Experimental determination of carbon dioxide and nitrous oxide co-solubility in liquid oxygen

Stefani, Vania De; Baba-Ahmed, A.; Richon, Dominique

doi:10.1016/s0378-3812(03)00007-4

Cited by 11 publications

(10 citation statements)

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“…The former represents the methodologies in which synthetic mixtures, with known compositions, are loaded in an equilibrium cell and the system’s pressure and temperature conditions are changed until the mixture undergoes a phase change. The latter signifies the methods for which samples are acquired from one or more phases and their compositions are analyzed. …”

Section: Introductionmentioning

confidence: 99%

Visual Measurements of Solid–Liquid Equilibria and Induction Times for Cyclohexane + Octadecane Mixtures at Pressures to 5 MPa

et al. 2017

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A specialized apparatus designed for visual measurements of solid-liquid equilibrium (SLE) and solid-liquid-vapor equilibrium (SLVE) was constructed and used to measure liquidus (melting) temperatures in binary mixtures of cyclohexane (C 6 H 12) and octadecane (C 18 H 38) across the entire range of composition and at pressures from about (0.004 to 5.3) MPa. A Peltier-cooled copper tip immersed in the liquid mixture was used to determine both freezing and melting temperatures by varying the temperature of the copper tip relative to the stirred, bulk liquid. With the bulk liquid held at the mixture's SLVE temperature, the induction time required to nucleate solid octadecane decreased exponentially as the subcooling of the copper tip increased, halving approximately every 0.25 K. At higher pressures, while the melting temperature of pure cyclohexane (cyC 6) increased by about 0.55 KMPa-1 , at x cyC6 = 0.5675 it increased by only 0.15 KMPa-1. The new data were compared with measurements reported in the literature, empirical correlations describing those literature data, and the predictions of models based on cubic equations of state (EOS), including the Peng-Robinson Advanced (PRA) EOS implemented in the software Multiflash. The best description of the data was achieved by adjusting the binary interaction parameter in the PRA model from 0 to-0.0324, which reduced the deviation of the SLVE data at the eutectic point (x cyC6 0.95) from (12.8 to-0.2) K. Although the accuracy of predictions made with the SLVE-tuned PRA EOS deteriorated slightly at pressures around 5 MPa, they were still as good as, or better, than the empirical correlations available for this system. Furthermore, the SLVE-tuned PRA EOS was more accurate at describing literature VLE data for this binary than the default PRA EOS, reducing the r.m.s. deviation in bubble temperature predictions from (6.7 to 0.67) K.

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Section: Introductionmentioning

confidence: 99%

Visual Measurements of Solid–Liquid Equilibria and Induction Times for Cyclohexane + Octadecane Mixtures at Pressures to 5 MPa

et al. 2017

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“…The effect of equilibrium pressure on CO 2 solubility measured in this experiment is the same as the results of some existing studies. 24,25 4.2. Theoretical Calculations.…”

Section: Resultsmentioning

confidence: 99%

“…Both equilibrium temperature and the pressure in the equilibrium state have an effect on CO 2 solubility. Although relevant studies 24,25 and the experimental results in this paper show that the influence of equilibrium pressure on the solubility of CO 2 is not great, it still has an influence to some extent, making the curves not smooth enough as they are only plotted with temperature.…”

Section: Resultsmentioning

confidence: 99%

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Experimental and Theoretical Study of CO₂ Solubility in Liquid CH₄/H₂ Mixtures at Cryogenic Temperatures

Lin

2021

J. Chem. Eng. Data

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Methane-rich industrial byproducts, such as coke oven gas (COG) and synthetic ammonia exhaust tail gas, are often regarded as promising sources of unconventional natural gas. The design spec for liquefaction of these kinds of unconventional natural gas is quite different from that of conventional natural gas due to the presence of some special substances, such as hydrogen. In this work, CO2 solubility in liquid CH4/H2 mixtures is measured utilizing a static solid–liquid equilibrium (SLE) experimental apparatus. The experiments are carried out at cryogenic temperatures between 90 and 150 K in the pressure range of about 1.7–5.4 MPa. The results are compared with calculations based on the GERG-2008 and Peng–Robinson (PR) equations of state. It is found that, compared with the solubility of CO2 in pure methane, the existence of hydrogen makes CO2 solubility increase significantly between −160 and −145 °C and decrease significantly at temperatures above −140 °C. The results provide the basis for the CO2 purification system of the coke oven gas and synthetic natural gas liquefaction plant.

