US EPA

2116242 

Journal Article 

Vapor pressures of aqueous blended-amine solutions containing (TEA/AMP/MDEA) + (DEA/MEA/PZ) at temperatures (303.15a343.15) K 

Wu, SH; Caparanga, AR; Leron, RB; Li, MHui 

2013 

Yes 

Experimental Thermal and Fluid Science
ISSN: 0894-1777 

Elsevier B.V., The Boulevard Kidlington Oxford OX5 1GB United Kingdom 

48 (Jul 1 

1-7 

In this study, a new set of data on the vapor pressure of aqueous blends of the most industrially important amines monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), methyldiethanolamine (MDEA), 2-amino-2-methyl-1-propanol (AMP), and piperazine (PZ) were presented. The blended-amines systems are mixtures of (TEA/AMP/MDEA) + (MEA/DEA/PZ), at total amine concentration = 30 wt% (10 wt% amine 1 + 20 wt% amine 2). Experimental data were obtained at atmospheric pressure and temperatures (303.15a343.15) K using a vapor pressure measurement apparatus. The apparatus consisted mainly of a degassing system and a vapor pressure measurement setup where the equilibrium experiment was performed. The vapor pressures of aqueous solutions of each of the six single-amine systems were also presented. Results showed that the addition of amine in water lead to the lowering of the vapor pressure. The vapor pressure increased with increasing temperature, and decreased with increasing mole fraction of amine in the solution. The vapor pressure data were correlated with temperature using the reliable Antoine equation, which yield an average absolute deviation of 0.09% for the aqueous single-amine systems, and 0.13% for the aqueous blended amine systems. The results presented in this work can be applied in engineering design calculations to have reliable vapor pressure estimates for the investigated amine systems in the temperature range (303.15a343.15) K. 

Deviation; Amines; Tea; Mathematical analysis; Vapor pressure; Diethanolamines; Methyldiethanolamine; Blends; 2013)