Purification of model biogas from toluene using deep eutectic solvents

Słupek, Edyta; Makoś, Patrycja; Gębicki, Jacek; Rogala, Andrzej

doi:10.1051/e3sconf/201911600078

Cited by 13 publications

(5 citation statements)

References 26 publications

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“…The studies presented in the literature are limited to the removal of inorganic compounds, i.e., H 2 O, CO 2 , H 2 S, and NH 3 from gaseous phases [35][36][37]. Only a few works refer to their use to remove volatile organic compounds from the gas phase [38,39].…”

Section: Vscsmentioning

confidence: 99%

Absorptive Desulfurization of Model Biogas Stream Using Choline Chloride-Based Deep Eutectic Solvents

Słupek

Makoś

2020

Sustainability

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The paper presents a synthesis of deep eutectic solvents (DESs) based on choline chloride (ChCl) as hydrogen bond acceptor and phenol (Ph), glycol ethylene (EG), and levulinic acid (Lev) as hydrogen bond donors in 1:2 molar ratio. DESs were successfully used as absorption solvents for removal of dimethyl disulfide (DMDS) from model biogas steam. Several parameters affecting the absorption capacity and absorption rate have been optimized including kinds of DES, temperature, the volume of absorbent, model biogas flow rate, and initial concentration of DMDS. Furthermore, reusability and regeneration of DESs by means of adsorption and nitrogen barbotage followed by the mechanism of absorptive desulfurization by means of density functional theory (DFT) as well as FT-IR analysis were investigated. Experimental results indicate that the most promising DES for biogas purification is ChCl:Ph, due to high absorption capacity, relatively long absorption rate, and easy regeneration. The research on the absorption mechanism revealed that van der Waal interaction is the main driving force for DMDS removal from model biogas.

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Section: Vscsmentioning

confidence: 99%

Absorptive Desulfurization of Model Biogas Stream Using Choline Chloride-Based Deep Eutectic Solvents

Słupek

Makoś

2020

Sustainability

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“…Moura 29 conducted relevant exploratory work in 2017, which verified that the absorption performance, in terms of absorption capacity and cycling performance, of quaternary ammonium salt DESs for toluene, acetaldehyde, and dichloromethane is comparable to that of imidazolium ILs and silicone oil. Słupek 30 proposed that the chlorinated choline-tetraethylene glycol 1:2 DES can effectively remove toluene impurities from biogas, and its dynamic absorption performance is higher than that of imidazolium ILs. Song et al 31 studied the absorption performance of hydrophobic DES tetraethylammonium chloride-oleic acid (1:3) for toluene.…”

Section: Introductionmentioning

confidence: 99%

Solubility and Mass Transfer Performance of Ethane and n-Butane in Menthol and Decanoic Acid Deep Eutectic Solvent

Song

2024

ACS Omega

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The absorption performance and mechanism of the deep eutectic solvent (DES), composed of menthol and decanoic acid, were investigated. The solubility of volatile organic compounds (VOCs) in the DES was studied through saturation solution experiments, wherein the solubility of ethane and n-butane increases with a decrease in temperature and increasing pressure. Henry's law constants of ethane and n-butane in the DES at 288.2 K were 2.089 and 0.136 MPa, respectively, demonstrating the high solubility for light hydrocarbons that surpasses or equals that of ionic liquids. The mass transfer and regeneration performance of the DES were investigated by using dynamic bubbling experiments. Results demonstrated that the removal rate of both ethane and n-butane increased as the gas flow rate decreased and the VOC concentration in the model gas increased. Specifically, the removal rate of ethane reached 99.50% at a temperature of 293.2 K, a VOC concentration VOC of 10,000 μmol/mol, and a gas flow rate of 30 mL/min, while the removal rate of n-butane was higher than that of ethane under the same conditions, achieving a removal rate exceeding 99.99%. Furthermore, no significant decrease in the removal rate for n-butane was observed during the four regeneration processes. Interaction energies between the VOC molecule and DES were calculated using the quantum chemistry method. It was found that the interactions between the VOC molecule and DES are primarily attributed to dispersion attractive effects which belong to weak interactions; therefore, the absorption of light hydrocarbon by the DES belongs to a physical process. The DES has been proven to be effective for the recovery of light hydrocarbons, providing a promising approach to address the key challenge in comprehensive treatment of VOCs in the petrochemical industry.

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“…Up to now, DESs have been applied to capture various acid gases 27 including CO 2 , 28 NO x , 29 SO 2 , 30 H 2 S, 31 and NH 3 , 32 because of their remarkable hydrogen‐bonding ability. Recently, Słupek et al 33 found that ChCl‐based DESs have superior absorption capacity compared to ILs and conventional organic solvents. Moura et al 34 demonstrated the affinity of DESs for toluene, acetaldehyde, and dichloromethane by measuring the gas–liquid partition coefficients and liquid‐phase absorption capacities.…”

Section: Introductionmentioning

confidence: 99%

“…25,26 Up to now, DESs have been applied to capture various acid gases 27 including CO 2 , 28 NOx, 29 SO 2 , 30 H 2 S, 31 and NH 3 , 32 because of their remarkable hydrogen-bonding ability. Recently, Słupek et al 33 found that ChCl-based DESs have superior absorption capacity compared to ILs and conventional organic solvents. Moura et al 34 In this work, we study the application of DESs as new VOC absorbents in capturing condensable cyclohexane gas from molecular level (e.g., absorption mechanism) to systematic scale (e.g., absorption performance analysis).…”

mentioning

confidence: 99%

Deep eutectic solvents for efficient capture of cyclohexane in volatile organic compounds: Thermodynamic and molecular mechanism

Gui

Zhu

et al. 2021

AIChE Journal

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Deep eutectic solvents (DESs) as promising green absorbents were first proposed to capture the condensable cyclohexane gas. Choline chloride-ethylene glycol (EG) (Ethaline) and choline chloride-urea (Reline) were prepared using choline chloride as the hydrogen-bond acceptor (HBA) and urea or EG as the hydrogen-bond donor (HBD). To explore the potential application of DESs in condensable gas capture, the COSMO-RS model was used to predict the solubility of cyclohexane in Ethaline and Reline. The thermodynamic properties, that is, Henry's constant and excess enthalpy, were estimated by correlating solubility data with Henry's law equation.Quantum chemical (QC) calculation was applied to understand the absorption mechanism at the molecular level. The results showed that the absorption performance of cyclohexane in Ethaline and Reline was dependent on the weak interaction between O of EG (or N of urea) and H of cyclohexane as well as the free volume effect of DESs.

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Purification of model biogas from toluene using deep eutectic solvents

Cited by 13 publications

References 26 publications

Absorptive Desulfurization of Model Biogas Stream Using Choline Chloride-Based Deep Eutectic Solvents

Absorptive Desulfurization of Model Biogas Stream Using Choline Chloride-Based Deep Eutectic Solvents

Solubility and Mass Transfer Performance of Ethane and n-Butane in Menthol and Decanoic Acid Deep Eutectic Solvent

Deep eutectic solvents for efficient capture of cyclohexane in volatile organic compounds: Thermodynamic and molecular mechanism

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