Liquid-Vapor Phase Equilibria of the Neon-Normal Hydrogen System

Heck, C. K.; Barrick, P. L.

doi:10.1007/978-1-4757-0522-5_38

Cited by 15 publications

(8 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We used the experimental measurements by Streett and Jones (1965) 54 and Heck and Barrick (1966). 55 Streett and Jones found the upper critical solution temperature for the LLE to be 28.96 ± 0.04 K, and measured azeotropes for temperatures up to 31.5 K. We also mention that Simon (1963) 56 reported measurements on parahydrogen-neon system at the triple-point temperature of neon (24.56 K); these data have not been used.…”

Section: B the Hydrogen-neon Mixturementioning

confidence: 99%

See 1 more Smart Citation

Equation of state and force fields for Feynman–Hibbs-corrected Mie fluids. II. Application to mixtures of helium, neon, hydrogen, and deuterium

Aasen

Hammer

Müller

et al. 2020

The Journal of Chemical Physics

View full text Add to dashboard Cite

We extend the SAFT-VRQ Mie equation of state, previously developed for pure fluids [Aasen et al., J. Chem. Phys. 151, 064508 (2019)], to fluid mixtures of particles interacting via Mie potentials with Feynman-Hibbs quantum corrections of first (Mie-FH1) or second order (Mie-FH2). This is done using a third-order Barker-Henderson expansion of the Helmholtz energy from a non-additive hard-sphere reference system. We survey existing experimental measurements and ab initio calculations of thermodynamic properties of mixtures of neon, helium, deuterium and hydrogen, and use them to optimize the Mie-FH1 and Mie-FH2 force fields for binary interactions. Simulations employing the optimized force fields are shown to follow the experimental results closely over the entire phase envelopes. SAFT-VRQ Mie reproduces results from simulations employing these force fields, with the exception of near-critical states for mixtures containing helium. This breakdown is explained in terms of the extremely low dispersive energy of helium, and the challenges inherent in current implementations of the Barker-Henderson expansion for mixtures. The interaction parameters of two cubic equations of state (SRK, PR) are also fitted to experiments, and used as performance benchmarks. There are large gaps in the ranges and properties that have been experimentally measured for these systems, making the force fields presented especially useful.

show abstract

Section: B the Hydrogen-neon Mixturementioning

confidence: 99%

“…3c and 3d). Crosses are experimental measurements, 54,55 circles are simulation results, and lines are calculations with SAFT-VRQ Mie (Figs. 3a-3d) or SRK (Figs.…”

Section: Figmentioning

confidence: 99%

Equation of state and force fields for Feynman–Hibbs-corrected Mie fluids. II. Application to mixtures of helium, neon, hydrogen, and deuterium

Aasen

Hammer

Müller

et al. 2020

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

“…Ar-CHu System. Since the object is to show that phase equilibrium data of the quality generated by Streett (1965Streett ( , 1968 and by Heck (1966) are satisfactory for estimating values of HE, it was necessary to investigate an additional system, with comparable experimental methods, for which a calorimetrically determined value of HE was available. To this end, the Ar-CH4 system was chosen for further study.…”

Section: Resultsmentioning

confidence: 99%

“…This would permit simultaneous observation of both the production of events in hydrogen and the decay of neutral secondaries in a medium of suitable -conversion length. The feasibility of these modes of operation was realized when the determination of hydrogen-neon phase equilibrium properties (Heck and Barrick, 1966;Simon, 1963; Streett and Jones, 1965) showed that first, the 30% neon in liquid hydrogen mixture could exist at pressures and temperatures suitable for actual chamber operation without liquid phase separation, and second, that liquid hydrogen and a liquid hydrogen-neon mixture, separated by an impermeable membrane, could coexist at the same conditions of pressure and temperature. Design considerations for such applications also require, among other mixture properties, HE, the heat of mixing.…”

mentioning

confidence: 99%

Heat of Mixing Derived from Liquid-Vapor Equilibrium Data: A Study of the Argon-Methane, Normal Hydrogen-Neon, and Normal Deuterium-Neon Systems

Duncan¹,

Hiza²

1972

Ind. Eng. Chem. Fund.

View full text Add to dashboard Cite

A study of three binary systems of interest in cryogenics was undertaken to demonstrate that an acceptable estimate of the heat of mixing may be derived from carefully measured equilibrium liquid and vapor phase compositions employing conventional gas analysis techniques. New data for the Ar-ChU system are presented from which derived excess Gibbs free energy and heat of mixing values were obtained. These data and derived properties are shown to be in good agreement with comparable data available in the literature. Excess Gibbs free energy and heat of mixing values were derived from phase equilibrium data available in the literature for the nHa-Ne and nD2-Ne systems in the region of complete liquid phase miscibility.Both of these systems exhibit azeotrope formation in the region studied. For the nH2-Ne system, results obtained from the two different sets of data used also were in good agreement.

show abstract

“…The hydrogeneneon mixture cycle is simulated entirely in the gas phase. Since no binary interaction coefficients are provided for cryogenic hydrogen-neon mixtures in the simulator, the interaction coefficients of the PR and SRK equations were fitted to available vapor-liquidequilibrium VLE data [50,51]. The VLE calculations for the hydrogeneneon mixture with the fitted interaction coefficient of the EOS of PR performed satisfyingly [23].…”

Section: Fluid Propertiesmentioning

confidence: 99%