The recycle plant discussed in this chapter utilizes a composition-only model; that is, thermal effects are neglected. Appendix B contains equations and parameters that can be used to model temperature effects in the reactor. Implement the cooling coil equations for the reactor and, using the cooling water flow rate as manipulated variable, design a PI controller that will control reactor temperature. Test your plant’s response to a step change in reactor feed flow rate using any of the control structure alternatives discussed in this chapter. What can you conclude regarding the effect of a well-tuned controller for reactor temperature on the responses of the other system variables such as F and D?