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Gas sweetening is one of the important purification processes which is employed to remove acidic contaminants from natural gases prior to meet transport requirements and sale gas specifications. In this work, simulation and parametric studies of the natural gas processing plant of  Missan Oil Company / Buzurgan Oil Field of Natural Gas Processing Plant  (in Iraq) were considered. After simulation and validation of this plant, the effect of feed temperature and flow rate and solvent concentration were considered. Results show with increasing the feed temperature and flow rate, the amount of H 2 S and CO 2  in the sweet gas stream increases. Then, in the next step, the effect of mixture solvents was studied. Sulfolane–MDEA and MDEA–MEA were selected as a physical–chemical mixture solvent and chemical mixture solvent, respectively. The simulation results show that the solvent price and reboiler duty and cooling duty can be reduced by using a mixture solvent. However, the amount of H 2 S and CO 2  in the sweet gas can be affected by these solvents. The system by a chemical mixture solvent can better performance than other solvents.

Simulation and parametric analysis of natural gas sweetening process: a case study of Missan Oil Field in Iraq