The Experts below are selected from a list of 234 Experts worldwide ranked by ideXlab platform
Andrea Capelli - One of the best experts on this subject based on the ideXlab platform.
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original Pycnometers for volatile liquid density over wide ranges of temperature and pressure practical example
Metrologia, 2014Co-Authors: Salvatore Lorefice, Raffaella Romeo, Marco Santiano, Andrea CapelliAbstract:A novel kind of Pycnometer was designed for liquid density measurements suitable to be used over wide ranges of temperature and pressure. Two similar Pycnometers have been manufactured and tested with n-nonane 99.7 mol% in the temperature range from 233 K to 313 K at pressure lower than 10 MPa. To validate the procedure, the experimental values of density of an n-nonane sample have been compared with the density values given in the literature by means of the En number. The density uncertainty of n-nonane is found to be 0.16 kg m−3 (0.02%) in the temperature range from 253 K to 313 K and lower than 0.07% between 233 K and 243 K over the whole pressure range tested.
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original Pycnometers for volatile liquid density over wide ranges of temperature and pressure practical example
Metrologia, 2014Co-Authors: Salvatore Lorefice, Raffaella Romeo, Marco Santiano, Andrea CapelliAbstract:A novel kind of Pycnometer was designed for liquid density measurements suitable to be used over wide ranges of temperature and pressure. Two similar Pycnometers have been manufactured and tested with n-nonane 99.7 mol% in the temperature range from 233 K to 313 K at pressure lower than 10 MPa. To validate the procedure, the experimental values of density of an n-nonane sample have been compared with the density values given in the literature by means of the En number. The density uncertainty of n-nonane is found to be 0.16 kg m−3 (0.02%) in the temperature range from 253 K to 313 K and lower than 0.07% between 233 K and 243 K over the whole pressure range tested.
Salvatore Lorefice - One of the best experts on this subject based on the ideXlab platform.
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original Pycnometers for volatile liquid density over wide ranges of temperature and pressure practical example
Metrologia, 2014Co-Authors: Salvatore Lorefice, Raffaella Romeo, Marco Santiano, Andrea CapelliAbstract:A novel kind of Pycnometer was designed for liquid density measurements suitable to be used over wide ranges of temperature and pressure. Two similar Pycnometers have been manufactured and tested with n-nonane 99.7 mol% in the temperature range from 233 K to 313 K at pressure lower than 10 MPa. To validate the procedure, the experimental values of density of an n-nonane sample have been compared with the density values given in the literature by means of the En number. The density uncertainty of n-nonane is found to be 0.16 kg m−3 (0.02%) in the temperature range from 253 K to 313 K and lower than 0.07% between 233 K and 243 K over the whole pressure range tested.
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original Pycnometers for volatile liquid density over wide ranges of temperature and pressure practical example
Metrologia, 2014Co-Authors: Salvatore Lorefice, Raffaella Romeo, Marco Santiano, Andrea CapelliAbstract:A novel kind of Pycnometer was designed for liquid density measurements suitable to be used over wide ranges of temperature and pressure. Two similar Pycnometers have been manufactured and tested with n-nonane 99.7 mol% in the temperature range from 233 K to 313 K at pressure lower than 10 MPa. To validate the procedure, the experimental values of density of an n-nonane sample have been compared with the density values given in the literature by means of the En number. The density uncertainty of n-nonane is found to be 0.16 kg m−3 (0.02%) in the temperature range from 253 K to 313 K and lower than 0.07% between 233 K and 243 K over the whole pressure range tested.
Raffaella Romeo - One of the best experts on this subject based on the ideXlab platform.
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original Pycnometers for volatile liquid density over wide ranges of temperature and pressure practical example
Metrologia, 2014Co-Authors: Salvatore Lorefice, Raffaella Romeo, Marco Santiano, Andrea CapelliAbstract:A novel kind of Pycnometer was designed for liquid density measurements suitable to be used over wide ranges of temperature and pressure. Two similar Pycnometers have been manufactured and tested with n-nonane 99.7 mol% in the temperature range from 233 K to 313 K at pressure lower than 10 MPa. To validate the procedure, the experimental values of density of an n-nonane sample have been compared with the density values given in the literature by means of the En number. The density uncertainty of n-nonane is found to be 0.16 kg m−3 (0.02%) in the temperature range from 253 K to 313 K and lower than 0.07% between 233 K and 243 K over the whole pressure range tested.
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original Pycnometers for volatile liquid density over wide ranges of temperature and pressure practical example
Metrologia, 2014Co-Authors: Salvatore Lorefice, Raffaella Romeo, Marco Santiano, Andrea CapelliAbstract:A novel kind of Pycnometer was designed for liquid density measurements suitable to be used over wide ranges of temperature and pressure. Two similar Pycnometers have been manufactured and tested with n-nonane 99.7 mol% in the temperature range from 233 K to 313 K at pressure lower than 10 MPa. To validate the procedure, the experimental values of density of an n-nonane sample have been compared with the density values given in the literature by means of the En number. The density uncertainty of n-nonane is found to be 0.16 kg m−3 (0.02%) in the temperature range from 253 K to 313 K and lower than 0.07% between 233 K and 243 K over the whole pressure range tested.
Marco Santiano - One of the best experts on this subject based on the ideXlab platform.
