2.7.7 Larsson, Hestetun and Skogestad’s solution
Larsson, Hestetun and Skogestad (in Chapter 6) uses the concept of self-optimizing control
for selecting the controlled variables. This problem is well suited since the economic objective was defined. However this problem is larger in size, and they needs to use process insight to reduce the number of alternative structures. For example, they choose to control reactor temperature since everybody else does it. Still they manage to come up with a solution with good self-optimizing properties.