It is interesting to note the obvious competing forces between different optimisation targets and how two different optimisation targets can lead to widely different designs. Clear examples are the duality between lowest LCOM and highest methanol production in terms of optimal operating pressure and also seen in the slightly different resulting CAPEX and power requirement. Also the duality between the minimum power case and the minimum LCOM case in terms of the widely different applied purge rates is noted. On the other hand, it is noted that the lowest CAPEX, Power and OPEX, are quite similar, since the power requirement has a strong first order effect on both CAPEX and OPEX. Another interesting observation is the fact that the minimum LCOM optimisation also carries penultimate optima from the other cases e.g. the power, OPEX and CAPEX for the LCOM optimal case is not the lowest, but significantly lower than the worst case (MeOH production maximum), the methanol production is not the highest, but still significantly higher than the optimal CAPEX, OPEX and power cases, not far from the MeOH optimal case. Thus, the minimum LCOM is an apparent result of pareto optimality in OPEX, CAPEX and MeOH production.