1. Establish control objectives.
2. Determine the control degrees of freedom by counting the number of independent
valves.
3. Establish energy inventory control, for removing the heats of reactions and to prevent
propagation of thermal disturbances.
4. Set production rate. The production rate can only be increased by increasing the reaction
rate in the reactor. One recommendation is to use the input to the separation
section.
5. Product quality and safety control. Here they recommend the usual “pair close”-rule.
6. Inventory control. Fix a flow in all liquid recycle loops. They state that all liquid levels
and gas pressures should be controlled.
7. Check component balances. (After this point it might bee necessary to go back to item
4.)
8. Unit operations control.
9. Optimize economics or improve dynamic controllability.