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“…Capillary samplers have been used in the field of low temperature phase equilibria down to 70 K 13,14 for studies related but not limited to the solids cosolubility in liquid oxygen, 15 solubility measurements in potentially hazardous binary mixture such as hydrocarbon−oxygen systems 16 and also for the phase equilibria in the presence of gas hydrates. 17 The materials used for the construction of the equipment in this work, allow working with hydrogen mixtures.…”

Section: Introductionmentioning

confidence: 99%

Design of Equilibrium Cells for Phase Equilibria and PVT Measurements in Large Ranges of Temperatures and Pressures. I. Vapor–Liquid–Liquid Equilibria

et al. 2016

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Acquiring accurate experimental thermodynamic data is very useful for the development of models and chemical processes. Although there are plenty of data in the scientific literature, there are still many missing. In fact, many of the easier measurements have been made, and far more of the remaining ones deal with either complex systems or extreme conditions. Clearly new adequate equipment for acquiring such data are welcome. For these purposes, advice coming from several decades of equipment design experience are exposed herein. After defining the aim pursued and consequently the type of desired thermodynamic quantity, it is necessary to take into account all physical and chemical constraints: viscosity, density, corrosive power of studied chemical systems, temperature, pressure together with other important points such as miniaturization, efficient stirring, avoiding both dead volume and polymer sealing. The other aim of this paper is to present a high temperature and high pressure apparatus capable of measuring the phase equilibria of systems exhibiting vapor–liquid–liquid behavior. The apparatus designed and built consists mainly of an equilibrium cell (70 cm3), novel high temperature, and high pressure samplers and a gas chromatograph. A detailed description of the apparatus is presented. Preliminary measurements are presented for propane in water, cyclohexane in water, and water in cyclohexane up to 498.8 K. In addition the solubility of 2-methylfuran in water up to 413 K and 1548 kPa was measured.

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Experimental determination of carbon dioxide and nitrous oxide co-solubility in liquid oxygen

Cited by 11 publications

References 2 publications

Visual Measurements of Solid–Liquid Equilibria and Induction Times for Cyclohexane + Octadecane Mixtures at Pressures to 5 MPa

Visual Measurements of Solid–Liquid Equilibria and Induction Times for Cyclohexane + Octadecane Mixtures at Pressures to 5 MPa

Experimental and Theoretical Study of CO₂ Solubility in Liquid CH₄/H₂ Mixtures at Cryogenic Temperatures

Design of Equilibrium Cells for Phase Equilibria and PVT Measurements in Large Ranges of Temperatures and Pressures. I. Vapor–Liquid–Liquid Equilibria

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Experimental determination of carbon dioxide and nitrous oxide co-solubility in liquid oxygen

Cited by 11 publications

References 2 publications

Visual Measurements of Solid–Liquid Equilibria and Induction Times for Cyclohexane + Octadecane Mixtures at Pressures to 5 MPa

Visual Measurements of Solid–Liquid Equilibria and Induction Times for Cyclohexane + Octadecane Mixtures at Pressures to 5 MPa

Experimental and Theoretical Study of CO2 Solubility in Liquid CH4/H2 Mixtures at Cryogenic Temperatures

Design of Equilibrium Cells for Phase Equilibria and PVT Measurements in Large Ranges of Temperatures and Pressures. I. Vapor–Liquid–Liquid Equilibria

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Experimental and Theoretical Study of CO₂ Solubility in Liquid CH₄/H₂ Mixtures at Cryogenic Temperatures