The aim of this paper is to determine the influence of desulphurization on process efficiency and monoethanolamine (MEA)
absorption capacity. The experiment was conducted on a circulating fluidized bed combustion (CFBC) which uses indigenous coal
from Jiu Valley. We determined the absorption capacity of MEA considering three values of concentrations in the solution: 20%,
30% and 40%. It was noticed that the higher the concentration of MEA is in the solution, the greater is the influence in the efficiency
of the desulphurization process on the absorption capacity of MEA. Therefore, the increase in the efficiency of the desulphurization
process from 68 to 98% leads to the increase of the amount of CO2 rich loading solvent by 0.172 g CO2/gMEA for a concentration
of 20% and by 0.25g CO2/gMEA for a concentration of 40%. Considering an optimal desulphurization (1 % NaOH), the efficiency
of the CO2 capture process was of 85% irrespective of the MEA concentration in the solvent. However, the minimum energy
consumption is obtained for the optimal concentration of 40% (3 GJ / tonne of CO2).