Experimental investigation of density, viscosity, and surface tension of aqueous tetrabutylammonium-based ionic liquids

Perumal, Muthumari; Ambedkar, B.; Jayaraman, Dhanalakshmi; Krishnan, Jagannathan

doi:10.1007/s11356-020-11174-4

Cited by 18 publications

(21 citation statements)

References 40 publications

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“…The results are in accordance with published results in literature for PILs with diethylammonium and dibutylammonium cations with the density values ranging approximately from 0.82 g.cm −3 to 0.94 g.cm −3 [ 50 ]. A similar observation was also found by other researchers when the densities of their tetrabutylammonium ionic liquids were analyzed over a temperature range of 283.4 to 333.4 K [ 51 ]. As temperature increases, the volume of ionic liquids increases, and the density of the ionic liquids decreases accordingly.…”

Section: Resultssupporting

confidence: 87%

“…The small size of [EHA] cation compared to [BEHA] cation affects local packing of the PIL structure and thus contributes to the increase in the density values of [EHA][C5] [ 37 , 54 ]. Comparable observations using PIL with ethylammonium cation were also found by several researchers, in which an increasing trending packing efficiency was proportional with the decreasing of molecular weight [ 51 , 55 ]. Notably, the increased alkyl chain length in both cation and anion of the PIL has promoted the steric hindrance and asymmetric nature in the PIL structure as bigger and bulkier PILs result in a lower density value for the PILs [ 40 , 41 ].…”

Section: Resultssupporting

confidence: 73%

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Experimental Investigation on Thermophysical Properties of Ammonium-Based Protic Ionic Liquids and Their Potential Ability towards CO2 Capture

et al. 2022

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Ionic liquids, which are extensively known as low-melting-point salts, have received significant attention as the promising solvent for CO2 capture. This work presents the synthesis, thermophysical properties and the CO2 absorption of a series of ammonium cations coupled with carboxylate anions producing ammonium-based protic ionic liquids (PILs), namely 2-ethylhexylammonium pentanoate ([EHA][C5]), 2-ethylhexylammonium hexanoate ([EHA][C6]), 2-ethylhexylammonium heptanoate ([EHA][C7]), bis-(2-ethylhexyl)ammonium pentanoate ([BEHA][C5]), bis-(2-ethylhexyl)ammonium hexanoate ([BEHA][C6]) and bis-(2-ethylhexyl)ammonium heptanoate ([BEHA][C7]). The chemical structures of the PILs were confirmed by using Nuclear Magnetic Resonance (NMR) spectroscopy while the density (ρ) and the dynamic viscosity (η) of the PILs were determined and analyzed in a range from 293.15K up to 363.15K. The refractive index (nD) was also measured at T = (293.15 to 333.15) K. Thermal analyses conducted via a thermogravimetric analyzer (TGA) and differential scanning calorimeter (DSC) indicated that all PILs have the thermal decomposition temperature, Td of greater than 416K and the presence of glass transition, Tg was detected in each PIL. The CO2 absorption of the PILs was studied up to 29 bar at 298.15 K and the experimental results showed that [BEHA][C7] had the highest CO2 absorption with 0.78 mol at 29 bar. The CO2 absorption values increase in the order of [C5] < [C6] < [C7] anion regardless of the nature of the cation.

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 73%

Experimental Investigation on Thermophysical Properties of Ammonium-Based Protic Ionic Liquids and Their Potential Ability towards CO2 Capture

et al. 2022

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“…Previously, researchers investigated the density, surface tension, and viscosity of pure and aqueous ammonium ILs throughout a wide temperature range. The results showed that when temperature rises, the density, surface tension, and viscosity of ILs decrease as kinetic energy increases 26–31 . Later, the density and viscosity of the IL‐MEA hybrid solvent were tested using different IL‐amines and temperatures.…”

Section: Introductionmentioning

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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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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“…It is very important to select proper absorbent in the case of the PCC method because higher absorptivity of CO 2 is only possible if the kinetics of the absorbent is high in the reaction environment. While aminebased absorbent (alkanolamines) is widely researched and proven to show maximum absorption, many other absorbents like ionic liquids, aqueous ammonia (AQ_NH 3 ), piperazine (PZ), and taurine are also used for CO 2 capture (Li et al 2013;Chen 2007;Artanto et al 2014;Kemper et al 2011;Brúder et al 2012;Singh et al 2016a, b, c;Zeng et al 2017;Perumal et al 2020). Amine-based chemical absorbents are used for removing acidic gas like CO 2 and H 2 S since 1950 only (Kohl and Nielsen 1997).…”

Section: Introductionmentioning

confidence: 99%

A comprehensive multidisciplinary investigation on CO2 capture from diesel engine

Kumar

Pandey

Parwani

et al. 2021

Environ Sci Pollut Res

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Climate change and global warming are the visible consequences of the increased amount of carbon dioxide (CO 2 ) in the atmosphere. Among the various sources of anthropogenic CO 2 emission, the diesel engine has a significant contribution. The development of a reliable system to efficiently minimize CO 2 emissions from diesel engines to the safest level is lacking in the open literature. Therefore, a comprehensive multidisciplinary approach has been applied in this paper to investigate the efficacy of the post-combustion carbon capture (PCC) process for the diesel engine. The experiments have been performed on the exhaust of a direct injection diesel engine at five different brake powers with blends of aqueous ammonia (AQ_NH 3 ), monoethanolamine (MEA), N,N-dimethylethanolamine (DMEA), and 1-ethyl-3-methylimidazolium tetrafluoroborate (C 2 mim BF 4 ) ionic liquid (IL) as an absorbent for CO 2 capture. The reaction mechanism of these absorbent with CO 2 are also studied by the geometrical, energetical, MESP, frontier molecular orbitals, and NBO analysis using the first-principles density functional theory (DFT) calculations. The maximum CO 2 absorption efficiency of almost 97% was achieved for the blend consisting of 67% of AQ_NH 3 and 33% of MEA. Moreover, AQ_MEA and blend of AQ_NH 3 , DMEA, and C 2 mim BF 4 ionic liquid showed 96% and 94% CO 2 absorption efficiency, respectively.

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Experimental investigation of density, viscosity, and surface tension of aqueous tetrabutylammonium-based ionic liquids

Cited by 18 publications

References 40 publications

Experimental Investigation on Thermophysical Properties of Ammonium-Based Protic Ionic Liquids and Their Potential Ability towards CO2 Capture

Experimental Investigation on Thermophysical Properties of Ammonium-Based Protic Ionic Liquids and Their Potential Ability towards CO2 Capture

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

A comprehensive multidisciplinary investigation on CO2 capture from diesel engine

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Experimental investigation of density, viscosity, and surface tension of aqueous tetrabutylammonium-based ionic liquids

Cited by 18 publications

References 40 publications

Experimental Investigation on Thermophysical Properties of Ammonium-Based Protic Ionic Liquids and Their Potential Ability towards CO2 Capture

Experimental Investigation on Thermophysical Properties of Ammonium-Based Protic Ionic Liquids and Their Potential Ability towards CO2 Capture

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

A comprehensive multidisciplinary investigation on CO2 capture from diesel engine

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Product

Resources

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