Patent ID: 7160341

Claim:
A temperature control system for controlling temperatures of a shift reactor, comprising: a back end temperature sensor that senses a temperature of a back end of a shift reactor and that generates a back end temperature signal; an actuator that injects fluid into a front end of the shift reactor; a front end temperature sensor that senses a temperature of said front end and that generates a front end temperature signal; and a controller that communicates with said front and back end temperature sensors and said actuator and that controls said temperature of said front and back ends using said front and back end temperature signals, wherein said controller is operatively connected to control the temperature of the front end in accordance with a temperature set point by a primary control loop, and operatively connected to control the temperature of the back end by a secondary control loop having a slower response time than the primary control loop and automatically controlling the temperature set point of the primary control loop based on the temperature of the back end.