A The Simulation or Design of

Let the kinetic equation of the reaction occurring in the liquid phase be 

The concentration profiles in the liquid film and the uniform concentrations in the bulk at a given height in the column depend on a number of factors conveniently grouped into the Hatta number, as extended by Hikita and Asai [1966]  

Hatta numbers smaller than 0.3 are encountered with very slow reactions. Eor moderately fast reactions, Ha is comprised between 0.3 and 3, whereas for very fast reactions, Ha exceeds 3. The most general case is that where the reaction takes place in both the film and the bulk, that is, when 0.3 Ha 3 and the reaction is only moderately fast. 

The continuity equation for A in the gas phase, assumed to be in plug flow, may be written 

When the mole fraction of A in the gas phase is relatively high, the variation of the total molar flow has to be accounted for  

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