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A Nguyen - One of the best experts on this subject based on the ideXlab platform.
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vapor pressure heat capacity and density along the saturation line measurements for benzenamine butylbenzene sec butylbenzene tert butylbenzene 2 2 dimethylbutanoic acid tridecafluoroheptanoic acid 2 butyl 2 ethyl 1 3 propanediol 2 2 4 trimethyl 1 3
Journal of Chemical & Engineering Data, 2002Co-Authors: W V Steele, Robert D Chirico, And S E Knipmeyer, A NguyenAbstract:This paper reports measurements made within DIPPR2 Project 821 for the 1995 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point using a twin ebulliometric apparatus for the nine compounds listed in the title. Liquid-phase densities along the saturation line were measured for each compound over a range of temperatures (ambient to a maximum of 523 K). A differential scanning calorimeter was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. Where possible, the critical temperature and critical density for each compound were determined experimentally. The results of the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies of vaporization (restricted to within ±50 K of the temperature region of the experimentally determined v...
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measurements of vapor pressure heat capacity and density along the saturation line for cyclopropane carboxylic acid n n diethylethanolamine 2 3 dihydrofuran 5 hexen 2 one perfluorobutanoic acid and 2 phenylpropionaldehyde
Journal of Chemical & Engineering Data, 2002Co-Authors: W V Steele, Robert D Chirico, And S E Knipmeyer, A NguyenAbstract:This paper reports measurements made for DIPPR Research Project 821 in the 1997 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point for all six compounds using a twin ebulliometric apparatus. Liquid-phase densities along the saturation line were measured for each compound over a range of temperatures (ambient to a maximum of 448 K). A differential scanning calorimeter was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. The results of all the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies of vaporization [within the temperature range (±50 K) of the vapor pressures], solubility parameter, and heat capacities along the saturation line. Wagner-type vapor-pressure equations were derived for each compound. In addition,...
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vapor pressure heat capacity and density along the saturation line measurements for dimethyl isophthalate dimethyl carbonate 1 3 5 triethylbenzene pentafluorophenol 4 tert butylcatechol α methylstyrene and n n bis 2 hydroxyethyl ethylenediamine
Journal of Chemical & Engineering Data, 1997Co-Authors: W V Steele, Robert D Chirico, S E Knipmeyer, A NguyenAbstract:This paper reports measurements made for DIPPR Research Project 821 in the 1993 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point for all seven compounds using a twin ebulliometric system and, for dimethyl isophthalate and N,N‘-bis(2-hydroxyethyl)ethylenediamine, additionally an inclined-piston apparatus. Liquid-phase densities along the saturation line were measured for each compound over a range of temperature (ambient to a maximum of 548 K). A differential scanning calorimeter (DSC) was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. Where possible, the critical temperature and critical density for each compound were determined experimentally. The results of the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies...
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vapor pressure heat capacity and density along the saturation line measurements for cyclohexanol 2 cyclohexen 1 one 1 2 dichloropropane 1 4 di tert butylbenzene 2 ethylhexanoic acid 2 methylamino ethanol perfluoro n heptane and sulfolane
Journal of Chemical & Engineering Data, 1997Co-Authors: W V Steele, Robert D Chirico, And S E Knipmeyer, A NguyenAbstract:This paper reports measurements made for DIPPR Research Project 821 in the 1994 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point for eight compounds using a twin ebulliometric apparatus. Liquid-phase densities along the saturation line were measured for each compound over a range of temperatures (ambient to a maximum of 548 K). A differential scanning calorimeter (DSC) was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. Where possible, the critical temperature and critical density for each compound were determined experimentally. The results of the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies of vaporization [within the temperature range (±50 K) of the vapor pressures], enthalpies of fusion if solid at ambie...
