Vapor Pressures of the Ethylamine + Water + Lithium Bromide System and Ethylamine + Water + Lithium Nitrate System

Abstract

Vapor pressures of the ethylamine + water + lithium bromide (H 2 O:LiBr ) 2:1 mass) system and the ethylamine + water + lithium nitrate (H 2 O:LiNO 3 ) 2:1 mass) system were measured by a boiling point method at temperatures from 296.25 K to 318.25 K and at ethylamine concentrations from 4.8 to 59.4 mass %, and at temperatures from 296.35 K to 316.25 K and at ethylamine concentrations from 4.8 to 64.0 mass %, respectively. The experimental vapor pressure data for these ternary systems were fitted to an Antoine-type equation. The calculated values from these equations for vapor pressures of two ternary systems were in good agreement with the experimental vapor pressure data.

Heat Capacities of Ethylamine + Water + Lithium Bromide from 313.15 K to 373.15 K

“…Thermophysical properties (density, viscosity, surface tension, solubility, vapor pressure, vapor-liquid equilibrium, heat capacity, and enthalpy of mixing) for the working fluids are necessary for the simulation of performance and the design of absorption refrigerating machines, absorption heat pumps, and absorption heat transformers. In our previous paper, the vapor pressure data (Iyoki et al, 1998) of this ternary system were reported. Heat capacities of ethylamine + water + lithium bromide were measured using a twin isoperibol calorimeter, devised for high-pressure measurements, at various temperatures and ethylamine concentrations.…”

Vapor Pressure Measurement of Ternary Systems LiBr + [Emim]I + H2O and LiBr + [Dmim]I + H2O

“…However, it is corrosive and easy to crystallize in high concentrations of LiBr. In order to improve the performance of H 2 O + LiBr, a lot of research studies have been dedicated to studying the potential of adding a third component as an additive in H 2 O + LiBr aqueous solution, thus forming different ternary or quaternary mixtures with lower vapor pressure, such as H 2 O + LiBr + LiI, H 2 O + LiBr + LiNO 3 , H 2 O + LiBr + ZnBr 2 , H 2 O + LiBr + ZnCl 2 + CaBr 2 , and so forth. − …”

“…For example, ethylamine was proposed as an additive in aqueous lithium bromide. , Vapor liquid equilibria properties of H 2 O + LiBr + [C 6 H 11 N 2 ]­HSO 4 have been measured and compared with corresponding binary systems . Sodium formate and potassium formate were proposed, and the vapor pressure of H 2 O + LiBr + CHO 2 Na (LiBr/CHO 2 Na mass ratio = 2) and H 2 O + LiBr + CHO 2 K (LiBr/CHO 2 K mass ratio = 2) was measured.…”

Vapor Pressure Measurement for the Ternary System of Water, Lithium Bromide, and 1-Ethyl-3-methylimidazolium Acetate

“…In that context, researchers have focused on additives to improve the performance of working fluids. Iyoki et al − have conducted a series of experiments on LiBr aqueous solution plus organic amine or inorganic salts since 1989. Ethanolamine was selected as an additive to lithium bromide aqueous solution by Kim et al , in 1996, and properties of the ternary system turned out to be better than the original system.…”