Vapor pressures and thermophysical properties of selected ethanolamines

Abstract

a b s t r a c tA thermodynamic study of three ethanolamines, 2-(diethylamino)ethanol, 2-(ethylamino)ethanol and 2-(isopropylamino)ethanol, reporting the measurements of vapor pressure, liquid phase heat capacities, and phase behavior is presented in this work. The vapor pressures were measured using a static method in the temperature interval 238e343 K. After a critical assessment of literature data, selected experimental data were correlated using the Cox equation. The liquid phase heat capacities were measured in the temperature range 265e355 K using Tian-Calvet calorimetry and the phase behavior was investigated using differential scanning calorimetry (DSC) starting from 183 K. For 2-(ethylamino)ethanol and 2-(isopropylamino)ethanol, two monotropically related crystalline forms were identified. To our knowledge, vapor pressure and heat capacity for 2-(isopropylamino)ethanol and phase behavior data for 2-(ethylamino)ethanol and 2-(isopropylamino)ethanol are reported for the first time in this work.

Calculation of the Isobaric Heat Capacities of the Liquid and Solid Phase of Organic Compounds at 298.15K by Means of the Group-Additivity Method

“…A number of new experimental C p data have been published for saturated and unsaturated hydrocarbons, especially for bicyclo [ [14], and adamantane [15]. In addition, further C p values have been found for the amines hexamethylenetetramine [15], tetra-N-phenylbenzidine and 4,4 -bis (N-carbazolyl)-1,1 -biphenyl [16], 1,3,5-triazine [17], the ethers 1,3,5-trioxane [17], diethylene glycol n-pentyl ether [18], triethylene glycol monopentyl ether [19] and diphenyl ether [20], several alcohols and aldehydes [21], derivatives of glycidol [22], carboxylic acids [23,24], aliphatic esters [24][25][26][27], benzoates [28], haloalkanes [29,30], haloaromatics [31,32], thio ethers, sulfones and sulfoxides [33,34], alkanolamines, [35][36][37] and nitriles [38] For several compounds, more recent publications have been found the following: 4-ethylmorpholine [39], methionine [40], theophylline, and caffeine [41], as well as for (-)-menthone, (+)-pulegone, and (-)-isopulegol [42]. Beyond these, experimental C p values of a number of new compounds have been published: namely 3-amino-4-amidoximinofurazan [43], 3-fluoro-5-(3-pyridinyloxy)-benzenamine and N- [46], eugenol and (+)-carvone [47], indapamide [48], and the explosives EDNH and DNTA [49].…”

Molecular Layer Deposition of Organic–Inorganic Hafnium Oxynitride Hybrid Films for Electrochemical Applications

“…The mid-IR absorption of the as-deposited Hf-based hybrid MLD thin film is shown in Figure a. In this FTIR spectrum, the absorbances at 1076 and 1042 cm –1 correspond to C–N and C–O stretching from the EA structure, respectively. − Peaks from 1300–1730 cm –1 correspond to −CH 2 bending vibrations and the NH 2 scissoring mode from some unreacted NH 2 groups from the EA linker. Because this measurement is collected ex situ , peaks around 1600 cm –1 may also be attributed to the formation of oxidized species such as carboxylates that arise during exposure to ambient.…”

New Solvents for CO2 and H2S Removal from Gaseous Streams

“…Concerning the DEEA-MAPA blend, a detailed physicochemical characterization is available in the literature, including vapor pressure, density, viscosity, specific heat and vaporization enthalpy data [60][61][62]64,65], Henry's constant data [63], vapor-liquid equilibrium data [67][68][69][70], free enthalpies and Gibbs free energy of formation [71] and kinetic mechanism and global reaction rate constant [72]. Several pilot plant tests have been successfully carried out with a blend of 2M MAPA + 5M DEEA at Technology Centre Mongstad (Mongstad, Norway) in the Gløshaugen (NTNU/SINTEF) pilot plant [20].…”