Thesis (M.Eng.)--Chulalongkorn University, 2015

Carbon dioxide (CO2) causes the global issues on climate change and global warming. The sources of CO2 are from fossil fuel power plants. The chemical absorption by aqueous amine solution of amino ethanol of 2-(Diethylamino)ethanol (DEAE), 2-(Dimethylamino)ethanol (DMAE) and 2-(Methylamino)ethanol (MAE) are promising method to remove CO2 from fuel gases. Measurement of density and viscosity are the fundamental data for designing and modeling the absorption process. The objectives of this study are (1) to measure the density and viscosity of aqueous amino ethanol solutions and evaluate the effect of mole fraction and temperature on density and viscosity of amines. (2) to develop the correlation for prediction the data in the future. And (3) to investigate the effect of the various function groups attached to back-bone of amino ethanol. The results for the densities of DEAE, DMAE and MAE decrease with an increase of mole fraction and temperature. Also, the viscosities of all of the range of mole fraction of DEAE, DMAE and MAE decrease as temperature increases up to mole fraction of 0.4, 0.4 and 0.6, respectively and becomes lower. Moreover, the correlations by Redlich-Kister equation is the most suitable model which have been developed to represent the data and predict the data for equipment design. This equation gave the lowest percent absolute deviation (%AAD). The %AAD of density of DEAE, DMAE and MAE is 0.1590%, 0.0112% and 0.0261%, respectively. The %AAD of viscosity of DEAE, DMAE MAE is 1.9413%, 2.0312%, 1.4912, respectively.