The conversion of a second-order reaction in a tubular reactor with axial dispersion,

can be overestimated by replacing the second-order reaction by a first-order reaction using the maximal concentration in the reactor,

where C^IN is the inlet concentration. A better approximation is obtained if C^IN is replaced by the average concentration, calculated from the solution of the first simple approximation with C^IN . Using the average concentration will underestimate the conversion in the first part of the reactor by giving a reaction rate at the inlet that is too low and consequently overestimating the reaction rate in the rear part.

Transcribed Image Text:

Dea d²C dx² dC dx v- - KC² = 0