Potential of ionic liquids for VOC absorption and biodegradation in multiphase systems

Quijano, Guillermo; Couvert, Annabelle; Amrane, Abdeltif; Darracq, Guillaume; Couriol, Catherine; Cloirec, Pierre Le; Paquin, Ludovic; Carrié, Daniel

doi:10.1016/j.ces.2011.01.047

Cited by 82 publications

(38 citation statements)

References 31 publications

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“…These results are supported by the fact that toluene is very hydrophobic (octanol-water partition coefficient of 2.73) and can involve potential -stacking interactions with ionic liquids. 6 ], the partition coefficient was 1.6 % higher than the value reported by Quijano et al [23]. Being less hydrophobic than toluene and without potential  interactions, the DCM partition coefficients were from 1.67 to 30 times higher than the toluene partition coefficients, in the range from 5 to 17 Pa m 3 mol -1 , but they remain significantly lower than in water (from 14 to 50 times).…”

Section: Voccontrasting

confidence: 53%

“…Therefore, they can be designed to fulfill the required criteria for hydrophobic VOCs absorption [18][19][20][21][22] and subsequent biodegradation by a biological material (microorganisms, bacteria, activated sludge, etc.) contained in an aqueous phase in a two-phase partitioning bioreactor [12,23]. Their high potential for the absorption of different hydrophobic organic compounds has been already demonstrated through the determination of the partition coefficients at infinite dilution (Henry's law constants) of toluene and dimethyldisulfide (DMDS) in two ILs ([Bmim] [PF 6 ] and [Bmim][NTf 2 ]) which ranged between 1.5 and 3.2 Pa m 3 mol -1 [10].…”

Section: Introductionmentioning

confidence: 99%

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Assessment of VOC absorption in hydrophobic ionic liquids: Measurement of partition and diffusion coefficients and simulation of a packed column

Castillo

Biard

Guihéneuf

et al. 2019

Chemical Engineering Journal

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deltif Amrane, et al.. Assessment of VOC absorption in hydrophobic ionic liquids: Measurement of partition and diffusion coefficients and simulation of a packed column. Chemical Engineering Journal, Elsevier, 2019, 360, pp. AbstractPartition coefficients of toluene and dichloromethane (DCM) in 23 hydrophobic ionic liquids (ILs), which can be used potentially for the physical absorption of volatile organic compounds (VOCs), were measured at 298 K. The partition coefficients, expressed as Henry's law constants, were 400 to 1300 times for toluene and 10 to 47 times for DCM lower in the selected ILs than in water. Thus, the toluene and DCM diffusion coefficients were measured in three high potential hydrophobic ILs and in [Bmim][NTf 2 ] using a thermogravimetric microbalance. Diffusivity measurements were performed at 298K for toluene and between 278 and 308K for DCM. Diffusion coefficients in ILs, ranging between 1 and 4×10 -11 m 2 s -1 , were from 18 to 90 times lower than in water at 298 K. The diffusion coefficients were correlated to the temperature, the solute molar volume, the IL viscosity and molar volume with an average error of 4.2%. Finally, a 3 m industrial packed column was simulated for the removal of DCM and toluene in [AllylEt 2 S][NTf 2 ] and [bmim][NTf 2 ], which both present moderate viscosities of nearly 50 mPa s at 293K. The overall mass-transfer coefficient, the removal efficiency and the pressure drop were calculated and compared to those obtained using other heavy solvents (a silicon * Corresponding author : pierre-francois.biard@ensc-rennes.fr, Tel: + 33 2 23 23 81 49 2 oil and di-(2-ethylhexyl) adipate). This prospective simulation has demonstrated a good potential of ionic liquids for the toluene removal. Nonetheless, the DCM removal efficiencies simulated were lower than 44%. It suggests that even more efficient ionic liquids can be tuned and synthesized in the future for this specific application. Highlights Toluene partition coefficients in 23 ILs were in the range 0.5-3.5 Pa m 3 mol -1  Dichloromethane partition coefficients in 23 ILs were in the range 5-17 Pa m 3 mol -1  VOC diffusion coefficients in the range 1-4×10 -11 m 2 s -1 were measured in 4 ILs  The computed toluene removal efficiency in a packed column was from 52 to 99.6%  The computed dichloromethane removal efficiency in a packed column was lower than 44% Graphical abstractVicious air containing VOC: Treated air Ionic liquid Loaded ionic liquid Metal Pall rings 3.0 m 1.0 m •Toluene •Dichloromethane Operating conditions Hydrodynamics Mass-transfer rate (K l a°) Pressure drop Removal efficiency Solvent assessment for VOC removal in a packed column Partition coefficient Diffusion coefficient Ionic liquid properties (m, r, s) Static headspace method Static thermogravimetric method Measurements Simulation •[bmim][NTf 2 ] •[AllylEt 2 S][NTf 2 ] Finally, the hydrodynamics and mass-transfer in a packed column fed with [Bmim][NTf 2 ] and [AllylEt 2 S][NTf 2 ] were simulated for DCM and toluene absorption. * AR is the affinity r...

