Measurement and correlation of physical properties of aqueous solutions of tetrabutylammonium hydroxide, piperazine and their aqueous blends

Safdar, Rizwan; Omar, Abdul Aziz; Ismail, Lukman; Bari, Arhama; Lal, Bhajan

doi:10.1016/j.cjche.2015.08.006

Cited by 13 publications

(10 citation statements)

References 39 publications

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“…The graph shows that when the concentration of TBAAc and TBAOH in aqueous MEA mixtures increases, so does the density. This is because adding IL to aqueous MEA increases the volume of the IL ion pair, which is much larger than the volume of MEA and H 2 O molecules, reducing the density 40,41 . When the IL content was raised, the density of MEA‐TBABr mixtures increased.…”

Section: Resultsmentioning

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%

“…The thermal expansion coefficient (

α_{p}

) of solvent mixtures was determined using density data 26,40 0.25emαp0.25em is critical for screening sustainable solvents for the CO 2 capture process.…”

Section: Resultsmentioning

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 second is that the effect of the viscosity of the reaction solution increased by the Bu 4 NCl addition. Aqueous solutions of Bu 4 NOH exhibit viscosity much higher than that of water [25] and the Bu 4 NCl addition is expected to further increase the viscosity of the reaction solutions. Our previous report has shown that oxygen supply to the reaction solution is indispensable for the production of vanillin and vanillic acid (Yamamoto et al, 2016 [23]).…”

Section: Effects Of Inorganic Saltmentioning

confidence: 99%

“…It is especially important to clarify what improvement will be made when their concentrations are increased to more than 1. 25 [24]. The particle size of the Japanese cedar (Cryptomeria japonica) wood flour was 90-180 µm.…”

Section: Introductionmentioning

confidence: 99%

Vanillin production from native softwood lignin in the presence of tetrabutylammonium ion

et al. 2018

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Vanillin is one of the industrially important compounds that can be produced from lignin. This study presents production of vanillin and vanillic acid (oxidized form of vanillin) through aerobic oxidation of Japanese cedar (Cryptomeria japonica) at 120 °C for 72 h in aqueous alkali solutions with several Bu 4 N + and OH − concentrations (1.25, 2.50, and 3.75 mol/L), where Bu 4 N + is an enhancer of the vanillin formation reported in our previous study. The concentrations of Bu 4 N + and OH − were adjusted by the additions of Bu 4 NCl and solid NaOH into the base medium Bu 4 NOH•30H 2 O, which forms 1.25 mol/L aqueous solution of Bu 4 NOH at the elevated temperature. Vanillin and vanillic acid were produced with the maximum yields of 21.0 and 1.7 wt% (lignin-base), respectively, at the 1.25 mol/L Bu 4 N + and 3.75 mol/L OH − concentrations. This vanillin yield is close to that obtained by the alkaline nitrobenzene oxidation (26.5 wt%), indicating significantly high selectivity of our lignin degradation with Bu 4 N + toward vanillin formation. We also proposed a novel Bu 4 NOH•30H 2 O-free reaction medium, where Bu 4 NOH•30H 2 O as the base medium were substituted with an aqueous solution of Bu 4 NCl and NaOH to avoid using expensive Bu 4 NOH•30H 2 O. The treatment of the Japanese cedar with this alternative medium exhibited the moderately decreased vanillin yield of 14.6 wt%, which is, however, much higher than the vanillin yield obtained with a simple 1.25 mol/L NaOH solution.

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“…Changes in these properties will affect the mass transfer at the bottom of the absorber and the reaction kinetics in the stripper, thereby increasing the energy demand of CCS. Therefore, it is necessary to measure the physical properties during the absorption and desorption 25–30 . From the extensive literature survey, it was noted that the regeneration study of solvents is less reported, especially for blended solvent composed of MEA and IL.…”

Section: Introductionmentioning

confidence: 99%

Regeneration of CO₂‐rich aqueous amine‐ionic liquid blends in CO₂ capture process

Perumal

Jayaraman

2021

Greenhouse Gases

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In this present work, solvent regeneration of CO2‐rich aqueous solvent blends containing Monoethanolamine (MEA) and Ionic liquids was studied experimentally. The ionic liquids (ILs) used are tetrabutylammonium acetate [TBA][OAC] and tetrabutylammonium bromide [TBA][Br]. The solvent mixture composition of ILs are 2, 5, 10 wt% and their respective MEA as 28, 25, 20 wt%. CO2 absorption and desorption process were performed using solvent blends. The recovery of solvent was performed for three different temperatures 358, 368 and 373 K. The findings reveal that solvent blends of MEA with [TBA][Br] exhibit higher regeneration efficiency and lower regeneration energy than MEA with [TBA][OAC] blends with a minimum composition of 2 wt% [TBA][Br]. Energy consumption for recovery of 2 wt% [TBA][Br] blend with 28 wt% MEA was found to be 65.66 KJ mole−1 of CO2 which is 41.97% less than 30 wt% MEA. Furthermore, physicochemical properties such as pH, density, viscosity, carbon loading and surface tension have been measured before and after CO2 absorption and desorption process. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Measurement and correlation of physical properties of aqueous solutions of tetrabutylammonium hydroxide, piperazine and their aqueous blends

Cited by 13 publications

References 39 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

Vanillin production from native softwood lignin in the presence of tetrabutylammonium ion

Regeneration of CO₂‐rich aqueous amine‐ionic liquid blends in CO₂ capture process

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Measurement and correlation of physical properties of aqueous solutions of tetrabutylammonium hydroxide, piperazine and their aqueous blends

Cited by 13 publications

References 39 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

Vanillin production from native softwood lignin in the presence of tetrabutylammonium ion

Regeneration of CO2‐rich aqueous amine‐ionic liquid blends in CO2 capture process

Contact Info

Product

Resources

About

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

Regeneration of CO₂‐rich aqueous amine‐ionic liquid blends in CO₂ capture process