In this study, newexperimental data was obtained for the solubility and absorption rate of carbon dioxide in 2, 3 and 4M of 4-Hydroxy-1-methylpiperidine (HMPD) aqueous solution and the effect of addition of 0.5 and 1.5M aminoethylethanolamine (AEEA) on it. Experimental data was measured in a bath reactor within the temperature range of 303.15–373.15K and pressure range of 28.3–1980.3kPa. The solution viscosity was measured at different temperature and concentration conditions. Response surface methodology (RSM) was used for modeling and optimization of the CO2 loading and absorption rate. The results of RSM showed that AEEA concentration and partial pressure of CO2 have the maximum impact onabsorption rateandCO2 loading, respectively.Themaximumabsorption rateandCO2 loadingoccurred at2M HMPD+1.35M AEEA in 320.15K and 1980.3 kPa. The measured experimental values revealed that HMPD + AEEA solution has a more desirable absorption rate, CO2 loading and oxidative degradation in comparison to methylediethanolamine(MDEA) + piperazine(PZ) aqueous solution.
