Interpretation:The inlet pressure for given catalyst tower should be determined.
Concept introduction: The pressure drop through the catalyst tower is calculated by the Ergun equation which is a combination of the Kozeny-Carman equation and Burke-Plummer equation.
The Kozeny-Carman equation is applicable for the particles in a bed whose Reynold’s number is less than 1. It is given as,
In the above formula, the notations used are,
The Burke Plummer equation is applicable for the particles in a bed whose Reynold’s number is more than 1000. It is given as,
The density of air can be given as,
In the equation (3), notations used are,
P is the pressure at which air enters
M is the molecular weight of air
R is the Universal Gas constant
T is the temperature at which air enters
Ergun equationis obtained by combining equation (1) and equation (2):
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Unit Operations of Chemical Engineering
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