Experimental kinetic analysis of ethylene absorption in ionic liquid [Bmim]NO3 with dissolved AgNO3 by a semi-continuous process

Mortaheb, Hamid Reza; Mafi, Morteza; Mokhtarani, Babak; Sharifi, Ali; Mirzaei, Mojtaba; Khodapanah, Nasrin; Ghaemmaghami, F.

doi:10.1016/j.cej.2010.01.001

Cited by 18 publications

(8 citation statements)

References 34 publications

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“…Moreover, the driving force for solute transport is maximized, which is particularly important when the partitioning of the target solute is not thermodynamically favoured. The ionic liquid regeneration can be performed by different techniques, such as direct distillation, [23][24][25][26] evaporation, [27][28][29] reextraction by an organic or aqueous solvent [30][31][32] or by using supercritical carbon dioxide [33][34][35], membrane separation, [36][37][38]_ENREF_8 stripping with a sweep gas or vacuum, with or without thermal treatment, [39][40][41][42][43] or by a combination of methods.…”

Section: Separation Processes Such As Extraction and Oxidation Adsormentioning

confidence: 99%

Thiols׳ extraction from “jet-fuel” assisted by ionic liquids in hollow fibre membrane contactors

Ferreira

Neves

Ribeiro³

et al. 2015

Journal of Membrane Science

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This work proposes an alternative technique for the selective extraction of thiols from a "jet-fuel" model stream, using the 1-ethyl-3-methylimidazolium triflate ([C 2 mim][CF 3 SO 3 ]) ionic liquid as extractant, in a hollow fibre membrane contactor. Due to the low distribution ratio of the thiol towards the ionic liquid, observed in single extraction, a regeneration step (stripping with vacuum or a sweep gas) was added to the extraction process, in order to maximize the concentration gradient overcoming thermodynamic constraints. The stripping with a sweep gas allowed for a complete regeneration of the ionic liquid producing a jet-fuel with sulphur content lower than 2 ppm. Since the controlling step of the process is the extraction of thiol from the feed phase to the ionic liquid phase, the increase of the ionic liquid velocity and operating temperature may further enhance the process performance. The results obtained along with the ultra-low sulphur jet-fuel model produced, prove the high potential of this integrated process as an alternative method for replacing the current expensive desulphurization process.

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Section: Separation Processes Such As Extraction and Oxidation Adsormentioning

confidence: 99%

Thiols׳ extraction from “jet-fuel” assisted by ionic liquids in hollow fibre membrane contactors

Ferreira

Neves

Ribeiro³

et al. 2015

Journal of Membrane Science

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“…Various solvents were proposed for ethylene absorption in the literature. Polyethylene [7], ionic liquids [19,20], methylpropionate [30], toluene [17,28], norbornene [28], CuCl/Aniline/Nmethylpyrrolidone [25], aqueous silver nitrate [8] are some examples.…”

Section: Introductionmentioning

confidence: 99%

Experimental study and thermodynamic modelling of ethylene absorption in N-methyl-2-pyrrolidone (NMP)

et al. 2020

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Determining the solubility of gases in solvents and considering non-idealities at different operating conditions are essential to design a cost-effective and energy-efficient absorption process. In this work, using a lab-made set-up, solubility of ethylene in N-methyl-2-pyrrolidone (NMP) was measured at different temperatures (278.15, 298.15, and 328.15 K) and pressures up to 14 bar, and the kinetic and equilibrium data were obtained. Accordingly, Henry’s law constants are calculated at various temperatures. Then, thermodynamic modeling was accomplished by applying Peng-Robinson equation of state (PR-EOS) and Wilson activity coefficient model, and the binary interaction parameters were estimated. By the thermodynamic modeling, positive deviation from ideal behavior was apparently observed. Due to low absolute average deviation of < 7.7%, the correlated model was able to predict the ethylene solubility in NMP with a reliable accuracy.

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“…Therefore, cryogenic distillation is viable only for 2 of 17 separation of streams containing large quantities of olefins-e.g., for downstream from large-scale catalytic cracking plants [6]. Other separation technologies such as extractive distillation and physical adsorption exist, but they are also expensive and energy-consuming [7].…”

Section: Introductionmentioning

confidence: 99%

“…The high potential of ionic liquids in the separation process is accounted by zero vapor pressure which prevents sorbent evaporation in the membrane pores and their clogging by silver nitrate crystals. Other ionic liquids benefits are high chemical stability, a wide range of physical-chemical properties under varying ionic liquid cation or anion, and high olefins affinity [7,[30][31][32][33]. For the purposes of olefin/paraffin separation, imidazolium liquids are widely used: 1-ethyl-3-methylimidazolium dicyanamide ( [34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

“…These ionic liquids (ILs) are easy to obtain and therefore they are commonly used to solve various technological tasks, including different absorption-based separation processes [38]. In [7], one of the most widely used silver salt solutions-silver nitrate-was dissolved in 1-butyl-3-methylimidazolium nitrate ([Bmim][NO 3 ]); the concentration of AgNO 3 was up to 5 M, thus providing high ethylene absorption values.…”

Section: Introductionmentioning

confidence: 99%

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Surface Modified Polysulfone Hollow Fiber Membranes for Ethane/Ethylene Separation Using Gas-Liquid Membrane Contactors with Ionic Liquid-Based Absorbent

Kostyanaya

Баженов

Borisov

et al. 2019

Fibers

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Olefin/paraffin separation is an important technological process. A promising alternative to conventional energy-consuming methods is employment of gas-liquid membrane contactors. In the present work, the membranes used were polysulfone (PSf) asymmetrical porous hollow fibers fabricated via the NIPS (non-solvent induced phase separation) technique in the free spinning mode. The surface of the fine-pored selective layer from the lumen side of the fibers was modified by layer-by-layer deposition of perfluorinated acrylic copolymer Protect Guard® in order to hydrophobized the surface and to avoid penetration of the liquid absorbent in the porous structure of the membranes. The absorbents studied were silver salts (AgNO3 and AgBF4) solutions in five ionic liquids (ILs) based on imidazolium and phosphonium cations. The membranes were analyzed through gas permeance measurement, SEM and dispersive X-ray (EDXS). Contact angle values of both unmodified and modified membranes were determined for water, ethylene glycol, ILs and silver salts solutions in ILs. It was shown that the preferable properties for employment in membrane contactor refer to the PSf hollow fiber membranes modified by two layers of Protect Guard®, and to the absorbent based on 1 M AgNO3 solution in 1-ethyl-3-methylimidazolium dicyanamide. Using the membrane contactor designed, ethylene/ethane mixture (80/20) separation was carried out. The fluxes of both components as well as their overall mass transport coefficients (MTC) were calculated. It was shown that the membrane absorption system developed provides absorption of approx. 37% of the initial ethylene volume in the mixture. The overall MTC value for ethylene was 4.7 GPU (gas permeance unit).

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Experimental kinetic analysis of ethylene absorption in ionic liquid [Bmim]NO3 with dissolved AgNO3 by a semi-continuous process

Cited by 18 publications

References 34 publications

Thiols׳ extraction from “jet-fuel” assisted by ionic liquids in hollow fibre membrane contactors

Thiols׳ extraction from “jet-fuel” assisted by ionic liquids in hollow fibre membrane contactors

Experimental study and thermodynamic modelling of ethylene absorption in N-methyl-2-pyrrolidone (NMP)

Surface Modified Polysulfone Hollow Fiber Membranes for Ethane/Ethylene Separation Using Gas-Liquid Membrane Contactors with Ionic Liquid-Based Absorbent

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