Thermal stability analysis, experimental conductivity and pH of phosphonium-based deep eutectic solvents and their prediction by a new empirical equation

Ghaedi, Hosein; Ayoub, Muhammad; Sufian, Suriati; Hailegiorgis, Sintayehu Mekuria; Murshid, Ghulam; Khan, Saleem Nawaz

doi:10.1016/j.jct.2017.08.029

Cited by 57 publications

(49 citation statements)

References 51 publications

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“…Another possible reason could be that the structure of TTTM has is a longer alkyl chain length due to AMPD resulting in higher thermal stability. Previously, a similar finding was reported (Ghaedi et al, 2018a;Ghaedi et al, 2017c).…”

Section: Tga Resultssupporting

confidence: 84%

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Potassium carbonate-based ternary transition temperature mixture (deep eutectic analogues) for CO2 absorption: Characterizations and DFT analysis

Ghaedi

Kalhor

Zhao

et al. 2021

Front. Environ. Sci. Eng.

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Is it possible to improve CO2 solubility in potassium carbonate (K2CO3)-based transition temperature mixtures (TTMs)? To assess this possibility, a ternary transition-temperature mixture (TTTM) was prepared by using a hindered amine, 2-amino-2-methyl-1,3-propanediol (AMPD). Fourier transform infrared spectroscopy (FT-IR) was employed to detect the functional groups including hydroxyl, amine, carbonate ion, and aliphatic functional groups in the prepared solvents. From thermogravimetric analysis (TGA), it was found that the addition of AMPD to the binary mixture can increase the thermal stability of TTTM. The viscosity findings showed that TTTM has a higher viscosity than TTM while their difference was decreased by increasing temperature. In addition, Eyring’s absolute rate theory was used to compute the activation parameters (∆G*, ∆H*, and ∆S*). The CO2 solubility in liquids was measured at a temperature of 303.15 K and pressures up to 1.8 MPa. The results disclosed that the CO2 solubility of TTTM was improved by the addition of AMPD. At the pressure of about 1.8 MPa, the CO2 mole fractions of TTM and TTTM were 0.1697 and 0.2022, respectively. To confirm the experimental data, density functional theory (DFT) was employed. From the DFT analysis, it was found that the TTTM + CO2 system has higher interaction energy (|∆E|) than the TTM + CO2 system indicating the higher CO2 affinity of the former system. This study might help scientists to better understand and to improve CO2 solubility in these types of solvents by choosing a suitable amine as HBD and finding the best combination of HBA and HBD.

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Section: Tga Resultssupporting

confidence: 84%

“…Therefore, the addition of AMPD enhanced the thermal stability of TTTM. In the previous work, the result disclosed that the viscosity of the solvent affects its thermal stability (Ghaedi et al, 2018a;Ghaedi et al, 2017c). The hydrogen-bonding interactions have an effect on the thermal stability of solvents.…”

Section: Tga Resultsmentioning

confidence: 96%

Potassium carbonate-based ternary transition temperature mixture (deep eutectic analogues) for CO2 absorption: Characterizations and DFT analysis

Ghaedi

Kalhor

Zhao

et al. 2021

Front. Environ. Sci. Eng.

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“…35 Owing to their composition, DESs have high polarity, which can be evaluated using the E T (30) scale (electronic transition energy of a probe dye in a solvent). 36 Similar data have been obtained for Kamlet and Taft polarity parameters (Table 4) and these also show that all DESs have similarly high values for all parameters. 37 pH While pH is a difficult concept to characterize in non-aqueous solutions a recent study 38 used a classic colorimetric indicator bromophenol blue to quantify the pKa of organic acids in ionic liquids and deep eutectic solvents.…”

Section: Polaritysupporting

confidence: 81%

Deep eutectic solvents: alternative reaction media for organic oxidation reactions

2021

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“…According to the literature review, there are a few theoretical studies in the field of DES-based nanofluids. However, many reports have focused on the analysis of the DES behavior and its characteristics, which are constantly updated [99,[104][105][106][107][108][109][110][111][129][130][131][132][133][134][135][136][137].…”

Section: Theoretical Models For Des-based Nanofluidsmentioning

confidence: 99%

Deep eutectic solvents (DESs): A short overview of the thermophysical properties and current use as base fluid for heat transfer nanofluids

Jafari

Fatemi

Estellé

2021

Journal of Molecular Liquids

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Nowadays, different types of strategies are proposed and tested to find the best scenario for upgrading the productivity of heat transfer fluids, especially nanofluids. Some optimum empirical conditions demonstrated that the best size, shape, and nature of nanoparticles and their appropriate dispersion have positive influences on nanofluid thermal conductivity improvements. Therefore, the specific physicochemical properties of the base fluid can be taken into account as one of the decisive factors in heat transfer operations. Deep eutectic solvents (DESs) are nominated as valuable materials to meet the demands for sustainable ecological processes and open opportunities for overcoming the limitations of conventional fluids.The purpose of this study is to briefly introduce the DESs for evaluating their thermal potential applicability and their use to produce nanofluids. DES-based nanofluids represent a new and creative type of heat transfer fluids that possess high potential in different target applications and are not harmful to the environment. This type of nanofluid has higher thermal properties than the base DESs. Increasing the temperature and the volume fraction of nanoparticles lead to further increment in their thermal properties. In this study, the chemical structure and preparation method have been addressed for the DES and DES-based nanofluids. Also, the theoretical approaches have been considered for modeling and predicting their behavior. A discussion was extended to investigate the usage of DES as host fluid for producing nanofluids, and its advantages and drawbacks are also presented. It is deduced that the DES-based nanofluids are one of the smart choices for the progression of nanofluids and give the most promising results for application in heat transport fluids. The contents may shed light on a detailed awareness of the heat transfer potential of the DESs.

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Thermal stability analysis, experimental conductivity and pH of phosphonium-based deep eutectic solvents and their prediction by a new empirical equation

Cited by 57 publications

References 51 publications

Potassium carbonate-based ternary transition temperature mixture (deep eutectic analogues) for CO2 absorption: Characterizations and DFT analysis

Potassium carbonate-based ternary transition temperature mixture (deep eutectic analogues) for CO2 absorption: Characterizations and DFT analysis

Deep eutectic solvents: alternative reaction media for organic oxidation reactions

Deep eutectic solvents (DESs): A short overview of the thermophysical properties and current use as base fluid for heat transfer nanofluids

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