Some Physical Properties of Sulfur Hexafluoride

Miller, Henry C.; Verdelli, L. S.; Gall, J. F.

doi:10.1021/ie50497a037

Cited by 22 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nitrogen is a common impurity in SF6 and is highly soluble in the liquid phase. The Bunsen absorption coefficient (T) of N2 in liquid SF6 was measured by Miller et al [22]. They found (300 K) = 2 atm (202 kPa), which, when converted to a Henry's law volatility constant, yields KH(300 K) = 10 MPa or 10 Pa•(mol N2/mol SF6) 1 when expressed as the partial pressure of N2 in the vapor phase divided by the mole fraction of N2 dissolved in the liquid phase at equilibrium.…”

Section: Solubility Of Nitrogenmentioning

confidence: 99%

Realizations of the Triple Point of Sulfur Hexafluoride in Transportable and Refillable Cells

Tew

Quelhas

2018

J. RES. NATL. INST. STAN.

View full text Add to dashboard Cite

The Minamata Convention on Mercury has created a near-term need to develop alternative fixed points to replace the mercury triple point (Hg TP) for calibration of standard platinum resistance thermometers (SPRTs) on the International Temperature Scale of 1990 (ITS-90). The sulfur hexafluoride (SF6) TP is a good candidate to provide adequate “drop-in compatible” replacements for the lowest costs. We report our first results of SF6 TP realizations performed at the National Institute of Standards and Technology (NIST) using a new series of transportable and refillable triple-point cells. The melting curves are presented at various melted fractions F and compared to evaluate the reproducibility and overall uncertainty for the realizations. We obtained a TP temperature of 223.55587(33) K at F = 50 % and 223.55607(35) K at F = 100 % as a weighted average of realizations using two adiabatic-type cells and two immersion-type cells. (Unless otherwise stated, uncertainties are standard uncertainties corresponding to a 68 % confidence level.) Temperatures were derived using a combination of five different SPRTs as calibrated at NIST on the ITS-90. The data were evaluated over a region of the melting plateau for melted fraction F between 30 % ≤ F ≤ 80 % with a 0.2 mK wide melting range. The results from the immersion-type cells were used to derive an experimental value for the SF6 TP static head correction of −11.6(1.7) mK/m. This value implies an initial slope of the pressure-temperature (p-T) equilibrium melting line of 1.55 MPa/K, whichis in agreement with the value predicted via the Clapeyron equation. The uncertainties of these initial SF6 TP realizations are limitedby uncertainty in the realization of the ITS-90 (0.25 mK) and, to a lesser extent, static pressure head effects and chemical impurities.

show abstract

Section: Solubility Of Nitrogenmentioning

confidence: 99%

Realizations of the Triple Point of Sulfur Hexafluoride in Transportable and Refillable Cells

Tew

Quelhas

2018

J. RES. NATL. INST. STAN.

View full text Add to dashboard Cite

show abstract

“…The preliminary cooling temperature of the feed gas after compression is set at 313 K. The heat of hydrate formation is [17]. The same temperature is assumed for the liquefaction separation process at 278 K. The liquefaction pressure is 17.7 bar, corresponding to the liquefaction pressure of SF 6 , 5.31 bar at 278 K [17,18]. The latent heat of liquefaction of SF 6 is 166.6 kJ/mol [17,18].…”

Section: Separation Process Of Sf 6 Sulfur Hexafluoride From the Mixtmentioning

confidence: 99%

“…The same temperature is assumed for the liquefaction separation process at 278 K. The liquefaction pressure is 17.7 bar, corresponding to the liquefaction pressure of SF 6 , 5.31 bar at 278 K [17,18]. The latent heat of liquefaction of SF 6 is 166.6 kJ/mol [17,18]. The preliminary cooling temperature after compression is set to 358 K. Table 5 summarizes the operational conditions, and Table 6 shows the breakdowns of the energy consumption.…”

Section: Separation Process Of Sf 6 Sulfur Hexafluoride From the Mixtmentioning

confidence: 99%

Energy consumption estimation for greenhouse gas separation processes by clathrate hydrate formation

Tajima

Yamasaki

Kiyono

2004

Energy

135

View full text Add to dashboard Cite

“…The deviation curve for SF, shown inFigure 28is based on the triple point of 2.20 atm. at -51 "C. determined by Miller, Verdelli, and Gall(75) and a critical point of 37,193 atm. at 45.642 °C, determined by Wentorf(106).…”

mentioning

confidence: 93%

The Vapor Pressures of 30 Inorganic Liquids Between One Atmosphere and the Critical Point

Edwards¹

1963

View full text Add to dashboard Cite

UCRL-7167 which we used was the necessity for a general correspondence of the maximum and minimum of the deviation curve with those for similar substances. Then, since only two data are necessary among items 2, 3, and 4, the choice of either T or P fixed the other. The considerations involved in the choices c c of T and P will be discussed below in connection with the specific comc c ^ pounds involved. B. SHAPE OF CURVES For the generalized comparison of the deviation curves, the temperature range between the boiling point and the critical point was normalized on a 1/T basis and expressed as percent, where

show abstract

Some Physical Properties of Sulfur Hexafluoride

Cited by 22 publications

References 0 publications

Realizations of the Triple Point of Sulfur Hexafluoride in Transportable and Refillable Cells

Realizations of the Triple Point of Sulfur Hexafluoride in Transportable and Refillable Cells

Energy consumption estimation for greenhouse gas separation processes by clathrate hydrate formation

The Vapor Pressures of 30 Inorganic Liquids Between One Atmosphere and the Critical Point

Contact Info

Product

Resources

About