Irreversible first-order reaction at constant volume

1 Irreversible first-order reaction at constant volume 

Therefore, substituting the rate expression into PFR (16.3) and CSTR (16.2) equations and integrating, we obtain respectively  

For the same volumetric feed flow, the space times are directly proportional to the corresponding volumes. The ratio between CSTR and PFR volumes considering 

For conversions below 20%, the volumes have same order of magnitude, not varying more than 15%. Calculating the ratio, 

However, for conversions above 50%, the CSTR and PFR volumes differ significantly. For a conversion Xa = 0.80, this ratio is 2.5. Therefore, the CSTR volume is 2.5 times larger than the PFR volume. 

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To illustrate the procedure, consider an irreversible first-order reaction at constant volume, where... 

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