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vapor pressure of acetophenone 1 2 butanediol 1 3 butanediol diethylene glycol monopropyl ether 1 3 dimethyladamantane 2 ethoxyethyl acetate ethyl octyl sulfide and pentyl acetate
Journal of Chemical & Engineering Data, 1996Co-Authors: W V Steele, Robert D Chirico, And S E Knipmeyer, A NguyenAbstract:This paper reports measurements made within the DIPPR‡ Project 821 for the 1992 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point for eight compounds using an inclined-piston and twin ebulliometric apparatus. Liquid-phase densities along the saturation line were measured for each compound over a range of temperature (ambient to a maximum of 548 K). A differential scanning calorimeter (dsc) was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. Where possible, the critical temperature and critical density for each compound were determined experimentally. The results of the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies of vaporization [restricted to within ±50 K of the temperature region of the experimentally deter...
W V Steele - One of the best experts on this subject based on the ideXlab platform.
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vapor pressure heat capacity and density along the saturation line measurements for benzenamine butylbenzene sec butylbenzene tert butylbenzene 2 2 dimethylbutanoic acid tridecafluoroheptanoic acid 2 butyl 2 ethyl 1 3 propanediol 2 2 4 trimethyl 1 3
Journal of Chemical & Engineering Data, 2002Co-Authors: W V Steele, Robert D Chirico, And S E Knipmeyer, A NguyenAbstract:This paper reports measurements made within DIPPR2 Project 821 for the 1995 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point using a twin ebulliometric apparatus for the nine compounds listed in the title. Liquid-phase densities along the saturation line were measured for each compound over a range of temperatures (ambient to a maximum of 523 K). A differential scanning calorimeter was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. Where possible, the critical temperature and critical density for each compound were determined experimentally. The results of the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies of vaporization (restricted to within ±50 K of the temperature region of the experimentally determined v...
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measurements of vapor pressure heat capacity and density along the saturation line for cyclopropane carboxylic acid n n diethylethanolamine 2 3 dihydrofuran 5 hexen 2 one perfluorobutanoic acid and 2 phenylpropionaldehyde
Journal of Chemical & Engineering Data, 2002Co-Authors: W V Steele, Robert D Chirico, And S E Knipmeyer, A NguyenAbstract:This paper reports measurements made for DIPPR Research Project 821 in the 1997 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point for all six compounds using a twin ebulliometric apparatus. Liquid-phase densities along the saturation line were measured for each compound over a range of temperatures (ambient to a maximum of 448 K). A differential scanning calorimeter was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. The results of all the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies of vaporization [within the temperature range (±50 K) of the vapor pressures], solubility parameter, and heat capacities along the saturation line. Wagner-type vapor-pressure equations were derived for each compound. In addition,...
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vapor pressure heat capacity and density along the saturation line measurements for dimethyl isophthalate dimethyl carbonate 1 3 5 triethylbenzene pentafluorophenol 4 tert butylcatechol α methylstyrene and n n bis 2 hydroxyethyl ethylenediamine
Journal of Chemical & Engineering Data, 1997Co-Authors: W V Steele, Robert D Chirico, S E Knipmeyer, A NguyenAbstract:This paper reports measurements made for DIPPR Research Project 821 in the 1993 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point for all seven compounds using a twin ebulliometric system and, for dimethyl isophthalate and N,N‘-bis(2-hydroxyethyl)ethylenediamine, additionally an inclined-piston apparatus. Liquid-phase densities along the saturation line were measured for each compound over a range of temperature (ambient to a maximum of 548 K). A differential scanning calorimeter (DSC) was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. Where possible, the critical temperature and critical density for each compound were determined experimentally. The results of the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies...
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vapor pressure heat capacity and density along the saturation line measurements for cyclohexanol 2 cyclohexen 1 one 1 2 dichloropropane 1 4 di tert butylbenzene 2 ethylhexanoic acid 2 methylamino ethanol perfluoro n heptane and sulfolane
Journal of Chemical & Engineering Data, 1997Co-Authors: W V Steele, Robert D Chirico, And S E Knipmeyer, A NguyenAbstract:This paper reports measurements made for DIPPR Research Project 821 in the 1994 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point for eight compounds using a twin ebulliometric apparatus. Liquid-phase densities along the saturation line were measured for each compound over a range of temperatures (ambient to a maximum of 548 K). A differential scanning calorimeter (DSC) was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. Where possible, the critical temperature and critical density for each compound were determined experimentally. The results of the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies of vaporization [within the temperature range (±50 K) of the vapor pressures], enthalpies of fusion if solid at ambie...
