Influence of anion and cation on the vapor pressure of binary mixtures of water + ionic liquid and on the thermal stability of the ionic liquid

Improved Methodology for Absorption Measurements in Ionic Liquids with a Quartz Crystal Microbalance

“…With regard to the corresponding average experimental error of about ±0.03 compared to about ±0.1 from Merkel et al, the agreement with literature data [3,4,21] is highly satisfying. For molar fractions of water from 0.7 to 0.9, the deviations may also be due to the different impurities of the employed IL.…”

“…With the help of a more precise humidity sensor, the collected data would be much more accurate. This is also the reason why the small temperature dependence of g H2O reported in literature [3,4,21] could not be measured by employing this sensor. Nevertheless, the quartz crystal microbalance is a powerful and reliable tool kit to obtain vapor-liquid equilibrium (VLE) data over a wide range of the molar fraction of the absorbate because it needs only very small amounts of absorbent.…”

Are Ionic Liquids Suitable as New Components in Working Mixtures for Absorption Heat Transformers?

“…Recently, the performances of binary mixtures {H 2 O + IL} have been evaluated as alternative binary systems in the absorption cycle [16][17][18]19]. Numerous articles present thermodynamic studies of binary systems containing water and IL.…”

“…Table 1 lists the most studied ILs in the literature and the thermophysical properties available. Alkylsulfate-and alkylphosphastebased ILs are well known, and their performance in working fluids {H 2 O + IL} was evaluated in different absorption cycles [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

“…The binary systems {H 2 O + dialkylimidazolium alkylphosphate}, 1-dimethylimidazolium dimethylphosphate, and 1-ethyl-3-methylimidazolium dimethylphosphate were extensively studied in numerous papers, where not only the data of vapor-liquid equilibria (VLE) but also density, viscosity, heat capacity, and excess enthalpy are available [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][27][28][29]. These data make it possible to simulate the performance of these binary mixtures as working fluids in the absorption refrigeration cycle [7-25, 27, 30].…”