Novel liquid–liquid equilibrium data for six ternary systems containing IL, hydrocarbon and thiophene at 25 °C

Mafi, Morteza; Dehghani, Mohammad Reza; Mokhtarani, Babak

doi:10.1016/j.fluid.2015.12.006

Cited by 32 publications

(31 citation statements)

References 24 publications

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“…Figure 6. Solute distribution coefficient as a function of the weight fraction of thiophene in the aliphatic-rich phase for the system {noctane + thiophene + IL or DES} 16,34 Figure 7. Selectivity as a function of the weight fraction of thiophene in the aliphatic-rich phase for the system {n-octane + thiophene + IL or DES} 16,34…”

Section: * S Supporting Informationmentioning

confidence: 99%

Separation of Thiophene from Aliphatic Hydrocarbons Using Tetrahexylammonium-Based Deep Eutectic Solvents as Extracting Agents

et al. 2017

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Section: * S Supporting Informationmentioning

confidence: 99%

Separation of Thiophene from Aliphatic Hydrocarbons Using Tetrahexylammonium-Based Deep Eutectic Solvents as Extracting Agents

et al. 2017

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“…Nevertheless, the dependencies of β and S of DSILs on x are well captured, which validates the suitability of COSMO‐RS for DSILs screening. Moreover, comparing to the recently reported ILs for similar separation systems, the S of the identified DSILs are much higher and their β are also satisfying, indicating their great potential for the thiophene/ n ‐octane separation …”

Section: Methods Application To the Thiophene/n‐octane Separationmentioning

confidence: 53%

Rational design of double salt ionic liquids as extraction solvents: Separation of thiophene/n‐octane as example

Song

Zhou

et al. 2019

AIChE Journal

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Although double salt ionic liquids (DSILs) offer significant advantages over classical twoion ionic liquids as separation solvents, relevant studies are still scarce and a systematic DSIL selection method is thus highly desirable. In this contribution, a rational method for designing DSILs as extraction solvents is proposed and exemplified by the thiophene/ n-octane separation. The effects of additional degrees of freedom for DSIL design (i.e., double cations and/or anions and the ion ratio) on the thermodynamic properties are first analyzed by COSMO-RS. Then, a multilevel DSIL design method combining the prediction of infinite dilution thermodynamic properties, the estimation of physical properties, the evaluation of phase equilibrium behavior, and the experimental validation is proposed. By applying this method, [C 2 MIm][OAc] x [NO 3 ] 1-x (x = [0, 1]) and [C 2 MIm] [OAc] x [SCN] 1-x (x = [0.70, 1]) are identified as promising DSIL solvents for the thiophene/ n-octane separation. Correspondingly, the liquid-liquid equilibria of {DSILs + thiophene + n-octane} with the designed DSILs are experimentally studied. K E Y W O R D S COSMO-RS, double salt ionic liquids, liquid-liquid equilibrium, solvent design, thiophene/ n-octane separation 1 | INTRODUCTION During the past decades, ionic liquids (ILs) have sparked significant interest for application in various separation processes due to their overwhelming advantages over conventional organic solvents, such as negligible vapor pressure, broad liquid range, designable and tunable character, and so on. 1-10 However, as known to all, various cationanion combinations can lead to very different physical and thermodynamic properties, making the selection of ILs the most crucial task for the development of IL-based separation processes. 4-10 A large number of experimental and theoretical studies have been reported on the identification of suitable ILs for different separation processes. 7-25 Particularly, several research groups have employed COSMO-based activity coefficient models 12-19 or the UNIFAC-IL model 20-25 to perform computational screening and design of ILs as separation solvents. Because of the predictive character of these thermodynamic models, the separation performance of ILs that have not been experimentally covered can be estimated and thus the identification of suitable solvent candidates in a large range is possible. Despite the progress made, the selection of practically attractive IL for a specific process is still challenging as in many cases very few ILs can satisfy different desirable properties simultaneously. For instance, when screening ILs as extractive desulfurization solvent, Song et al found that only 831 of the initial 36,260 cation-anion combinations meet the thermodynamic property requirements, among which only 15 satisfy the physical property constraints. 16 Conceivably, if more restrictions such as easy preparation, commercial availability, low cost, and so on of ILs are considered, the number of feasible solvents will be further reduced...

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“…Experimental LLE data in mole fraction and calculated thiophene selectivity (S) and solute distribution ratios (β) for ternary systems [Bmim][NO ](1)+ n-decane(2)+ thiophene(3) at different temperatures and 88KPa. In Figures 7 -8 , the comparison of selectivities and solute distribution ratio for our ILs against mole fraction of thiophene in the n-decane rich phase with previous work are demonstrated [26]. was obtained which causes loss of fuel and consequently higher recycling costs.…”

Section: Experimental Datamentioning

confidence: 65%

Removal of thiophene from model diesel oil with nitrate based ionic liquids at several temperatures

Mafi

Mokhtarani

Dehghani

2016

Journal of Molecular Liquids

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In this work the desulfurization ability of two imidazolium based ionic liquids from n-decane, which is used as a model of fuel, has been developed. The systems of ternary liquid-liquid equilibria containing ionic liquid+ n-decane+ thiophene have been determined at three different temperatures. All systems have been shown the ability of IL's for removal thiophene from ndecane. The selectivity and the solute distribution ratio were calculated for all systems. The data obtained have been correlated with non-random two liquid NRTL model. The phase equilibria diagrams for the ternary mixtures including the experimental and calculated tie-lines have been presented.

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Novel liquid–liquid equilibrium data for six ternary systems containing IL, hydrocarbon and thiophene at 25 °C

Cited by 32 publications

References 24 publications

Separation of Thiophene from Aliphatic Hydrocarbons Using Tetrahexylammonium-Based Deep Eutectic Solvents as Extracting Agents

Separation of Thiophene from Aliphatic Hydrocarbons Using Tetrahexylammonium-Based Deep Eutectic Solvents as Extracting Agents

Rational design of double salt ionic liquids as extraction solvents: Separation of thiophene/n‐octane as example

Removal of thiophene from model diesel oil with nitrate based ionic liquids at several temperatures

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