Fluid Phase Equilibria of Binary Mixtures with Supercritical Solvents with in-situ Concentration Measurements by Raman Spectroscopy

Stratmann, A.; Schweiger, G.

doi:10.1016/b978-044451574-2/50004-3

Cited by 2 publications

(3 citation statements)

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“…To clarify the dependence of the CO 2 solubility with the structure of the oil, in Figure its values are plotted for several lubricants (squalane, PAOs, PAGs, and esters). The experimental data were taken from Stratmann and Schweiger in the case of squalane and from Hauk for the other lubricants. In this figure, it can be seen that carbon dioxide has the lowest solubilities in polyalphaolefine (PAO) and in squalane.…”

Section: Resultsmentioning

confidence: 99%

“…Solubility of carbon dioxide at 313.15 K in mass fraction for: Δ, PEBE8 (640.93 g·mol −1 ); *, squalane (422.82 g·mol −1 ); ▲, diethyl methylmalonate (174.18 g·mol −1 ); ●, hexyl methacrylate (170.25 g·mol −1 ); ○, ethyl butyrate (116.16 g·mol −1 ); ◻, isopropyl acetate (102.1 g·mol −1 ); ◼, ethyl acetate (88.12 g·mol −1 ); ★, PAO; ☆, PAG-A; +, PAG-B; ×, ester 1 …”

Section: Resultsmentioning

confidence: 99%

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Solubility of Carbon Dioxide in Two Pentaerythritol Ester Oils between (283 and 333) K

et al. 2008

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In this work, the solubility of carbon dioxide, CO 2 , in pentaerythritol tetrapentanoate (PEC5) and in pentaerythritol tetra(2-ethylhexanoate) (PEBE8) has been performed from (283 to 333) K and pressures up to 7 MPa in a new high-pressure gas solubility apparatus. The results show that in the present analyzed range CO 2 is highly soluble in these oils and that the solubility expressed as CO 2 mole fraction is practically not dependent on the branching of the acid chain, whereas it increases slightly with the length of the PE acid chains in the present range of compositions. The gas solubility data were satisfactorily correlated with the Soave-Redlich-Kwong (SRK) equation of state (EOS) using the conventional quadratic mixing rule with two interaction parameters for each temperature.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Solubility of Carbon Dioxide in Two Pentaerythritol Ester Oils between (283 and 333) K

et al. 2008

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“…While a number of studies at high temperatures up to 1000 K have been reported, studies at high pressures, or under supercritical conditions, are less common [341]. Nevertheless, some applications to supercritical fluids have been reported, besides those on ammonothermal systems, including studies of phase equilibria in fluid mixtures [353] and contributions to revealing structural organization in binary mixtures, with notable effects on diffusion processes [352].…”

Section: Raman Spectroscopymentioning

confidence: 99%

Ammonothermal Crystal Growth of Functional Nitrides for Semiconductor Devices: Status and Potential

Wostatek,

Chirala,

Stoddard

et al. 2024

Materials

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The state-of-the-art ammonothermal method for the growth of nitrides is reviewed here, with an emphasis on binary and ternary nitrides beyond GaN. A wide range of relevant aspects are covered, from fundamental autoclave technology, to reactivity and solubility of elements, to synthesized crystalline nitride materials and their properties. Initially, the potential of emerging and novel nitrides is discussed, motivating their synthesis in single crystal form. This is followed by a summary of our current understanding of the reactivity/solubility of species and the state-of-the-art single crystal synthesis for GaN, AlN, AlGaN, BN, InN, and, more generally, ternary and higher order nitrides. Investigation of the synthesized materials is presented, with a focus on point defects (impurities, native defects including hydrogenated vacancies) based on GaN and potential pathways for their mitigation or circumvention for achieving a wide range of controllable functional and structural material properties. Lastly, recent developments in autoclave technology are reviewed, based on GaN, with a focus on advances in development of in situ technologies, including in situ temperature measurements, optical absorption via UV/Vis spectroscopy, imaging of the solution and crystals via optical (visible, X-ray), along with use of X-ray computed tomography and diffraction. While time intensive to develop, these technologies are now capable of offering unprecedented insight into the autoclave and, hence, facilitating the rapid exploration of novel nitride synthesis using the ammonothermal method.

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Fluid Phase Equilibria of Binary Mixtures with Supercritical Solvents with in-situ Concentration Measurements by Raman Spectroscopy

Cited by 2 publications

References 85 publications

Solubility of Carbon Dioxide in Two Pentaerythritol Ester Oils between (283 and 333) K

Solubility of Carbon Dioxide in Two Pentaerythritol Ester Oils between (283 and 333) K

Ammonothermal Crystal Growth of Functional Nitrides for Semiconductor Devices: Status and Potential

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