The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform
Deresh Ramjugernath - One of the best experts on this subject based on the ideXlab platform.
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Effect of temperature on density, sound velocity, refractive index and their derived properties for the binary systems (Heptanoic Acid + propanoic or butanoic Acids)
The Journal of Chemical Thermodynamics, 2014Co-Authors: Indra Bahadur, Deresh Ramjugernath, Paramespri Naidoo, Sangeeta Singh, Nirmala DeenadayaluAbstract:Abstract In this work, the effect of temperature on density ( ρ ), sound velocity ( u ), refractive index ( n ) and their derived properties for carboxylic Acid mixtures was studied. The thermophysical properties: density, sound velocity and refractive index were measured over the entire composition range at T = (293.15, 298.15, 303.15, 308.15 and 313.15) K and at p = 0.1 MPa for the binary systems (Heptanoic Acid + propanoic or butanoic Acids). The mass fraction of water was found to be unusually large and could not be reduced further. The Lorentz–Lorenz approximation was used to predict the density from refractive index or the refractive index from density of the binary mixtures. Sound velocity mixing rules were applied to the experimental sound velocity data. Excess molar volumes, V m E , isentropic compressibilities, κ s , excess isentropic compressibilities, κ s E , and deviation in refractive indices, Δ n , were also calculated from the experimental data. The Redlich–Kister polynomial equation was fitted to the excess properties and the deviation in refractive index data. Thermophysical properties are useful in understanding the intermolecular interactions between the components of mixtures.
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solid liquid equilibria measurements for binary systems comprising butyric Acid propionic or pentanoic Acid and Heptanoic Acid propionic or butyric or pentanoic or hexanoic Acid
The Journal of Chemical Thermodynamics, 2013Co-Authors: Margreth Tadie, Indra Bahadur, Prashant Reddy, Peterson Thokozani Ngema, Paramespri Naidoo, Nirmala Deenadayalu, Deresh RamjugernathAbstract:Abstract Solid–liquid equilibria (SLE) measurements have been undertaken for carboxylic Acid systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid) via a synthetic method using two complementary pieces of equipment. The measurements have been obtained at atmospheric pressure and over the temperature range of (225.6 to 270.7) K. All the Acid mixtures exhibit a eutectic point in their respective phase diagrams, which have been determined experimentally. The estimated maximum uncertainties in the reported temperatures and compositions are ±1 K and ±0.0006 mole fraction, respectively. The experimental data have been satisfactorily correlated with the Wilson and NRTL activity coefficient models.
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Solid–liquid equilibria measurements for binary systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid)
The Journal of Chemical Thermodynamics, 2013Co-Authors: Margreth Tadie, Indra Bahadur, Prashant Reddy, Peterson Thokozani Ngema, Paramespri Naidoo, Nirmala Deenadayalu, Deresh RamjugernathAbstract:Abstract Solid–liquid equilibria (SLE) measurements have been undertaken for carboxylic Acid systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid) via a synthetic method using two complementary pieces of equipment. The measurements have been obtained at atmospheric pressure and over the temperature range of (225.6 to 270.7) K. All the Acid mixtures exhibit a eutectic point in their respective phase diagrams, which have been determined experimentally. The estimated maximum uncertainties in the reported temperatures and compositions are ±1 K and ±0.0006 mole fraction, respectively. The experimental data have been satisfactorily correlated with the Wilson and NRTL activity coefficient models.
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Ternary Liquid−Liquid Equilibria of Acetonitrile and Water with Heptanoic Acid and Nonanol at 323.15 K and 1 atm
Journal of Chemical & Engineering Data, 2009Co-Authors: Caleb Narasigadu, Johan David Raal, P. Naidoo, Deresh RamjugernathAbstract:Liquid−liquid equilibrium data were measured and correlated for the ternary systems acetonitrile + water + Heptanoic Acid and acetonitrile + water + nonanol at 323.15 K and 1 atm. The liquid−liquid equilibrium data were measured using the direct analytical method in a double-walled glass cell. The binodal curve was correlated using a modified Hlavatý equation, a β function, and a log γ equation. The experimental tie lines were correlated using the NRTL and UNIQUAC activity coefficient models. Fitting of both activity coefficient models was undertaken by nonlinear least-squares regression of the data. The tie-line data were used to derive the selectivity values for solvent separation efficiency.
