Effects of kinetic constants

The yield also depends on the reaction rate constants or specific reaction rates ( i and 2)5 and therefore depends on the reaction temperature. According to Arrhenius, the ratio between these constants is  

The effect of temperature depends on the activation energy of each reaction. If both energies are equal, the ratio depends only on the ratio between the frequency factors 021- If E2 El, then we have the difference (E2 — Ei) = AE 0, and thus the exponential term. 

3 Let us consider a system with two irreversible decomposition reactions at constant volume. The first one is a second-order reaction while the other is a first-order reaction, as in the following rate expressions  

This reaction may be carried out in PER and CSTR reactors separately. Calculate the local and overall yields as a function of outlet concentration in the reactor, considering the same space velocity and constant temperature. Obtain the yield and selectivity to the desired product R from the first reaction. 

We define x = kiC o parameter that relates the two kinetic constants. The CSTR overall yield is equal to the local yield and thus  

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