Weisz-Hicks criterion

For a non-isothermal catalyst particle according to the Weisz-Hicks criterion no internal heat and mass transport limitations occur if... 

When reaction conditions within the particle are non-isothermal. Weisz and Hicks [8] showed that a suitable criterion defining conditions under which a reaction is not controlled by diffusion and heat transfer effects in the solid is... 

In Sec. 11-7, Eq. (11-59) was developed as a criterion for deciding if intrapellet mass transport had a significant effect on the rate. Weisz and Hicks have extended the analysis to the problem of combined mass and energy transport. For a first-order irreversible reaction the criterion may be expressed as... 

I can do even better than this, I think. Let s see if I can derive an observable criterion for the gas-liquid system corresponding to that of Weisz and Hicks for catalytic reactions (see Figure 7.16). I already have the phase effectiveness from (xii) above, and I know too that I can write the expression for the observable rate of reaction, ( rA), as... 

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