چكيده به لاتين
In this work, equilibrium solubility of CO2 absorption in different blends of amines is examined; these amines are methyldiethanolamine (MDEA), N,N-Dimethylaminoethanol (DMAE), N,N-Diethylaminoethanol (DEAE), 2-(2-Aminoethylamino)ethanol (AEEA), and 3-Methylamino propylamine (MAPA). New equilibrium solubility data for CO2 absorption in aqueous solutions of MDEA + AEEA, DMEA +MAPA, DMEA + AEEA, DEAE + MAPA, and DEAE + AEEA over low range of pressure is obtained. The concentration of MDEA/DMAE/DEAE is 40 wt.% and AEEA/MAPA is 5 wt.% in each solution. The CO2 loading was measured in the range of 0.07 to 0.97 (mol CO2/mol amine) and experimental temperature was set to 313.15 K. In order to make a better comparison, viscosity and density of these amine solutions were also measured at temperatures 313.15 to 353.15 K. Experiments show that DMAE + MAPA blend has the highest absorption capacity, and at the same time, its viscosity and density are in a desirable range. Complementary equilibrium solubility data for DMAE + MAPA is also obtained in temperature range of 313 K to 358. Also heat of reaction is measured for this solution in 328 K . Finally this system is modelled by Deshmukh-Mather and results are compared with experimental equilibrium solubility data and heat of CO2 absorption; which results showed that this model can predict solubility data reasonably and it also can calculate the heat of reaction relatively well.