Chemical engineers are not gentle people, they like high temperatures and high pressures.
—Prof. Steven LeBlanc
Overview. Up to now we have focused on the steady-state operation of nonisothermal reactors. In this chapter the unsteady-state energy balance will be developed and then applied to CSTRs, as well as well-mixed batch and semibatch reactors. We will use the difference between the rate of “heat generated,” , and the rate of “heat removed,” , to arrive at the user-friendly form of the energy balance
• Section 13.1 shows how to arrange the general energy balance (Equation (11-9)) in a more simplified form for unsteady-state operation.