pilot-scale evaluation of co2 loading capacity in amp aqueous solution beside the improvers hmda-nh3 under a series of operational conditions

nowadays, carbon dioxide removal has to be ingeniously managed due to its environmental and health effects. co₂ as a heat-trapping greenhouse gas is pumped into the atmosphere through anthropogenic activities. this specific characteristic of co₂ gas not only adversely impacts the environment but also imposes noxious effects on human life. in spite of all the various and potential scientific technics for co₂ removal, gas absorption using alkanolamines solvents has played a significant role in industries in recent decades. in the present research, the equilibrium set up for measuring co₂ solubility in aqueous solvents was assembled. co₂ loading data in aqueous amp and amp (3m) activated with hmda and nh₃ were assessed under the influence of various operational conditions of co₂ partial pressures (8.44, 25.33, and 42.22kpa), temperatures (303, 313, and 323k) and solvent concentrations of (0.5, 1.5 and 3m) for pure amp and (0.4, 0.8 and 1.2m) for hmda-nh₃. the results show that, for amp activated hmda-nh₃, co₂ loading increased with decreasing system temperature and increasing co₂ partial pressure. furthermore adding the hmda solvent into the pure amp increased co₂ loading before it followed a slight decrease.although, adding nh₃ as an improver into the pure amp decreased co₂ loading. concerning efficiency enhancement, it was comprehended that, hmda could be considered among promising improvers. however nh₃ as an additive beside amp or as a based solvent, promote co₂ absorption characteristics only under specific operational conditions.