Details

For the reversible reaction with both reactant and inert component in the adiabatic PFR feed, the equilibrium constant is:

,

where is the equilibrium constant at temperature (K), is the heat of reaction (J/mol), is the ideal gas constant (J/mol K) and is the temperature of the reaction (K).

The equilibrium conversion is obtained from the equilibrium constant, assuming ideal gases:

,

,

where is the equilibrium conversion, is the conversion calculated from the energy balance, is the ratio in the molar flow rate of inert to reactant, is the heat capacity (J/mol K) and is the feed temperature (K).

Reference

[1] H. S. Fogler, Essentials of Chemical Reaction Engineering, Upper Saddle River, NJ: Prentice Hall, 2011 pp. 503–505.