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vapor pressure of acetophenone 1 2 butanediol 1 3 butanediol diethylene glycol monopropyl ether 1 3 dimethyladamantane 2 ethoxyethyl acetate ethyl octyl sulfide and pentyl acetate
Journal of Chemical & Engineering Data, 1996Co-Authors: W V Steele, Robert D Chirico, And S E Knipmeyer, A NguyenAbstract:This paper reports measurements made within the DIPPR‡ Project 821 for the 1992 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point for eight compounds using an inclined-piston and twin ebulliometric apparatus. Liquid-phase densities along the saturation line were measured for each compound over a range of temperature (ambient to a maximum of 548 K). A differential scanning calorimeter (dsc) was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. Where possible, the critical temperature and critical density for each compound were determined experimentally. The results of the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies of vaporization [restricted to within ±50 K of the temperature region of the experimentally deter...
J A White - One of the best experts on this subject based on the ideXlab platform.
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extended corresponding states expressions for the changes in enthalpy compressibility Factor and constant volume heat capacity at vaporization
The Journal of Chemical Thermodynamics, 2015Co-Authors: S Velasco, M J Santos, J A WhiteAbstract:Abstract By analyzing data for the vapor pressure curve of 121 fluids considered by the National Institute of Standards and Technology (NIST) program RefProp 9.1, we find that the first and the second derivatives with respect to reduced temperature ( T r ) of the natural logarithm of the reduced vapor pressure at the Acentric point ( T r = 0.7 ) show a well defined behavior with the Acentric Factor ω . This fact is used for checking some well-known vapor pressure equations in the extended Pitzer corresponding states scheme. In this scheme, we then obtain analytical expressions for the temperature dependence of the enthalpy of vaporization and the changes in the compressibility Factor and the constant-volume heat capacity along the liquid–vapor coexistence curve. Comparisons with RefProp 9.1 results are presented for argon, propane and water. Furthermore, very good agreement is obtained when comparing with experimental data of perfluorobenzene and perfluoro-n-heptane.
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a corresponding states treatment of the liquid vapor saturation line
The Journal of Chemical Thermodynamics, 2012Co-Authors: S Velasco, Kandadai Srinivasan, Kim Choon Ng, J A WhiteAbstract:Abstract In this work we analyze correlations for the maxima of products of some liquid–vapor saturation properties. These points define new characteristic properties of each fluid that are shown to exhibit linear correlations with the critical properties. We also demonstrate that some of these properties are well correlated with the Acentric Factor. An application is made to predict the properties of two new low global warming potential (GWP) refrigerants.
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on srinivasan s criterion for the vapor pressure curve
Journal of Chemical & Engineering Data, 2010Co-Authors: S Velasco, F L Roman, J A WhiteAbstract:Srinivasan’s criterion states that, for all pure fluids, the saturation functions ϕ1 = (1 − Tr)Pr and ϕ1* = (1 − Pr)Tr (with Tr = T/Tc and Pr = P/Pc, Tc and Pc being the temperature and pressure at the critical point) in the vapor−liquid coexistence region present maxima at two different temperatures Tr1 and Tr1* within a small spread of values: Tr1 ≈ 0.85 to 0.9 and Tr1* ≈ 0.71 to 0.76. In this paper, we study this criterion for 51 fluids, including quantum fluids (3He, 4He, and H2) and normal alkanes CnH2n+2 with n ≤ 40. We find that Tr1 ≈ 0.77 to 0.93 and Tr1* ≈ 0.64 to 0.82. Correlations between the values of these maxima, (Tr1, ϕ1, max) and (Tr1*, ϕ1, max*), are derived depicting their mutual dependence. We also find that the values of the maxima can be accurately predicted in terms of the Pitzer Acentric Factor ω. These predictions are checked against additional data for 1214 fluids.
