Optimizations of Sulfolane concentration in propose Sulfinol-M solvent instead of MDEA solvent in the refineries of Sarakhs

• Reduction of circulating solvent MDEA.
• Increasing the sour gas treatment capacity.
• Reduce energy sour gas treatment unit.
• Reducing the waste solvent.
• Reduce corrosion in gas treating unit equipment.

More than 95% of gas refineries are operating through the process of absorption by chemical solvent (amine) to removal the impurities in natural gas such as acid gases (CO2, H2S). Present study addresses the performance of mixture of physical and chemical solvent in Sarakhs gas treatment, one of gas regions containing high contents of acid gases. Gas refinery of this area at present is operating with amine solvent (MDEA)active. This study will examine and estimate the performance of various concentrations of Sulfolane in the Sulfinol-M solvent in this gas refinery. Providing that 40.2% wt Sulfolane, 21.2% wt H2O, 37.7%wt MDEA is used in liquid mixture of Sulfinol-M, treatment of sour gas in this area will better be performed. As well, among the results of this study and other studies are the possibility to relatively change the amounts of water, Sulfolane and MDEA to decrease the energy required for restoration, arriving to the market index, to control the investment cost consistent to the process conditions.