Specific Volumes of <i>n</i>-Alkanes.

Doolittle, Arthur K.

doi:10.1021/je60021a048

Cited by 148 publications

(63 citation statements)

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“…The samples were further distilled and degassed before use and the purity determined chromatographically was found to be better than 99.9 %. The density of liquid n-heptane has been taken from the work of Doolittle [21] and has a reported uncertainty of _ 0.2 %. Table III lists the results of the measurements of the viscosity of n-heptane determined with the high-pressure viscometer for three isotherms, whereas the values determined in the low-pressure for two isotherms have been reported earlier.…”

Section: Resultsmentioning

confidence: 99%

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Vibrating-wire viscometers for liquids at high pressures

et al. 1992

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The design and operation of two independent vibrating-wire viscometers are described. The instruments are intended for operation in the liquid phase at pressures up to 300 MPa and have been designed specifically for this purpose using the detailed theory of the device. Extensive evidence is adduced to demonstrate that the operation of the viscometers is consistent with the theory. Although the instruments attain a precision in viscosity measurements of • when used in an absolute mode the accuracy that can be achieved is no better than __+3%. However, if the instrument is calibrated for two welldefined instrumental parameters, the uncertainty in the reported viscosity is improved to _+0.5%. The results of measurements of the viscosity of normal heptane in the temperature range 303 to 348 K at pressures up to 250 MPa made with one of the viscometers are reported. The results are shown to be totally consistent with measurements reported earlier using the instrument designed for lower pressures.

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Section: Resultsmentioning

confidence: 99%

“…Thus, we obtained from the inequalities expressed by Eq. (5), and co ~ #/e2pR 2 (20) co > e#/pR 2 (21) which provide upper and lower bounds in the space (R, co) for specific ranges of p and p for the fluid as well as the obvious condition e ~< 1. In addition, the condition given by Eq.…”

Section: Design Constraintsmentioning

confidence: 99%

Vibrating-wire viscometers for liquids at high pressures

et al. 1992

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“…In this project we derive a new set of pure-component PC-SAFT parameters by fitting the equation to high temperature, high pressure (HTHP) density data present in the literature [13,23,55,65,66] that covers almost the entire pressure and temperature ranges of interest for deep reservoirs. Sub-critical density data are not used to obtain these new parameters.…”

Section: Hthp Pcsaftmentioning

confidence: 99%

“…, toluene [23], n-heptane [55] and n-decane [23] Table 3: Data obtained in this study for the calibration of the transducer used with the view cell (P view cell) against the Viatran-calibrated pressure transducer (P Viatran ) and a Heise gauge at room temperature 18 Table 4: Decane density data obtained at 250°C at VCU and estimates of the error in the density from each term in Equation (8). Only select data are shown to demonstrate the impact of each term.…”

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confidence: 99%

An Assessment of Research Needs Related to Improving Primary Cement Isolation of Formations in Deep Offshore Wells

Tapriyal¹,

Enick²,

McHugh³

et al. 2012

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The National Energy Technology Laboratory (NETL) conducts cutting-edge energy research and technology development and analyzes energy systems and international energy issues for the U.S. Department of Energy. The NETL-Regional University Alliance (NETL-RUA) is an applied research collaboration that combines NETL's energy research expertise with the broad capabilities of five nationally recognized, regional universities: Carnegie Mellon University (CMU), The Pennsylvania State University (PSU), the University of Pittsburgh (Pitt), Virginia Tech, and West Virginia University (WVU), and the engineering and construction expertise of an industry partner (URS). The NETL-RUA leverages its expertise with current fossil energy sources to discover and develop sustainable energy systems of the future, introduce new technology, and boost economic development and national security. Cover Illustration:The image provides an inside view of the density cell, which is capable of getting density data at 500°F and 35,000 psi. The left side image shows the bubble point of the gas. The tiny bubbles can be seen at the top center of the cell. The middle image shows the liquid-liquid-gas equilibrium phase exhibiting two liquid phases at the bottom and in the middle sections as well as a gas phase at the top. The right side image shows the solid formation as the pressure is increased.

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“…Of particular concern was the accuracy of data for the higher molecular weight wax compounds. For liquid densities, data over a wide range of temperatures and pressures are available from Doolittle up to a carbon chain length of 40 [1]. Other density data are available for even higher molecular weight alkanes (up to C 94 ), but the measurements are limited to small temperature and pressure ranges.…”

Section: Task 1c Design and Construction Of New Apparatusmentioning

confidence: 99%