Santiago Velasco - One of the best experts on this subject based on the ideXlab platform.
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a simple semiempirical method for predicting the temperature entropy saturation curve of pure fluids
Industrial & Engineering Chemistry Research, 2019Co-Authors: Juan A. White, Santiago VelascoAbstract:In this work we propose an approximate analytical method to obtain the liquid–vapor saturation curve in a Tr–s* diagram, with Tr = T/Tc, s* = (s – sc)/R, Tc the critical temperature, s the molar entropy, sc the critical molar entropy, and R the gas constant, for a given fluid. The method uses a modified rectilinear diameter law for the saturated liquid and vapor entropies and an extended corresponding states equation for the entropy of vaporization. From this method, two approximations are derived. The first approximation requires the use of data obtained from RefProp or a similar program. The second approximation only needs Tc, the critical molar volume, vc, and the Acentric Factor, ω, of the fluid as input data. For most fluids, both approximations yield very good predictions.
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A Simple Semiempirical Method for Predicting the Temperature–Entropy Saturation Curve of Pure Fluids
Industrial & Engineering Chemistry Research, 2018Co-Authors: Juan A. White, Santiago VelascoAbstract:In this work we propose an approximate analytical method to obtain the liquid–vapor saturation curve in a Tr–s* diagram, with Tr = T/Tc, s* = (s – sc)/R, Tc the critical temperature, s the molar entropy, sc the critical molar entropy, and R the gas constant, for a given fluid. The method uses a modified rectilinear diameter law for the saturated liquid and vapor entropies and an extended corresponding states equation for the entropy of vaporization. From this method, two approximations are derived. The first approximation requires the use of data obtained from RefProp or a similar program. The second approximation only needs Tc, the critical molar volume, vc, and the Acentric Factor, ω, of the fluid as input data. For most fluids, both approximations yield very good predictions.
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Waring and Riedel Functions for the Liquid–Vapor Coexistence Curve
2012Co-Authors: Santiago Velasco, Juan A. White, Kandadai Srinivasan, Pradip DuttaAbstract:There exists a minimum in the Waring function, ψ(T) = −d(ln p)/d(1/T), and in the Riedel function, α(T) = d(ln p)/d(ln T), in the liquid–vapor coexistence curve for most fluids. By analyzing National Institute of Standards and Technology data for the molar enthalpy of vaporization and the compressibility variation at the liquid–vapor phase change of 105 fluids, we find that the temperatures of these minima are linearly correlated with the critical temperature, Tc. Using reduced coordinates, we also demonstrate that the minima are well-correlated with the Acentric Factor. These correlations are used for testing four well-known vapor pressure equations in the Pitzer corresponding states scheme
Robert D Chirico - One of the best experts on this subject based on the ideXlab platform.
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vapor pressure heat capacity and density along the saturation line measurements for benzenamine butylbenzene sec butylbenzene tert butylbenzene 2 2 dimethylbutanoic acid tridecafluoroheptanoic acid 2 butyl 2 ethyl 1 3 propanediol 2 2 4 trimethyl 1 3
Journal of Chemical & Engineering Data, 2002Co-Authors: W V Steele, Robert D Chirico, And S E Knipmeyer, A NguyenAbstract:This paper reports measurements made within DIPPR2 Project 821 for the 1995 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point using a twin ebulliometric apparatus for the nine compounds listed in the title. Liquid-phase densities along the saturation line were measured for each compound over a range of temperatures (ambient to a maximum of 523 K). A differential scanning calorimeter was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. Where possible, the critical temperature and critical density for each compound were determined experimentally. The results of the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies of vaporization (restricted to within ±50 K of the temperature region of the experimentally determined v...