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original Pycnometers for volatile liquid density over wide ranges of temperature and pressure practical example
Metrologia, 2014Co-Authors: Salvatore Lorefice, Raffaella Romeo, Marco Santiano, Andrea CapelliAbstract:A novel kind of Pycnometer was designed for liquid density measurements suitable to be used over wide ranges of temperature and pressure. Two similar Pycnometers have been manufactured and tested with n-nonane 99.7 mol% in the temperature range from 233 K to 313 K at pressure lower than 10 MPa. To validate the procedure, the experimental values of density of an n-nonane sample have been compared with the density values given in the literature by means of the En number. The density uncertainty of n-nonane is found to be 0.16 kg m−3 (0.02%) in the temperature range from 253 K to 313 K and lower than 0.07% between 233 K and 243 K over the whole pressure range tested.
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original Pycnometers for volatile liquid density over wide ranges of temperature and pressure practical example
Metrologia, 2014Co-Authors: Salvatore Lorefice, Raffaella Romeo, Marco Santiano, Andrea CapelliAbstract:A novel kind of Pycnometer was designed for liquid density measurements suitable to be used over wide ranges of temperature and pressure. Two similar Pycnometers have been manufactured and tested with n-nonane 99.7 mol% in the temperature range from 233 K to 313 K at pressure lower than 10 MPa. To validate the procedure, the experimental values of density of an n-nonane sample have been compared with the density values given in the literature by means of the En number. The density uncertainty of n-nonane is found to be 0.16 kg m−3 (0.02%) in the temperature range from 253 K to 313 K and lower than 0.07% between 233 K and 243 K over the whole pressure range tested.
James C. Holste - One of the best experts on this subject based on the ideXlab platform.
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Experimental P−T−ρ and Enthalpy-Increment Measurements of an Equimolar Mixture of Trichlorofluoromethane (R-11) + Dichlorodifluoromethane (R-12)
Journal of Chemical & Engineering Data, 2003Co-Authors: Gustavo A. Iglesias-silva, R. C. Castro-gomez, James C. Holste, William J. Rogers, Kenneth R HallAbstract:We have measured experimental liquid densities and enthalpy increments for an equimolar mixture of trichlorofluoromethane (R-11) + dichlorodifluoromethane (R-12). We have used a continuously weighed Pycnometer for measuring the liquid densities and a thermoelectric flow calorimeter for measuring the enthalpy increments. The temperature range for all measurements is from (230 to 425) K. The experimental measurements range up to 69 MPa with the Pycnometer and 6.8 MPa with the calorimeter, respectively.
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Burnett and pycnometric (p,Vm,T) measurements for natural gas mixtures
The Journal of Chemical Thermodynamics, 1997Co-Authors: Chih-an Hwang, P.p. Simon, James C. Holste, Kenneth R Hall, K.n. MarshAbstract:Accurate (p,Vm,T) measurements were performed on five natural gas mixtures using a Burnett apparatus and a high pressure, continuously-weighed Pycnometer. These measurements were part of a co-operative project sponsored by the Gas Research Institute to establish an internally consistent database of experimental measurements for five representative natural gas mixtures. Burnett results are reported atT=(250, 275, 300, and 325) K for pressures to 11 MPa. Pycnometer results are reported atT=(225, 250, 275, 300, 325, and 350) K for pressures to 70 MPa.
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Densities of Carbon Dioxide + Methane Mixtures from 225 K to 350 K at Pressures up to 35 MPa
Journal of Chemical & Engineering Data, 1997Co-Authors: Chih-an Hwang, James C. Holste, Bruce E. Gammon, Gustavo A. Iglesias-silva, Kenneth R Hall, Kenneth N. MarshAbstract:This paper reports PVT measurements for five gravimetrically prepared CO2 + CH4 mixtures. A continuously-weighed, high-pressure Pycnometer was used to measure densities at temperatures from 225 K to 350 K in 25 K increments and pressures to 35 MPa with one set of measurements to 69 MPa. A detailed error analysis indicates that the accuracy of the densities is better than ±0.1%.
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A Continuously Weighed Pycnometer for Measuring Fluid Properties
Journal of Chemical & Engineering Data, 1997Co-Authors: Chih-an Hwang, H. B. Brugge, Horacio A. Duarte-garza, And K. R. Hall, James C. Holste, Bruce E. Gammon, Gustavo A. Iglesias-silva, William J. Rogers, K.n. MarshAbstract:This paper documents the construction details and experimental procedures for the continuously weighed Pycnometer used in our laboratory to measure fluid properties such as densities, saturation pressures, phase boundaries, and isothermal compressibilities. This apparatus consists of a cell suspended from an electronic balance at all times and a variable volume bellows cell which is used to adjust the confined sample density within an isothermal enclosure. The principal advantages of this apparatus are rapid measurement and relatively high accuracy. Some experimental results are presented to illustrate capability. The accessible experimental ranges are 100−450 K up to 200 MPa; measurement accuracy is 0.1% or better.
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PVT Properties and Bubble Point Pressures for Compositionally Characterized Commercial Grade Butane, 2-Methylpropane, and Natural Gasoline
Journal of Chemical & Engineering Data, 1996Co-Authors: Chih-an Hwang, James C. Holste, Bruce E. Gammon, Kenneth N. Marsh, Kenneth R Hall, William R. ParrishAbstract:The PVT properties and bubble point pressures for compositionally characterized commercial grade samples of butane, 2-methylpropane, and natural gasoline have been measured using a continuously weighed Pycnometer and a vibrating tube densimeter. The results cover the range of pressures from the bubble point to 9.7 MPa in the temperatures range from 255 K to 322 K. Experimental uncertainties are reported for the temperature, pressure, and density measurements. Measurements conducted at Texas A&M University and at Phillips Petroleum Co. agree within the estimated uncertainities of the two experimental methods.
