Enrichment of 13 C by chemical exchange between CO2 and amine carbamate in nonaqueous solvents

Enrichment of 13 C by chemical exchange between CO2 and amine carbamate in nonaqueous solvent has been mathematically modelled in two ways. The height equivalent to a theoretical plate and steady-state separation, based on two models, have been obtained. If only the isotopic exchange between CO2 gas and amine carbamate solution is considered, the model can estimate the process performance for pressures close to the atmospheric one and room temperature. For process analysis at pressures higher than the atmospheric one and lower temperatures, a two-step model has been used. Using both models the effects of pressure rising have been studied. (authors)