Analysis of System Methanol-Ethylene Glycol-Water

Conrad, Frank; Flint, M. C.; Meyer, R.; Sjoberg, J. W.

doi:10.1021/ac60065a021

Cited by 3 publications

(2 citation statements)

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“…Experimental density data of EG‐MeOH/water ternary system at 25°C [ Conrad et al ., ; Mikhail and Kimel , ; Ray and Nemethy , ; Lee et al ., ] can be correlated using

ρ = ρ_{b} (1 + \sum_{j = 1}^{3} \sum_{i = 1}^{2} β_{i j} χ_{i}^{j})

where ρ b is the pure water density and β ij values are the coefficients of density variation with concentration given by: β 11 = 0.381016, β 21 = −0.251612, β 12 = −0.446894, β 22 = 0.037877, β 13 = 0.184493, and β 23 = 0.002322. This density function predicts the mixture density with a maximum error of less than 1%.…”

Section: Base‐state Density Profilesmentioning

confidence: 99%

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On the choice of analogue fluids in CO₂ convective dissolution experiments

Raad

Emami-Meybodi

Hassanzadeh

2016

Water Resources Research

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Mixtures of ethylene glycol and methanol (EG‐MeOH) have been used as an analogue system (i.e., EG‐MeOH/water) in recent experiments in the context of convective dissolution of CO2 in deep saline aquifers. We have conducted a linear stability analysis of a gravitationally unstable diffusive boundary layer as well as direct numerical simulation of convective mixing involved in dissolution of EG‐MeOH species in water. We provide new evidences that EG‐MeOH does not resemble the dynamics of convective instabilities and subsequent mixing associated with dissolution of CO2 in water. It is found that there are fundamental differences in the evolution of the buoyancy‐driven instability and dynamics of convective mixing between CO2/water and a typical EG‐MeOH/water analogue system. Our results show that for a constant Rayleigh number, the onset of convective instabilities for EG‐MeOH/water can be different by an order of magnitude as compared with CO2/water. In addition, EG‐MeOH/water system reveals different dynamics associated with the convective mixing as compared to CO2/water system. This study improves our understanding of the instability behavior of analogue systems, their proper selection, and motivates further experiments.

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“…Experimental density data of EG‐MeOH/water ternary system at 25°C [ Conrad et al ., ; Mikhail and Kimel , ; Ray and Nemethy , ; Lee et al ., ] can be correlated using

ρ = ρ_{b} (1 + \sum_{j = 1}^{3} \sum_{i = 1}^{2} β_{i j} χ_{i}^{j})

Section: Base‐state Density Profilesmentioning

confidence: 99%

“…Experimental density data of EG-MeOH/water ternary system at 258C [Conrad et al, 1952;Mikhail and Kimel, 1961;Ray and Nemethy, 1973;Lee et al, 1990] can be correlated using…”

Section: Base-state Density Profilesmentioning

confidence: 99%

On the choice of analogue fluids in CO₂ convective dissolution experiments

Raad

Emami-Meybodi

Hassanzadeh

2016

Water Resources Research

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2.4.3 References for 2.4

Synowietz¹

Nonaqueous Systems and Ternary Aqueous Systems

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Crystal structures of ethylene glycol and ethylene glycol monohydrate

Fortes¹,

Suard²

2011

The Journal of Chemical Physics

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We have carried out a neutron powder diffraction study of deuterated ethylene glycol (1,2-ethanediol), and deuterated ethylene glycol monohydrate with the D2B high-resolution diffractometer at the Institut Laue-Langevin. Using these data, we have refined the complete structure, including all hydrogen atoms, of the anhydrous phase at 220 K. In addition, we have determined the structure of ethylene glycol monohydrate at 210 K using direct space methods. Anhydrous ethylene glycol crystallizes in space-group P2(1)2(1)2(1) with four formula units in a unit-cell of dimensions a = 5.0553(1) Å, b = 6.9627(1) Å, c = 9.2709(2) Å, and V = 326.319(8) Å(3) [ρ(calc)(deuterated) = 1386.26(3) kg m(-3)] at 220 K. Ethylene glycol monohydrate crystallizes in space-group P2(1)/c with four formula units in a unit-cell of dimensions a = 7.6858(3) Å, b = 7.2201(3) Å, c = 7.7356(4) Å, β = 92.868(3)°, and V = 428.73(2) Å(3) [ρ(calc)(deuterated) = 1365.40(7) kg m(-3)] at 210 K. Both the structures are characterized by the gauche conformation of the ethylene glycol molecule; however, the anhydrous phase contains the tGg' rotamer (or its mirror, g'Gt), whereas the monohydrate contains the gGg' rotamer. In the monohydrate, each water molecule is tetrahedrally coordinated, donating two hydrogen bonds to, and accepting two hydrogen bonds from the hydroxyl groups of neighboring ethylene glycol molecules. There are substantial differences in the degree of weak C-D···O hydrogen bonding between the two crystals, which calls into question the role of these interactions in determining the conformation of the ethylene glycol molecule.

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Analysis of System Methanol-Ethylene Glycol-Water

Abstract: In studying the vapor-liquid equilibrium relations of the system methanol-ethylene glycol-water it was necessary to develop a method of quickly analyzing a mixture of these three components. Mixtures

Cited by 3 publications

References 6 publications

On the choice of analogue fluids in CO₂ convective dissolution experiments

On the choice of analogue fluids in CO₂ convective dissolution experiments

2.4.3 References for 2.4

Crystal structures of ethylene glycol and ethylene glycol monohydrate

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Analysis of System Methanol-Ethylene Glycol-Water

Abstract: In studying the vapor-liquid equilibrium relations of the system methanol-ethylene glycol-water it was necessary to develop a method of quickly analyzing a mixture of these three components. Mixtures

Cited by 3 publications

References 6 publications

On the choice of analogue fluids in CO2 convective dissolution experiments

On the choice of analogue fluids in CO2 convective dissolution experiments

2.4.3 References for 2.4

Crystal structures of ethylene glycol and ethylene glycol monohydrate

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On the choice of analogue fluids in CO₂ convective dissolution experiments

On the choice of analogue fluids in CO₂ convective dissolution experiments