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Section: Voccontrasting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Assessment of VOC absorption in hydrophobic ionic liquids: Measurement of partition and diffusion coefficients and simulation of a packed column

Castillo

Biard

Guihéneuf

et al. 2019

Chemical Engineering Journal

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“…Furthermore, the water vapor present in most of the gas streams and/or generated from VOCs oxidation frequently deactivates the inorganic catalytic systems. Biological treatments can represent a cost‐effective solution for VOC removal, but they are not suitable when the microbial activity is limited by the slow VOC transfer from the gas phase to cell‐containing aqueous phase . It is also necessary to take into account that any destructive method eliminates the possibility of recovering the VOC.…”

Section: Introductionmentioning

confidence: 99%

Optimized ionic liquids for toluene absorption

et al. 2012

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Conductor‐like‐screening model for real solvents (COSMO‐RS) method was used to analyze the solute‐solvent interactions and to screen Henry's law constant of toluene over 272 ionic liquids (ILs), to select high‐capacity absorbents. Thermogravimetric experiments were carried out to evaluate the toluene absorption by selected ILs at different temperatures and atmospheric pressure. Experimental equilibrium data were found in good agreement with COSMO‐RS predictions. Complete desorption of toluene by N2 stripping was achieved, indicating an easy regeneration. The kinetic curves were described by a phenomenological diffusion model, obtaining effective diffusivities in reasonable concordance with those calculated by Wilke–Chang correlation. The separation process with selected ILs was modeled by Aspen Plus and a comparison with organic absorbents was carried out. Equilibrium‐ and rate‐based simulations were used to analyze the importance of thermodynamics and kinetics in toluene absorption by ILs. Current computational‐experimental research allowed selecting a set of suitable ILs for toluene absorption. © 2012 American Institute of Chemical Engineers AIChE J, 59: 1648–1656, 2013

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“…26 The affinity of hexadecane is 2% lower with DMS and 60% lower with DMDS in comparison with literature data for SO. 22 27 Diethyl sebacate, heptamethylnonane, 1-octadecene and heptamethyltrisiloxane are other NAP systems of which partitioning studies were performed. 21 Another strategy consists of the application of water-miscible solvents.…”

Section: K Aw+napmentioning

confidence: 99%

“…The K A,NAP for DMS and DMDS with [C 4 mim][PF 6 ] was, respectively, 0.011 and 0.0013. Another ionic liquid structure such as [C 4 mim][NTf 2 ] alters the K A,NAP for DMS and DMDS to, respectively, 0.009 and 0.0012 . Diethyl sebacate, heptamethylnonane, 1‐octadecene and heptamethyltrisiloxane are other NAP systems of which partitioning studies were performed …”

Section: Introductionmentioning

confidence: 99%

Increasing mass transfer of volatile organic compounds in air scrubbers: a fundamental study for different gas–liquid systems

Bruneel

Walgraeve

Dumortier

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Air scrubbers are commonly used as treatment techniques for industrial waste gases containing volatile organic compounds (VOCs). Mass transfer of hydrophobic compounds to liquid can be increased using water soluble additives in the scrubbing liquid or applying water‐miscible or immiscible solvents. The design of air scrubbers requires reliable partition data, which are limited in the literature. This manuscript provides partitioning data of new scrubber liquids and subsequent research will link the partitioning data with mass transfer characteristics in a pilot‐scale scrubber. RESULTS The DynAb method was applied for the first time to a broad set of gas–liquid systems to study the partitioning behaviour of volatile organic sulphides and aldehydes. Cyclodextrins (CD) were chosen as water soluble additives. Silicone oil (SO) and isopropylmyristate (IPM) were used as water immiscible solvents, whereas dipropylene glycol methyl ether was applied as a water‐miscible solvent. The inclusion of VOCs into the CD structure is very compound specific. Binding constants were calculated to quantify the CD‐VOC affinity and the partitioning behaviour of the VOCs with oils and solvents was quantified. The air‐to‐water partition coefficient of hexanal could be reduced more than 50 times with a concentration of 72 g L‐1 α‐CD. IPM (100% v/v) could reduce the air‐to‐IPM partitioning coefficient by a factor of 120 for dimethyl disulphide. CONCLUSION The determined partition coefficients can be used for suitability evaluation for the design and modelling of air treatment systems. A broad range of evaluated gas–liquid systems provides quantitative knowledge about VOC behaviour. © 2017 Society of Chemical Industry

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Potential of ionic liquids for VOC absorption and biodegradation in multiphase systems

Cited by 82 publications

References 31 publications

Assessment of VOC absorption in hydrophobic ionic liquids: Measurement of partition and diffusion coefficients and simulation of a packed column

Assessment of VOC absorption in hydrophobic ionic liquids: Measurement of partition and diffusion coefficients and simulation of a packed column

Optimized ionic liquids for toluene absorption

Increasing mass transfer of volatile organic compounds in air scrubbers: a fundamental study for different gas–liquid systems

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