For the DME process shown in Figure B.1.1, complete a parametric optimization for both columns when the

Question:

For the DME process shown in Figure B.1.1, complete a parametric optimization for both columns when the order of separation is reversed. This means that the first column will remove water as a bottoms product and the second column will separate DME from methanol. The approach used in Problem 14.15 should be followed here, with pressure and reflux ratio used as the independent variables and NPV as the objective function. Compare the results from Problem 14.15 with your results from this problem to determine which separation sequence for the DME process is better.

Problem 14.15

Perform a parametric optimization for the second distillation column, T-202, in the DME process, Figure B.1.1, using reflux ratio and pressure as the independent variables and NPV as the objective function. You should follow the approach used in Section 14.4.2, which considered the first column, T-201, for this process. V-201 E-201 E-206 T-202 E-207 V-203 P-203A/B E-208 E-203 T-201 E-204 E-205 V-202 P-202A/B Methanol DME DME