Thermophysical properties and CO2 absorption of ammonium-based ionic liquids

Halim, Nur Hamizah; Yunus, Normawati M.; Wilfred, Cecilia Devi

doi:10.1063/1.5055446

Cited by 10 publications

(5 citation statements)

References 17 publications

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“…The sequence of viscosity is MEA‐TBAAc>MEA‐TBABr>MEA‐TBAOH. MEA‐TBAAc combinations have a greater viscosity because the acetate anion forms a strong hydrogen bond with MEA and H 2 O 43 . MEA‐TBAOH combinations, on the other hand, have a lower viscosity due to fewer molecular interactions.…”

Section: Resultsmentioning

confidence: 99%

“…MEA-TBAAc combinations have a greater viscosity because the acetate anion forms a strong hydrogen bond with MEA and H 2 O. 43 MEA-TBAOH combinations, on the other hand, have a lower viscosity due to fewer molecular interactions. It was also discovered that when temperatures rise, the viscosity of all solvent mixtures decreases considerably.…”

Section: Viscosity Of Aqueous Mea-il Mixturesmentioning

confidence: 99%

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Understanding the physical and thermodynamic properties of monoethanolamine‐ionic liquids for solvent screening in CO₂ capture process

Perumal¹,

Jayaraman²

2022

Asia-Pacific J Chem Eng

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The physical properties such as density, surface tension, and viscosity of monoethanolamine (MEA)-ionic liquids (ILs) solvent mixtures were studied experimentally in this work. The ILs namely, tetrabutylammonium acetate TBAAc, tetrabutylammonium bromide TBABr, and tetrabutylammonium hydroxide TBAOH were used. All the above parameters were measured at atmospheric pressure and various temperatures from 283 to 313 K with a 10 K interval.From the measured experimental data, thermodynamic properties such as thermal expansion, excess molar volume, viscosity deviation, and excess Gibbs free energy were also calculated. The physical and thermodynamic properties are more important to understand the solvent behavior during solvent screening in solvent-based CO 2 capture process. The 30 wt% solvent mixture composition was prepared as 28, 25, and 20 wt% MEA mixed with 2, 5, and 10 wt% ILs. Furthermore, a single empirical model was developed from the measured experimental data and the results are correlated. A good agreement was obtained between correlated and experimental data.

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Section: Resultsmentioning

confidence: 99%

Section: Viscosity Of Aqueous Mea-il Mixturesmentioning

confidence: 99%

Understanding the physical and thermodynamic properties of monoethanolamine‐ionic liquids for solvent screening in CO₂ capture process

Perumal¹,

Jayaraman²

2022

Asia-Pacific J Chem Eng

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“…In addition, Jayaraman 36 has reported that as the temperature increases, the density of ILs decreases due to the kinetic energy of molecular interactions between the ions of ILs and water molecules and becomes weaker. Halim et al 37 think that as the temperature increases, the volume of ILs increased, which resulted in the decrease of density. As the water content increases, the density value of [COC 4 mim]-[Tau] shows a linear decreasing trend.…”

Section: Density Surface Tension and Refractive Indexmentioning

confidence: 99%

Thermodynamic Properties of Ether-Functionalized Ionic Liquids [COC₄mim][Tau]

Wu,

Wei,

Xuan

et al. 2024

J. Chem. Eng. Data

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The ether-functionalized ionic liquid 1-(4-methoxybutyl)-3-methylimidazolium taurine [COC 4 mim][Tau] was prepared and characterized. The density (ρ), surface tension (γ), and refractive index (n D ) were measured at 288.15−328.15 K using a standard addition method. The molar volume (V), standard entropy (S θ ), lattice energy (U lattice ), surface entropy (S a ), surface energy (E a ), and molar surface Gibbs free energy (G m,s) were calculated using the density and surface tension data. By refractive index data, the degree of molar polarization (R m ), molar polarizability (α p ), and its surface tension (γ pre ) were predicted. The results showed that its predicted value was highly similar to the measured value. Then, the variation of vapor pressure (p) of [COC 4 mim][Tau] with temperature was discussed using thermogravimetric analysis of experimental data. It was found that p increased exponentially with temperature, and compared to low temperature, a high temperature is more conducive to the increase of p for [COC 4 mim][Tau]. The enthalpy of vaporization (Δ l g H m θ (T av )) at average temperature (T av ) was calculated by combining the Langmuir equation with the Clausius−Clapeyron equation, and it was converted into the enthalpy of vaporization (Δ l g H m θ (298.15)) at ambient temperature (298.15). It is hoped that these thermodynamic properties data can provide a theoretical basis for the subsequent research.

