Pressure drop in reactors

Pressure drop is ignored for liquid-phase kineiks calculations 

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Effect of Pressure Drop in Reactor (Forced Flow through Catalyst... 

The calculation of pressure drop and pressure variation in reactors can be a difficult problem, particularly if a change of phase occurs or more than one phase is present. Although this effect is often small and/or can be neglected (particularly if the reactor is already under pressure), the reader should become familiar with the methods of calculating pressure drop in reactors. The literature provides information for these calculations Fanning s equation may be used to calculate pressure drop for homogenous reactions, while Ergun s equation is normally employed for fixed-bed reac-tors. The mass of the catalyst divided by the cross-sectional area of the reactor... 

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