CO2 solubility and mass transfer in water-lean solvents

Wanderley, Ricardo Ramos; Yuan, Ye; Rochelle, Gary T.; Knuutila, Hanna

doi:10.1016/j.ces.2019.03.052

Cited by 47 publications

(34 citation statements)

References 30 publications

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“…Very recently, Shirazizadeh and Haghtalab measured the simultaneous solubility of CO 2 and ethyl mercaptan in mixed MDEA + SFL + H 2 O solvent and investigated the effect of the addition of SFL and MDEA concentration on the solvent performance. Finally, the recent works of Wanderley et al regarding CO 2 solubility in aqueous and nonaqueous mixtures of MDEA + MEG (monoethylene glycol) and the studies of Skylogianni et al on CO 2 solubility in MDEA + MEG, MDEA + MEG + water, and MDEA + TEG (triethylene glycol) systems, as cases of simultaneous CO 2 and water removal from gas streams, are worth mentioning here. There are few reports on H 2 S solubility in hybrid solvents.…”

Section: Introductionmentioning

confidence: 98%

Vapor–Liquid Equilibria of H₂S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Shokouhi¹,

Zoghi²,

Jalili³

et al. 2021

J. Chem. Eng. Data

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The solubility of hydrogen sulfide (H2S) in a mixed solvent containing (19.5 to 35.5) mass percent of N-methyldiethanolamine (MDEA), (0 to 11.6) mass percent of piperazine (PZ), (0 to 10) mass percent of sulfolane (SFL), and water at temperatures of (313.15 to 353.15) K and H2S partial pressures of up to about 2 MPa is reported. To determine the absorption of H2S, the density of the solutions in the corresponding temperature range was measured using a vibrating-tube densimeter. The results show that H2S solubility decreases with increasing temperature and increases with partial pressure of H2S. In addition, increasing PZ concentration can enhance the absorption capacity of MDEA, as a benchmark alkanolamine, in aqueous and mixed aqueous sulfolane solutions in the low-loading region. A thermodynamic model based on the extended Debye–Hükel theory, namely Deshmukh-Mather model for the liquid phase, combined with the Peng-Robinson equation of state for the gas phase, was applied to correlate the H2S solubility data obtained. The average absolute deviation of the correlated data from the experimental data is 6.5%, which implies good correlative accuracy of the thermodynamic model employed in this work.

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Section: Introductionmentioning

confidence: 98%

Vapor–Liquid Equilibria of H₂S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Shokouhi¹,

Zoghi²,

Jalili³

et al. 2021

J. Chem. Eng. Data

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“…In addition, it also has relatively low viscosity. The use of water-lean blends is desirable to improve the CO 2 capture performance of aqueous and nonaqueous absorbents mentioned above. ,− We have no wish to defend the viability of the MAE + DMSO + water system as a candidate for industrial CO 2 absorbent. However, the literature about the physical properties of these blends is extremely scarce.…”

Section: Introductionmentioning

confidence: 99%

Densities, Viscosities, and Excess/Deviation Properties of the Ternary System 2-(Methylamino)ethanol + Dimethyl Sulfoxide + Water and the Binary Subsystems

et al. 2021

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Densities and viscosities of the ternary system 2-(methylamino)ethanol (MAE) + DMSO + water and its corresponding binary constituents have been measured experimentally over the whole composition range and the temperature range from 293 to 353 K. The excess molar volumes (V E), viscosity deviations (Δη), and excess free energies of activation (ΔG *E) of the binary systems were correlated with the Redlich–Kister equation, while the experimental data of ternary mixtures were represented by using Nagata–Tamura, Cibulka, Singh, and Redlich–Kister equations. For binary mixtures, the V E values of aqueous DMSO and aqueous MAE are negative but positive for the nonaqueous blend of MAE + DMSO. The values of Δη and ΔG *E of aqueous binary systems are positive and negative, respectively, for the binary mixture of MAE + DMSO over the whole composition range and at all temperatures. These behaviors can be interpreted with molecular interactions and structural effects. The V 123 E and Δη123 values have also been derived from the experimental data of the ternary system. It was found that the V 123 E values are negative except for the regions highly deficient in water. The values of Δη123 become more positive in both H2O- and MAE-rich regions that were highly poor in DMSO. The observed behaviors indicate that the properties of the ternary system investigated are dominated by binary effects.

