Rheological, Thermodynamic, and Gas Solubility Properties of Phenylacetic Acid‐Based Deep Eutectic Solvents

Abstract

Choline chloride + phenylacetic acid-based deep eutectic solvents are studied. Their most relevant experimental physicochemical properties at different mixing ratios together with the CO 2 solubility data obtained in wide pressure and temperature ranges are reported. The presented materials exhibit a significant CO 2 capture performance with low corrosion effect when compared with the most common amine-based CO 2 capture agents. Detailed rheological measurements are carried out and various models are applied to describe the dynamic flow behavior of the solvents. The CO 2 absorption mechanism is evaluated by studying the behavior of the liquid gas and interface. Due to the advantages of low cost, nontoxicity, and favorable physical properties, these solvents are an environmentally promising alternative for effective CO 2 capture technological applications.

Gas Solubility and Rheological Behavior of Natural Deep Eutectic Solvents (NADES) via Combined Experimental and Molecular Simulation Techniques

“…Linear behavior of the density values are assured with the experimental temperature variation. Moreover, in Figure , density trends obtained from previous study for DES systems obtained by mixing same HBD, [ChCl], with non‐natural organic acids, levulinic acid ([LAA]) and phenyl acetic acid ([PAA]) compared with the NADES systems studied in this work. It has been observed that the density values obtained from the natural HBD to form NADES systems have caused higher density values.…”

“…It has been observed that the density values obtained from the natural HBD to form NADES systems have caused higher density values. In [ChCl]:[PAA] system the water content was reported as ∼0.8 % and for [ChCl]:[LAA] system the water content was previously reported as ∼1.69 %, which are lower than that of the water content values reported for the studied NADES systems in this work.…”

Gas solubility and rheological behavior study of betaine and alanine based natural deep eutectic solvents (NADES)

“…The results showed that the yield stresses of all NADESs decreased with increasing temperature as expected for the shear thinning materials. The differences in the yield stress values are mainly due to the changes in the interaction forces between the hydrogen bond donor and hydrogen accepter of the NADES and the molecular weight [44,46]. The variations of the yield stress values as a function of temperature is similar to the viscosity data (see Fig.…”

“…Moreover, further calibration was conducted by using dimethyl sulfoxide (DMSO) at various isotherms and experimental results were compared with literature values. Further details on the calibration of the vibrating tube apparatus can be obtained elsewhere [46]. The uncertainty temperature and the pressure measurements in densitometer is ±0.05 K and 0.005 MPa.…”

“…When density profiles and water content rankings are compared, it can be observed that despite lower viscosity of water in comparison to constituents of NADES samples, water could not dominate the system and HBD showed superior effect in the determination of the final density values. InFigure 2, NADES density values and density values for some DES samples, which were obtained via the mixture of ChCl with non-natural organic acids, levulinic acid (Laa)[51] and phenyl acetic acid (Paa)[46], were compared. Density values of NADES that were obtained from the naturally existing HBD have yielded higher density values.…”