Dissolution single particle, equation

Dissolution rate data for potash alum are plotted in accordance with equations 6.108 and 6.110 with e = 0.95, in Figure 633, where it can be seen that the results lie reasonably close ( 20%) to the predicted values. However, it should be noted that equation 6.110 is very sensitive to values of e as e —> 1, so it cannot be applied with any reliabihty to very lean beds of dissolving particles and certainly not to the dissolution of single particles. 

Sredies of the transport from a particle to a single-phase fluid in a fixed bed have usually been conducted by observing the sublimation of solid particles, the evaporation of a liquid film on tha surface of the particle, or the dissolution of soluble particles. Sherwood et al.M review much of tha available data fior transport from particles to gases or liquids in fixed beds and suggest the) the data can be rep resen led by the equation... 

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