مدلسازی ترمودینامیکی حلالیت گاز دی‌اکسیدکربن در محلول‌های الکترولیت در فشارهای بالا

The gas injection such as co2 injection is widely used for enhanced oil recovery (eor). moreover, in underground besieging of co2 to decrease greenhouse gases or in the injection of co2 to the underground brine, we face the solubility of this gas in the aqueous salt solutions, so studying the solubility of co2 in aqueous salt solutions in the wide range of concentrations, pressures, temperatures and different electrolytes is very important.in this article, the electrolyte cubic square-well (ecsw) equation of state of haghtalab and mazloumi, fluid phase equilibrium, is used for investigating the solubility of co2 in aqueous binary solutions of the different salts such as nacl, kcl, na2so4, mgso4, mgcl2 and cacl2. the results demonstrate that the ecsw equation is able to obtain the solubility data of ternary aqueous salt electrolyte systems especially nacl in pressures up to 400 bar with very good accuracy.