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“…The authors recommended using (MEA + sulfolane) mixture for post combustion CO 2 capture. Wanderley et al [18] studied a number of water lean amine systems (MEA, 2-methylpiperazine, and n-methyl diethanolamine) mixed with organic solvents such as sulfolane, ethylene glycol, 1-methyl-imidazole, dimethyl sulfoxide, and n-methyl-2-pyrrolidinone. The study focused on the measurements of the mass transfer coefficients and vapour-liquid-equilibria (VLE) data.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of kinetic rates of CO₂ in aqueous solutions of piperazine and methyldiethanolamine with addition of sulfolane

et al. 2021

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Measurements of kinetics rates of CO 2 in aqueous solutions of methyldiethanolamine (MDEA), piperazine (PZ), and mixtures of (MDEA + PZ), (PZ + sulfolane) and (MDEA + sulfolane) were carried out using the stopped flow technique, and reported in terms of pseudo-first-order rate constants (k 0 ). When possible, the second-order reaction rate constants (k 2 ) were regressed from the data. Experiments were performed over new concentration ranges of (10-60), (200-800), (200-800, 10-40), (10-40, 10-200), and (200-800, 10-200) mol/m 3 for the above-mentioned five systems, respectively, and at temperatures varying from (298.15-313.15 K). When sulfolane was added to the amine solution, pseudo-firstorder rate constants in the mixed solvents were higher than in aqueous MDEA and PZ solutions at all temperatures. The kinetic rates were highest at 298.15 K and decreased at higher temperatures for aqueous (MDEA + sulfolane) solutions but increased with temperature for aqueous (PZ + sulfolane) systems. Reaction orders for both PZ and MDEA were practically one at all sulfolane concentrations and temperatures. The base catalysis mechanism was used to regress very well data for aqueous MDEA and (MDEA + sulfolane + water) and the termolecular mechanism was used for (PZ + sulfolane + water) system. Both the zwitterion and termolecular models were able to fit the experimental data for the aqueous PZ system well. Finally, the termolecular and a hybrid model based on the combination of the Zwitterion and base catalysis mechanisms were able to successfully correlate the experimental data for the mixed aqueous (MDEA + PZ) systems.

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CO2 solubility and mass transfer in water-lean solvents

Cited by 47 publications

References 30 publications

Vapor–Liquid Equilibria of H₂S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Vapor–Liquid Equilibria of H₂S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Densities, Viscosities, and Excess/Deviation Properties of the Ternary System 2-(Methylamino)ethanol + Dimethyl Sulfoxide + Water and the Binary Subsystems

Enhancement of kinetic rates of CO₂ in aqueous solutions of piperazine and methyldiethanolamine with addition of sulfolane

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CO2 solubility and mass transfer in water-lean solvents

Cited by 47 publications

References 30 publications

Vapor–Liquid Equilibria of H2S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Vapor–Liquid Equilibria of H2S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Densities, Viscosities, and Excess/Deviation Properties of the Ternary System 2-(Methylamino)ethanol + Dimethyl Sulfoxide + Water and the Binary Subsystems

Enhancement of kinetic rates of CO2 in aqueous solutions of piperazine and methyldiethanolamine with addition of sulfolane

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Vapor–Liquid Equilibria of H₂S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Vapor–Liquid Equilibria of H₂S in Aqueous Mixtures of N-Methyldiethanolamine + Piperazine + Sulfolane

Enhancement of kinetic rates of CO₂ in aqueous solutions of piperazine and methyldiethanolamine with addition of sulfolane