چكيده به لاتين
In this study, amine solvents were used in the presence and absence of activated carbon particles. The performance absorption can be enhanced by applying some solid adsorbents in the liquid phase. This can improve the rate and capacity of separated gas into the liquid phase. This behavior is sometime called shuttle mechanism. The selected solvents in this study include monoethanolamine (MEA) and triethanolamine (TEA). The experimental range is 20-60°C for temperature, 3.5-9.5 Bar for pressure, 2.5-8.5 wt% for solvent concentration and 0.3-0.9 gr/lit avtive carbon content. CO2 loading, the amount of absorption, and absorption percentage were obtained in the range of 0.444-0.720, 0.294-0.687 mol/lit and 19.32-52.25% in MEA, 0.572-1.180, 0.208-0.506 mol/lit and 12.73-32.61% in TEA solutions in the presence of activated carbon particles, respectively. RSM was used in order to analyze the results. In addition, to find the maximum loading and absorption percentage under optimal conditions numerical optimization was used for each solvent. These values are estimated equal to 0.531, 0.609 mol/lit and 50.04% for the MEA solvent, 0.961, 0.504 mol/lit and 25.96% for the, respectively. From the results, carbon dioxide loading in both solvents increases with adding activated carbon particles, and these particles also showed a better effectiveness for MEA solvent than TEA solvent in CO2 absorption. In modeling with MATLAB software based on Pitzer model, the concentration of species in the liquid bulk was calculated by the combination of chemical equilibrium, mass balance and charge balance, which has a similar trend to previous studies. By adding VLE equations, it was possible to predict the CO2 loading by the model, calculated relative error between experimental, and predicted loading is obtained 3.42%-10.73% in MEA solvent, 5.87%-12.23% in TEA.
