Pilot plant study on the extractive distillation of toluene–methylcyclohexane mixtures using NMP and the ionic liquid [hmim][TCB] as solvents

Quijada‐Maldonado, E.; Meindersma, G.W.; Haan, A.B. de

doi:10.1016/j.seppur.2016.04.041

Cited by 27 publications

(14 citation statements)

References 21 publications

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“…Figure 9. Liquid phase viscosity inside the ED column and HETP for the system toluene-methylcyclohexane using both solvent NMP and [hmim][TCB] [38].…”

Section: Discussionmentioning

confidence: 99%

“…Heat and Mass Transfer -Advances in Modelling and Experimental Study for Industrial Applications Figure 2. Scheme of the extractive distillation pilot plant at Eindhoven University of Technology [38].…”

Section: Parameter Valuementioning

confidence: 99%

“…Ternary diagram for the system toluene-methylcylcohexane-[hmim][TCB][38].Heat and Mass Transfer -Advances in Modelling and Experimental Study for Industrial Applications 118…”

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confidence: 99%

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Mass Transfer in Extractive Distillation when Using Ionic Liquids as Solvents

Quijada‐Maldonado¹,

Meidersma²,

deHaan³

2018

Heat and Mass Transfer - Advances in Modelling and Experimental Study for Industrial Applications

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Mass transfer efficiency study in extractive distillation with ionic liquids for the mixtures water-ethanol and toluene-methylcyclohexane has been carried out in this work. Ionic liquids for the separation of these mixtures overcome the performance of the common volatile organic solvents. However, these also showed higher viscosities. A rated-based analysis was performed in order to quantify the effect of the solvent viscosity and relative volatility on mass transfer efficiency. In addition to this, an experimental analysis of the mass transfer efficiency was carried out experimentally in an extractive distillation pilot plant. The results indicated that, high liquid viscosities of ionic liquids should not affect the mass transfer efficiency negatively if the produced relative volatilities are sufficiently higher than those produced by organic solvents. However, when the ionic liquid showed very high viscosities or this solvent was present in large concentrations inside the column, the mass transfer efficiency decreases no matter how high the relative volatility is.

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“…Figure 9. Liquid phase viscosity inside the ED column and HETP for the system toluene-methylcyclohexane using both solvent NMP and [hmim][TCB] [38].…”

Section: Discussionmentioning

confidence: 99%

Section: Parameter Valuementioning

confidence: 99%

See 1 more Smart Citation

Mass Transfer in Extractive Distillation when Using Ionic Liquids as Solvents

Quijada‐Maldonado¹,

Meidersma²,

deHaan³

2018

Heat and Mass Transfer - Advances in Modelling and Experimental Study for Industrial Applications

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“…This is of great importance at high entrainer-to-feed ratios where liquid viscosities increase and can become a limiting factor for mass transfer (Weiss and Arlt, 1987). In addition, the physical and transport properties: density, viscosity and surface tension at various temperatures are needed for predicting the mass transfer efficiency (Quijada-Maldonado et al, 2016). Kumar et al (1984) seems among the first authors to publish experimental data of extractive distillation.…”

Section: Experimental Workmentioning

confidence: 99%

Review of extractive distillation. Process design, operation, optimization and control

Gerbaud

Rodríguez-Donis

Hégely

et al. 2019

Chemical Engineering Research and Design

190

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Operation and control Extractive distillation processes enable the separation of non-ideal mixtures, including minimum or maximum boiling azeotropes and low relative volatility mixtures. Unlike azeotropic distillation, the entrainer fed at another location than the main mixture induces an extractive section within the column. A general feasibility criterion shows that intermediate and light entrainers and heterogeneous entrainers are suitable along common heavy entrainers. Entrainer selection rules rely upon selectivity ratios and residue curve map (rcm) topology including univolatility curves. For each type of entrainer, we define extractive separation classes that summarize feasibility regions, achievable products and entrainer-feed flow rate ratio limits. Case studies are listed as Supplementary materials. Depending on the separation class, a direct or an indirect split column configuration will allow to obtain a distillate product or a bottom product, which is usually a saddle point of rcm. Batch and continuous process operations differ mainly by the feasible ranges for the entrainer-feed flow rate ratio and reflux ratio. The batch process is feasible under total reflux and can orient the still path by changing the reflux policy. Optimisation of the extractive process must systematically consider the extractive column along with the entrainer regeneration column that requires energy and may limit the product purity in the extractive column through recycle. For the sake of reducing the energy cost and the total cost, pressure change can be beneficial as it affects volatility, or new process structures can be devised, namely heat integrated extractive distillation, extractive divided wall column or processes with preconcentrator.

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“…In the past few years, ionic liquids (ILs) have been extensively explored as alternatives to organic solvents (e.g., N,N-dimethylformamide, N-methyl-2-pyrrolidinone) for this process due to their unique properties, such as negligible volatility, high chemical/thermal stability, and wide liquid range. 10 More interestingly, their thermodynamic and physico-chemical properties can be readily tuned by the judicious selection of cation, anion, and substituent groups, making them "designer solvents". [11][12][13] So far, most IL-based EDS studies have mainly focused on the experimental test of different ILs, which is costly, time-consuming, and even impossible for extensive solvent selection considering the great quantity of possible cation-anion combinations.…”

Section: Introductionmentioning

confidence: 99%

Toward Rational Functionalization of Ionic Liquids for Enhanced Extractive Desulfurization: Computer-Aided Solvent Design and Molecular Dynamics Simulation

Wang

Song

et al. 2020

Ind. Eng. Chem. Res.

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Although functionalization is known as a promising way to notably improve the performances of ionic liquids (ILs) in separation processes, studies thereon are mainly experimental trial-and-error based while rational design of functional ILs is scarcely reported.In this work, computer-aided IL design (CAILD) and molecular dynamics (MD) simulation are combined towards rationally functionalizing ILs for the enhanced extractive desulfurization (EDS) of fuel oils. First, the UNIFAC-IL model is extended based on experimental data to specifically cover interaction parameters associated with four functional groups (i.e., hydroxyl, methoxy, vinyl, and cyanomethyl). A mixed-integer nonlinear programming (MINLP) problem is then formulated for the computer-aided design of functional ILs for the EDS task. Finally, MD simulations are performed to study the intermolecular interactions between the top IL candidates and model fuel oil components; by comparing with those for literature-reported ILs, the enhanced EDS performances of the designed functional ILs are well rationalized.

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Pilot plant study on the extractive distillation of toluene–methylcyclohexane mixtures using NMP and the ionic liquid [hmim][TCB] as solvents

Cited by 27 publications

References 21 publications

Mass Transfer in Extractive Distillation when Using Ionic Liquids as Solvents

Mass Transfer in Extractive Distillation when Using Ionic Liquids as Solvents

Review of extractive distillation. Process design, operation, optimization and control

Toward Rational Functionalization of Ionic Liquids for Enhanced Extractive Desulfurization: Computer-Aided Solvent Design and Molecular Dynamics Simulation

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