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“…Hence, it is important to understand the behaviour of ammonium based ILs with amine solvent blends towards CO 2 with the help of physicochemical property study such as density, viscosity, surface-tension, pH, carbon-loading and diffusivity of CO 2. [36][37][38][39][40] This study helps to develop the theories for sustainable CO 2 capture process at various concentrations in order to compare theory and experiment. However, the literature shows that the use of blends of ammonium based ILs-MEA is less reported.…”

Section: Introductionmentioning

confidence: 99%

Amine-Ionic Liquid Blends in CO₂ Capture Process for Sustainable Energy and Environment

Perumal¹,

Jayaraman²

2022

Energy & Environment

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In the present work, an experiment for CO2 capture process were performed by absorption using various aqueous solvent blends of amine and ionic liquids. The solvent blends were prepared for various compositions by mixing TetraButylAmmonium Acetate [TBA][OAC] and TetraButylAmmonium Bromide [TBA][Br] ionic liquids with Monoethanolamine (MEA). The obtained results were compared with baseline MEA. It was observed that capture efficiency of CO2, absorption rate of CO2 and CO2 diffusion coefficient of MEA-[TBA][OAC] and MEA-[TBA][Br] solvent blends were comparatively higher than baseline 30%MEA. Moreover, the parameters such as density, viscosity, pH, carbon loading and surface tension of all the solvent blends were measured for before and after absorption process. The carbon loading of solvent blends MEA-[TBA][Br] (0.405 mole of CO2/mole of solvent) and MEA-[TBA][OAC](0.459 mole of CO2/mole of solvent) was slightly lower than baseline MEA (0.494 mole of CO2/mole of solvent). However, the viscosity of MEA-[TBA][Br] blends were remarkably lower than MEA-[TBA][OAC] blend and baseline MEA. This might be an important key factor in solvent recovery process with lesser energy demand for sustainable energy and environment.

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Thermophysical properties and CO2 absorption of ammonium-based ionic liquids

Cited by 10 publications

References 17 publications

Understanding the physical and thermodynamic properties of monoethanolamine‐ionic liquids for solvent screening in CO₂ capture process

Understanding the physical and thermodynamic properties of monoethanolamine‐ionic liquids for solvent screening in CO₂ capture process

Thermodynamic Properties of Ether-Functionalized Ionic Liquids [COC₄mim][Tau]

Amine-Ionic Liquid Blends in CO₂ Capture Process for Sustainable Energy and Environment

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Thermophysical properties and CO2 absorption of ammonium-based ionic liquids

Cited by 10 publications

References 17 publications

Understanding the physical and thermodynamic properties of monoethanolamine‐ionic liquids for solvent screening in CO2 capture process

Understanding the physical and thermodynamic properties of monoethanolamine‐ionic liquids for solvent screening in CO2 capture process

Thermodynamic Properties of Ether-Functionalized Ionic Liquids [COC4mim][Tau]

Amine-Ionic Liquid Blends in CO2 Capture Process for Sustainable Energy and Environment

Contact Info

Product

Resources

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Understanding the physical and thermodynamic properties of monoethanolamine‐ionic liquids for solvent screening in CO₂ capture process

Understanding the physical and thermodynamic properties of monoethanolamine‐ionic liquids for solvent screening in CO₂ capture process

Thermodynamic Properties of Ether-Functionalized Ionic Liquids [COC₄mim][Tau]

Amine-Ionic Liquid Blends in CO₂ Capture Process for Sustainable Energy and Environment