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 because of 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 result showed that CO2 loading of AMP activated HMDA-NH3 increases with decreasing system temperature and increasing CO2 partial pressure. Furthermore adding the HMDA solvent into the system increased CO2 loading before it followed a slight decrease while adding NH3 decreased the amount. Concerning efficiency enhancement, it was comprehended that, HMDA could be considered among promising improvers while NH3 as an additive beside AMP or as a based solvent, perform well in CO2 absorption process only under specific operational condition.

Keywords:

CO2 solubility , AMP , Ammonia (NH3) , Loading