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measurements of vapor pressure heat capacity and density along the saturation line for cyclopropane carboxylic acid n n diethylethanolamine 2 3 dihydrofuran 5 hexen 2 one perfluorobutanoic acid and 2 phenylpropionaldehyde
Journal of Chemical & Engineering Data, 2002Co-Authors: W V Steele, Robert D Chirico, And S E Knipmeyer, A NguyenAbstract:This paper reports measurements made for DIPPR Research Project 821 in the 1997 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point for all six compounds using a twin ebulliometric apparatus. Liquid-phase densities along the saturation line were measured for each compound over a range of temperatures (ambient to a maximum of 448 K). A differential scanning calorimeter was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. The results of all the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies of vaporization [within the temperature range (±50 K) of the vapor pressures], solubility parameter, and heat capacities along the saturation line. Wagner-type vapor-pressure equations were derived for each compound. In addition,...
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vapor pressure heat capacity and density along the saturation line measurements for dimethyl isophthalate dimethyl carbonate 1 3 5 triethylbenzene pentafluorophenol 4 tert butylcatechol α methylstyrene and n n bis 2 hydroxyethyl ethylenediamine
Journal of Chemical & Engineering Data, 1997Co-Authors: W V Steele, Robert D Chirico, S E Knipmeyer, A NguyenAbstract:This paper reports measurements made for DIPPR Research Project 821 in the 1993 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point for all seven compounds using a twin ebulliometric system and, for dimethyl isophthalate and N,N‘-bis(2-hydroxyethyl)ethylenediamine, additionally an inclined-piston apparatus. Liquid-phase densities along the saturation line were measured for each compound over a range of temperature (ambient to a maximum of 548 K). A differential scanning calorimeter (DSC) was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. Where possible, the critical temperature and critical density for each compound were determined experimentally. The results of the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies...
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vapor pressure heat capacity and density along the saturation line measurements for cyclohexanol 2 cyclohexen 1 one 1 2 dichloropropane 1 4 di tert butylbenzene 2 ethylhexanoic acid 2 methylamino ethanol perfluoro n heptane and sulfolane
Journal of Chemical & Engineering Data, 1997Co-Authors: W V Steele, Robert D Chirico, And S E Knipmeyer, A NguyenAbstract:This paper reports measurements made for DIPPR Research Project 821 in the 1994 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point for eight compounds using a twin ebulliometric apparatus. Liquid-phase densities along the saturation line were measured for each compound over a range of temperatures (ambient to a maximum of 548 K). A differential scanning calorimeter (DSC) was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. Where possible, the critical temperature and critical density for each compound were determined experimentally. The results of the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies of vaporization [within the temperature range (±50 K) of the vapor pressures], enthalpies of fusion if solid at ambie...
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vapor pressure of acetophenone 1 2 butanediol 1 3 butanediol diethylene glycol monopropyl ether 1 3 dimethyladamantane 2 ethoxyethyl acetate ethyl octyl sulfide and pentyl acetate
Journal of Chemical & Engineering Data, 1996Co-Authors: W V Steele, Robert D Chirico, And S E Knipmeyer, A NguyenAbstract:This paper reports measurements made within the DIPPR‡ Project 821 for the 1992 Project Year. Vapor pressures were measured to a pressure limit of 270 kPa or lower decomposition point for eight compounds using an inclined-piston and twin ebulliometric apparatus. Liquid-phase densities along the saturation line were measured for each compound over a range of temperature (ambient to a maximum of 548 K). A differential scanning calorimeter (dsc) was used to measure two-phase (liquid + vapor) heat capacities for each compound in the temperature region ambient to the critical temperature or lower decomposition point. Where possible, the critical temperature and critical density for each compound were determined experimentally. The results of the measurements were combined to derive a series of thermophysical properties including critical temperature, critical density, critical pressure, Acentric Factor, enthalpies of vaporization [restricted to within ±50 K of the temperature region of the experimentally deter...
