Effect of ionic liquid 1-methylimidazolium chloride on the vapour liquid equilibrium of water, methanol, ethanol, and {water+ethanol} mixture

Shen, Chong; Li, Xuemei; Lu, Yingzhou; Li, Chunxi

doi:10.1016/j.jct.2011.06.002

Cited by 32 publications

(22 citation statements)

References 23 publications

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“…The NRTL binary interaction parameters available in the Aspen Plus databases were used for the well-known ethanol/water/cyclohexane and ethanol/water/ethylene glycol ternary mixtures. For the systems with ILs, the NRTL binary interaction parameters were used as presented by [47] Table 2 Experimental design…”

Section: Tablementioning

confidence: 99%

Multivariate statistical optimization of the ethanol fuel dehydration process using ionic liquids

Cavalcanti

Queiroz

Stragevitch

et al. 2021

CI&CEQ

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In this work, the ethanol fuel dehydration process was optimized using the Aspen Plus? simulator and a multivariate statistical technique based on the desirability function. The suitability of the ionic liquids 1-methylimidazolium chloride ([Mim][Cl]), 1-ethyl-3-methylimidazolium chloride ([Emim][Cl]), 1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) and 1-hexyl-3-methylimidazolium chloride ([Hmim][Cl]), as extractive distillation entrainers, was also evaluated and compared to the conventional solvents, ethylene glycol and cyclohexane. Among the solvents studied, [Mim][Cl] required the lowest energy consumption, about 8% less energy use when compared to the optimized process using ethylene glycol. The multivariate statistical techniques employed were effective in the optimization of the extractive distillation processes as the process energy consumption could be minimized while achieving ethanol purity in agreement with the current specifications as well as obtaining a high solvent recovery. With the desirability approach it was possible to improve the process performance with little or no modification of existing processing plants.

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Section: Tablementioning

confidence: 99%

Multivariate statistical optimization of the ethanol fuel dehydration process using ionic liquids

Cavalcanti

Queiroz

Stragevitch

et al. 2021

CI&CEQ

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“…The pure component properties were estimated by group contribution methods, and the NRTL model was used for equilibrium calculations [16]. The binary interaction parameters for the NRTL equation were taken from Shen et al [12] for 1-methylimidazolium chloride and from Geng et al [11] for the 1-butyl-3-methylimidazolium chloride. A sensitivity analysis was carried out first to detect the best location of the IL feed and the operating conditions needed to provide a 0.995 purity of ethanol in the distillate product.…”

Section: Ionic Liquids Selection and Control Strategiesmentioning

confidence: 99%

“…In recent years, the use of new compounds known as ionic liquids (ILs) has been considered for ethanol dewatering. Several authors have reported that such solvents promote significant changes on the vapor-liquid equilibrium (VLE) properties of the ethanol-water system, improving the ethanol dehydration process with larger separation factors at low ethanol concentrations [11][12][13]. Some design methodologies have been suggested for extractive distillation columns for ethanol dehydration using ILs as entrainers, such as those proposed by Chavez-Islas et al [14], Roughton et al [15], Ramírez-Corona et al [16] and Zhu et al [17] Some experimental works have also evaluated the feasibility of using such solvents at a pilot plant scale that show promising perspectives for their application [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Effect of ionic liquids as entrainers on the dynamic behavior of ethanol-water extractive columns

et al. 2019

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Ionic liquids (ILs) have been recently considered as potential entrainers for extractive distillation. The use of ILs may affect the vapor-liquid properties to aid the separation of azeotropic mixtures. In particular, their effectiveness has been observed for ethanol dehydration, showing promising perspectives for their industrial implementation. However, there is still a lack of information about the effect of ILs on the system controllability. The objective of this work is to explore the dynamic implications of the use of two types of ionic liquids on the ethanol dehydration process. An equimolar feed mixture of ethanol and water was considered, and different IL concentrations were tested. The results show that changing the IL concentration affect the degree of stabilization of the product stream, even when smooth dynamic responses were in many cases observed.

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“…Therefore, a non-volatile solvent is added to the column producing free solvent products in the condenser. Lately, many works have been published regarding the separation of azeotropes and close boiling point mixtures using ionic liquids as solvent, most of them are related to vapor-liquid equilibrium evaluation of ionic liquids for improving relative volatilities [12][13][14][15][16][17][18][19][20][21][22]. Here, it has been demonstrated that, in general, ionic liquids can produce better relative volatilities than organic solvents [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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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Effect of ionic liquid 1-methylimidazolium chloride on the vapour liquid equilibrium of water, methanol, ethanol, and {water+ethanol} mixture

Cited by 32 publications

References 23 publications

Multivariate statistical optimization of the ethanol fuel dehydration process using ionic liquids

Multivariate statistical optimization of the ethanol fuel dehydration process using ionic liquids

Effect of ionic liquids as entrainers on the dynamic behavior of ethanol-water extractive columns

Mass Transfer in Extractive Distillation when Using Ionic Liquids as Solvents

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