فهرست نشریات علمی دسترسی آزاد ایران

The formation of heat-stable salts (HSS), such as acetate, formate, oxalate, and thiosulfate, in gas-sweetening units creates various issues, including corrosion, high foaming, and reduced unit efficiency. This research aims to investigate eliminating heat-stable salts using an anion-exchange resin. The findings indicated that removing approximately 85% of acetate anion salt from an amine solution at a solution-to-resin ratio of 30 was feasible. Two adsorption models, Langmuir and Freundlich, were employed to analyze the equilibrium adsorption of acetate anion salt. The results indicated that the Langmuir adsorption isotherm aligned more closely with the data obtained from the acetate anion ion exchange process with the resin. Furthermore, it was determined that the maximum adsorption capacity for acetate onto the resin was 15 mg/g at a temperature of 25 °C. The impact of contact time during adsorption was examined using quasi-first-order and quasi-second-order kinetic models and an intra-particle model. The results indicated that the quasi-first-order kinetic model provided the best fit to the data, and equilibrium adsorption was achieved after approximately 70 min. Thermodynamic parameters were also investigated, revealing a ΔH value of –12.7370 kJ/mol, indicating an exothermic adsorption process. Based on the studies, utilizing the selected resin appears to be a suitable option for removing heat-stable salts.