Inlet pressure to the first reactor: 57.8 bar, Inlet temperature to the first reactor: 183.6☌, Inlet pressure to the second reactor: 102.6 bar, Outlet temperature of the liquid stream cooler after the second reactor: 63.5☌, Inlet temperature to the first distillation column: 51.8☌. The obtained minimum methanol production cost was $565.54 per ton produced methanol with the optimal operating conditions as follows. The results showed RSM was successfully applied to the methanol production via CO 2 hydrogenation process. Response surface methodology coupled with non-linear programming solver were used as the optimization tool. The sensitivity analysis was performed to determine the parameters that show significant impacts on the methanol production cost. The objective of this optimization was to minimize the methanol production cost per tons produced methanol. This paper studied an application of response surface methodology (RSM) in optimization of methanol production via CO 2 hydrogenation. To make methanol production via CO 2 hydrogenation a competitive process, the optimal operating conditions with minimum production cost need to be considered.

One of studies to mitigate CO 2 emissions to the atmosphere is to convert CO 2 to valuable products (i.e., methanol). Department of Chemical Engineering, Suranaree University of Technology, Nakhon Ratchasima, ThailandĬarbon dioxide (CO 2) is one of greenhouse gases, which can cause global warming.Prapatsorn Borisut and Aroonsri Nuchitprasittichai *

Methanol molecule diameter