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ternary liquid liquid equilibria of acetonitrile and water with Heptanoic Acid and nonanol at 323 15 k and 1 atm
Journal of Chemical & Engineering Data, 2009Co-Authors: Caleb Narasigadu, Johan David Raal, P. Naidoo, Deresh RamjugernathAbstract:Liquid−liquid equilibrium data were measured and correlated for the ternary systems acetonitrile + water + Heptanoic Acid and acetonitrile + water + nonanol at 323.15 K and 1 atm. The liquid−liquid equilibrium data were measured using the direct analytical method in a double-walled glass cell. The binodal curve was correlated using a modified Hlavatý equation, a β function, and a log γ equation. The experimental tie lines were correlated using the NRTL and UNIQUAC activity coefficient models. Fitting of both activity coefficient models was undertaken by nonlinear least-squares regression of the data. The tie-line data were used to derive the selectivity values for solvent separation efficiency.
Nirmala Deenadayalu - One of the best experts on this subject based on the ideXlab platform.
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Effect of temperature on density, sound velocity, refractive index and their derived properties for the binary systems (Heptanoic Acid + propanoic or butanoic Acids)
The Journal of Chemical Thermodynamics, 2014Co-Authors: Indra Bahadur, Deresh Ramjugernath, Paramespri Naidoo, Sangeeta Singh, Nirmala DeenadayaluAbstract:Abstract In this work, the effect of temperature on density ( ρ ), sound velocity ( u ), refractive index ( n ) and their derived properties for carboxylic Acid mixtures was studied. The thermophysical properties: density, sound velocity and refractive index were measured over the entire composition range at T = (293.15, 298.15, 303.15, 308.15 and 313.15) K and at p = 0.1 MPa for the binary systems (Heptanoic Acid + propanoic or butanoic Acids). The mass fraction of water was found to be unusually large and could not be reduced further. The Lorentz–Lorenz approximation was used to predict the density from refractive index or the refractive index from density of the binary mixtures. Sound velocity mixing rules were applied to the experimental sound velocity data. Excess molar volumes, V m E , isentropic compressibilities, κ s , excess isentropic compressibilities, κ s E , and deviation in refractive indices, Δ n , were also calculated from the experimental data. The Redlich–Kister polynomial equation was fitted to the excess properties and the deviation in refractive index data. Thermophysical properties are useful in understanding the intermolecular interactions between the components of mixtures.
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solid liquid equilibria measurements for binary systems comprising butyric Acid propionic or pentanoic Acid and Heptanoic Acid propionic or butyric or pentanoic or hexanoic Acid
The Journal of Chemical Thermodynamics, 2013Co-Authors: Margreth Tadie, Indra Bahadur, Prashant Reddy, Peterson Thokozani Ngema, Paramespri Naidoo, Nirmala Deenadayalu, Deresh RamjugernathAbstract:Abstract Solid–liquid equilibria (SLE) measurements have been undertaken for carboxylic Acid systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid) via a synthetic method using two complementary pieces of equipment. The measurements have been obtained at atmospheric pressure and over the temperature range of (225.6 to 270.7) K. All the Acid mixtures exhibit a eutectic point in their respective phase diagrams, which have been determined experimentally. The estimated maximum uncertainties in the reported temperatures and compositions are ±1 K and ±0.0006 mole fraction, respectively. The experimental data have been satisfactorily correlated with the Wilson and NRTL activity coefficient models.
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Solid–liquid equilibria measurements for binary systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid)
The Journal of Chemical Thermodynamics, 2013Co-Authors: Margreth Tadie, Indra Bahadur, Prashant Reddy, Peterson Thokozani Ngema, Paramespri Naidoo, Nirmala Deenadayalu, Deresh RamjugernathAbstract:Abstract Solid–liquid equilibria (SLE) measurements have been undertaken for carboxylic Acid systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid) via a synthetic method using two complementary pieces of equipment. The measurements have been obtained at atmospheric pressure and over the temperature range of (225.6 to 270.7) K. All the Acid mixtures exhibit a eutectic point in their respective phase diagrams, which have been determined experimentally. The estimated maximum uncertainties in the reported temperatures and compositions are ±1 K and ±0.0006 mole fraction, respectively. The experimental data have been satisfactorily correlated with the Wilson and NRTL activity coefficient models.
Indra Bahadur - One of the best experts on this subject based on the ideXlab platform.
