Other Reactions in a CSTR

Detailed transient studies and plots such as these must be done whenever one is interested in designing a nonisothermal reactor to determine how startup and shutdown transients might cause unacceptable transient conditions in the reactor. 

We have as usual examined an almost trivial example, the first-order irreversible reaction. We did this because the math is simple and we could easily see what can happen. For more complex examples the equations become more difficult to solve. 

Consider 2A products or A S products with Cao Cbo for rate r The mass-balance equation now becomes 

The heat removal line is of course unchanged no matter what the kinetics, and X(T) has a qualitatively similar sigmoidal shape for second-order kinetics. We could continue this for any order irreversible reaction, and the solutions would be qualitatively similar, although 

Therefore, we can generalize the previous discussion to say that aU qualitative features of multiple steady states in the CSTR remain unchanged for the nth-order irreversible reaction as long as is obeys positive-order kinetics. We will consider zeroth-order and negative-order kinetics in problems. 

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