Sustainability Assessment of Chemical Processes: Evaluation of Three Synthesis Routes of DMC

Table 3

Process description for Route A.

Process unit	Type	Conditions	Notes
Reac	Stoichiometric reactor	= 50°C, = 150 bar	Conversion of CH3OH = 8.3%
Sep	Component separator	Split fraction of CO2 = 100%	Separation of unreacted CO2
Flash	Flash separator	= 97°C, = 3 bar
Col 1	RadFrac column	15 stages, distillate rate = 1.421, reflux ratio = 5	Separation of methanol
Col 2	RadFrac column	15 stages, distillate rate = 0.07, reflux ratio = 9	Concentration of DMC after distillation = 85.5%
Cond	Cooler	= 20°C, = 1 bar	Cooling of DMC