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Effect of temperature on density, sound velocity, refractive index and their derived properties for the binary systems (Heptanoic Acid + propanoic or butanoic Acids)
The Journal of Chemical Thermodynamics, 2014Co-Authors: Indra Bahadur, Deresh Ramjugernath, Paramespri Naidoo, Sangeeta Singh, Nirmala DeenadayaluAbstract:Abstract In this work, the effect of temperature on density ( ρ ), sound velocity ( u ), refractive index ( n ) and their derived properties for carboxylic Acid mixtures was studied. The thermophysical properties: density, sound velocity and refractive index were measured over the entire composition range at T = (293.15, 298.15, 303.15, 308.15 and 313.15) K and at p = 0.1 MPa for the binary systems (Heptanoic Acid + propanoic or butanoic Acids). The mass fraction of water was found to be unusually large and could not be reduced further. The Lorentz–Lorenz approximation was used to predict the density from refractive index or the refractive index from density of the binary mixtures. Sound velocity mixing rules were applied to the experimental sound velocity data. Excess molar volumes, V m E , isentropic compressibilities, κ s , excess isentropic compressibilities, κ s E , and deviation in refractive indices, Δ n , were also calculated from the experimental data. The Redlich–Kister polynomial equation was fitted to the excess properties and the deviation in refractive index data. Thermophysical properties are useful in understanding the intermolecular interactions between the components of mixtures.
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solid liquid equilibria measurements for binary systems comprising butyric Acid propionic or pentanoic Acid and Heptanoic Acid propionic or butyric or pentanoic or hexanoic Acid
The Journal of Chemical Thermodynamics, 2013Co-Authors: Margreth Tadie, Indra Bahadur, Prashant Reddy, Peterson Thokozani Ngema, Paramespri Naidoo, Nirmala Deenadayalu, Deresh RamjugernathAbstract:Abstract Solid–liquid equilibria (SLE) measurements have been undertaken for carboxylic Acid systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid) via a synthetic method using two complementary pieces of equipment. The measurements have been obtained at atmospheric pressure and over the temperature range of (225.6 to 270.7) K. All the Acid mixtures exhibit a eutectic point in their respective phase diagrams, which have been determined experimentally. The estimated maximum uncertainties in the reported temperatures and compositions are ±1 K and ±0.0006 mole fraction, respectively. The experimental data have been satisfactorily correlated with the Wilson and NRTL activity coefficient models.
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Solid–liquid equilibria measurements for binary systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid)
The Journal of Chemical Thermodynamics, 2013Co-Authors: Margreth Tadie, Indra Bahadur, Prashant Reddy, Peterson Thokozani Ngema, Paramespri Naidoo, Nirmala Deenadayalu, Deresh RamjugernathAbstract:Abstract Solid–liquid equilibria (SLE) measurements have been undertaken for carboxylic Acid systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid) via a synthetic method using two complementary pieces of equipment. The measurements have been obtained at atmospheric pressure and over the temperature range of (225.6 to 270.7) K. All the Acid mixtures exhibit a eutectic point in their respective phase diagrams, which have been determined experimentally. The estimated maximum uncertainties in the reported temperatures and compositions are ±1 K and ±0.0006 mole fraction, respectively. The experimental data have been satisfactorily correlated with the Wilson and NRTL activity coefficient models.
Paramespri Naidoo - One of the best experts on this subject based on the ideXlab platform.
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Effect of temperature on density, sound velocity, refractive index and their derived properties for the binary systems (Heptanoic Acid + propanoic or butanoic Acids)
The Journal of Chemical Thermodynamics, 2014Co-Authors: Indra Bahadur, Deresh Ramjugernath, Paramespri Naidoo, Sangeeta Singh, Nirmala DeenadayaluAbstract:Abstract In this work, the effect of temperature on density ( ρ ), sound velocity ( u ), refractive index ( n ) and their derived properties for carboxylic Acid mixtures was studied. The thermophysical properties: density, sound velocity and refractive index were measured over the entire composition range at T = (293.15, 298.15, 303.15, 308.15 and 313.15) K and at p = 0.1 MPa for the binary systems (Heptanoic Acid + propanoic or butanoic Acids). The mass fraction of water was found to be unusually large and could not be reduced further. The Lorentz–Lorenz approximation was used to predict the density from refractive index or the refractive index from density of the binary mixtures. Sound velocity mixing rules were applied to the experimental sound velocity data. Excess molar volumes, V m E , isentropic compressibilities, κ s , excess isentropic compressibilities, κ s E , and deviation in refractive indices, Δ n , were also calculated from the experimental data. The Redlich–Kister polynomial equation was fitted to the excess properties and the deviation in refractive index data. Thermophysical properties are useful in understanding the intermolecular interactions between the components of mixtures.
