Density, transport properties and electrochemical potential windows for the 2-hydroxy-N,N,N-trimethylethanaminium chlorides based ionic liquids at several temperatures

Constantin, Virgil; Adya, Ashok K.; Popescu, Alina

doi:10.1016/j.fluid.2015.03.025

Cited by 27 publications

(11 citation statements)

References 27 publications

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“…For the cyclic voltammetry measurements AgCl and AuCl (99.9%, Sigma Aldrich) reagents were used as precursors of Ag + and Au + ions, being dissolved easily in the supporting electrolyte ChCl-EG. The density value of ChCl-EG of 1.09 gcm -3 determined in our laboratory at 343 K [17][18][19] was used in order to calculate the solution molarities.…”

Section: Experimental Partmentioning

confidence: 99%

Recovery of Silver and Gold From Electronic Waste by Electrodeposition in Ethaline Ionic Liquid

Popescu¹,

Soare²,

Demidenko³

et al. 2020

Rev. Chim.

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The recycling of metals from electronic equipment waste (e-waste) is of great concern today. The work described in the article focuses on the application of ionic liquids (ILs) to selectively recover of precious metals (Ag and Au) from the anodic slime obtained at the anodic dissolution of cast ewaste. The ingots obtained from molten and cast anodic slime were selectively dissolved in ILs. Silver and gold compositions of the ingots: 39.7 wt.% and respectively 18.9 wt.%. The IL used was an eutectic mixture of choline chloride with ethylene glycol in a 1:2 molar ratio. As catalytic/oxidizing agent, there was used pure iodine in a concentration of 0.1-0.2 moldm -3 at 298-303 K. Cyclic voltammetry was employed for the determination of the electrochemical windows of ILs as well as of the dissolution and electrodeposition potentials of principal metals present in the ingot (anode). For Ag and Au, the deposition potentials determined were 0.074 V and respectively 0.696 V. The XRD and SEM-EDX analyses revealed that the content of precious metals in the cathodic deposits was 99 wt.% for Ag and respectively >70 wt.% for Au. We demonstrated that ILs electrolytes could be a solution to selective recovery of precious metals from e-waste.

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Section: Experimental Partmentioning

confidence: 99%

Recovery of Silver and Gold From Electronic Waste by Electrodeposition in Ethaline Ionic Liquid

Popescu¹,

Soare²,

Demidenko³

et al. 2020

Rev. Chim.

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“…Density is commonly used for the calculation of thermal expansion coefficient, α, the molecular volume, V m , and the lattice energy, U pot (see Supplementary material). 27,30 The calculated values of V m , U pot and the heat capacity (C p ) from equations from the literature 27,30 at 303.15 K are presented in Table S--III of the Supplementary material. The values for lattice energy are similar to those of molten salts; for instance, the fused CsI 31 has the lowest lattice energy among the alkaline halides (613 kJ mol -1 ).…”

Section: Effect Of Temperature On Density Of the Chcl-based Dessmentioning

confidence: 99%

“…For better understanding of the viscous flow, the Eyring's transition state theory is commonly used for calculating the thermodynamic functions of activation from the dynamic viscosity. Usually, the following equation is used to calculate the activation enthalpy change (ΔH * ) and entropy change (ΔS * ) of viscous flow: 27…”

Section: Effect Of Temperature On Dynamic Viscosity Of the Chcl-based Dessmentioning

confidence: 99%

The physicochemical and thermodynamic properties of the choline chloride-based deep eutectic solvents

