaction
model, grain model, random pore model and nucleation model. These models give
two nonlinear coupled partial differential equations (CPDE) that must be solved
numerically. A new approximate solution technique (quantized method) has been
introduced for some of these models in recent years. In this work, the various
fluid-solid reaction models with their quantized and numerical solutions have
been discussed.