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solid liquid equilibria measurements for binary systems comprising butyric Acid propionic or pentanoic Acid and Heptanoic Acid propionic or butyric or pentanoic or hexanoic Acid
The Journal of Chemical Thermodynamics, 2013Co-Authors: Margreth Tadie, Indra Bahadur, Prashant Reddy, Peterson Thokozani Ngema, Paramespri Naidoo, Nirmala Deenadayalu, Deresh RamjugernathAbstract:Abstract Solid–liquid equilibria (SLE) measurements have been undertaken for carboxylic Acid systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid) via a synthetic method using two complementary pieces of equipment. The measurements have been obtained at atmospheric pressure and over the temperature range of (225.6 to 270.7) K. All the Acid mixtures exhibit a eutectic point in their respective phase diagrams, which have been determined experimentally. The estimated maximum uncertainties in the reported temperatures and compositions are ±1 K and ±0.0006 mole fraction, respectively. The experimental data have been satisfactorily correlated with the Wilson and NRTL activity coefficient models.
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Solid–liquid equilibria measurements for binary systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid)
The Journal of Chemical Thermodynamics, 2013Co-Authors: Margreth Tadie, Indra Bahadur, Prashant Reddy, Peterson Thokozani Ngema, Paramespri Naidoo, Nirmala Deenadayalu, Deresh RamjugernathAbstract:Abstract Solid–liquid equilibria (SLE) measurements have been undertaken for carboxylic Acid systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid) via a synthetic method using two complementary pieces of equipment. The measurements have been obtained at atmospheric pressure and over the temperature range of (225.6 to 270.7) K. All the Acid mixtures exhibit a eutectic point in their respective phase diagrams, which have been determined experimentally. The estimated maximum uncertainties in the reported temperatures and compositions are ±1 K and ±0.0006 mole fraction, respectively. The experimental data have been satisfactorily correlated with the Wilson and NRTL activity coefficient models.
Margreth Tadie - One of the best experts on this subject based on the ideXlab platform.
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solid liquid equilibria measurements for binary systems comprising butyric Acid propionic or pentanoic Acid and Heptanoic Acid propionic or butyric or pentanoic or hexanoic Acid
The Journal of Chemical Thermodynamics, 2013Co-Authors: Margreth Tadie, Indra Bahadur, Prashant Reddy, Peterson Thokozani Ngema, Paramespri Naidoo, Nirmala Deenadayalu, Deresh RamjugernathAbstract:Abstract Solid–liquid equilibria (SLE) measurements have been undertaken for carboxylic Acid systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid) via a synthetic method using two complementary pieces of equipment. The measurements have been obtained at atmospheric pressure and over the temperature range of (225.6 to 270.7) K. All the Acid mixtures exhibit a eutectic point in their respective phase diagrams, which have been determined experimentally. The estimated maximum uncertainties in the reported temperatures and compositions are ±1 K and ±0.0006 mole fraction, respectively. The experimental data have been satisfactorily correlated with the Wilson and NRTL activity coefficient models.
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Solid–liquid equilibria measurements for binary systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid)
The Journal of Chemical Thermodynamics, 2013Co-Authors: Margreth Tadie, Indra Bahadur, Prashant Reddy, Peterson Thokozani Ngema, Paramespri Naidoo, Nirmala Deenadayalu, Deresh RamjugernathAbstract:Abstract Solid–liquid equilibria (SLE) measurements have been undertaken for carboxylic Acid systems comprising (butyric Acid + propionic or pentanoic Acid) and (Heptanoic Acid + propionic or butyric or pentanoic or hexanoic Acid) via a synthetic method using two complementary pieces of equipment. The measurements have been obtained at atmospheric pressure and over the temperature range of (225.6 to 270.7) K. All the Acid mixtures exhibit a eutectic point in their respective phase diagrams, which have been determined experimentally. The estimated maximum uncertainties in the reported temperatures and compositions are ±1 K and ±0.0006 mole fraction, respectively. The experimental data have been satisfactorily correlated with the Wilson and NRTL activity coefficient models.