Troter

Todorović

Đokić-Stojanović

et al. 2017

JSCS

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This paper reports the physicochemical (density, dynamic viscosity, electrical conductivity and refractive index) and the thermodynamic (thermal expansion coefficient, molecular volume, lattice energy and heat capacity) properties of several choline chloride (ChCl) based deep eutectic solvents (DESs), with 1:2 mole ratio, respectively: ChCl:propylene glycol, ChCl:1,3-dimethylurea and ChCl:thiourea, at atmospheric pressure as a function of temperature over the range of 293.15?363.15 K. Their properties were also compared with those of some already characterized ChCl-based DESs, namely ChCl:ethylene glycol, ChCl:glycerol and ChCl:urea (1:2 mole ratio). Density, viscosity and refractive index of all DESs decrease with the increasing temperature while the electrical conductivity increases. Viscosity and conductivity of the tested DESs were fitted by both Arrhenius-type and Vogel?Tamman?Fulcher equations. The changes of molar enthalpy, entropy and Gibbs energy of activation, determined using the Eyring theory, demonstrated the interactional factor as predominant over the structural factor for all DES systems. The fractional Walden rule, used to correlate molar conductivity and viscosity, showed an excellent linear behaviour. It was shown that ChCl:propylene glycol DES had properties similar to ChCl:ethylene glycol and ChCl:glycerol DESs. However, the properties (density, viscosity and electrical conductivity) of ChCl:1,3-dimethylurea and ChCl: :thiourea DESs were inferior to those of the ChCl:urea DES. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. III 45001]

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“…The LEC:G DES has a significantly higher density than the DESs with G, such as the N,N-diethylethanolammonium chloride:G (1:2) [29], tetrapropylammonium bromide:G (1:3) [30], ChCl:G (1:2) DESs [27,31,32] because LEC has the larger molecular mass than the other hydrogen bond acceptors [28]. For the same reason, the density values for the LEC:TEOA DES are higher than those reported for the ChCl:TEOA (1:2) [33] and ChCl:TEOA (1:1) DESs [25].…”

Section: Resultsmentioning

confidence: 99%

“…Expansion of DESs with temperature is best quantified by the thermal expansion coefficient (α), which is obtained as a slope of the ln ρ-T linear fit of Eq. ( 2) [25]:…”

Section: Resultsmentioning

confidence: 99%

Effects of temperature on physicochemical properties of the lecithin based deep eutectic solvents and their use in the CaO-catalyzed transesterification

Todorović

Djordevic

Troter

et al. 2023

Hem Ind

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Deep eutectic solvents (DESs) are called 'designer solvents' due to various structural variations and the benefit of tailoring their physicochemical properties. For industrial applications of DESs it is crucial to know their physical and thermodynamic properties such as density, viscosity, and refractive index. These properties were measured for three lecithin (LEC)-based DESs with glycerol (G), triethanolamine (TEOA), and oleic acid (OLA) as functions of temperature. The viscosity was fitted by both Arrhenius-type and Vogel-Tamman-Fulcher equations. The density, viscosity, and refractive index of tested DESs decreased with the increase in temperature. The LEC:G DES exhibited the lowest density at all tested temperatures. This DES was selected as a cosolvent in the ethanolysis of cold-pressed black mustard (Brassica nigra L.) seed oil catalyzed by either calcined or non-calcined CaO. The reaction was carried out in a batch stirred reactor under the following conditions: the temperature of 70?C, the ethanol-to-oil molar ratio of 12:1, and the amount of DES and CaO of 20 and 10 wt.% (to oil), respectively. The presence of DES accelerated the reaction, while the separation of the final reaction mixture phases was faster.

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Density, transport properties and electrochemical potential windows for the 2-hydroxy-N,N,N-trimethylethanaminium chlorides based ionic liquids at several temperatures

Cited by 27 publications

References 27 publications

Recovery of Silver and Gold From Electronic Waste by Electrodeposition in Ethaline Ionic Liquid

Recovery of Silver and Gold From Electronic Waste by Electrodeposition in Ethaline Ionic Liquid

The physicochemical and thermodynamic properties of the choline chloride-based deep eutectic solvents

Effects of temperature on physicochemical properties of the lecithin based deep eutectic solvents and their use in the CaO-catalyzed transesterification

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