Design of a Single CSTR

We start the analysis of isothermal CSTRs with single chemical reactions and consider a first-order gas-phase chemical reaction  

We select the inlet stream as the reference stream, = 0, when only reactant A is fed into the reactor, yAo = 1- Using Eq. 3.5.4, the characteristic reaction time is 

The design of CSTRs and the values of calculated quantities (reactor volume, species production rates, etc.) do not depend on the specific reference stream selected. Example 8.2 illustrates the use of a fictitious stream as a reference stream and the behavior of a CSTR when one product is condensable. Example 

3 illustrates the design of a CSTR with a chemical reaction whose rate expression is not a power function of the concentrations. 

Using Eq. 3.5.4, for a first-order reaction, the characteristic reaction time is 

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