Solubility of non-polar gases in cyclohexanone between 273.15 and 303.15 K at 101.32 kPa partial pressure of gas

1987 ◽  
Vol 65 (9) ◽  
pp. 2198-2202 ◽  
Author(s):  
María Asunción Gallardo ◽  
José María Melendo ◽  
José Santiago Urieta ◽  
Celso Gutierrez Losa
Keyword(s):  
Gibbs Energy ◽  
Partial Pressure ◽  
Temperature Dependence ◽  
Hard Sphere ◽  
Scaled Particle Theory ◽  
Sphere Diameter ◽  
Particle Theory ◽  
Enthalpy And Entropy

Solubility measurements of several non-polar gases (He, Ne, Ar, Kr, Xe, H2, D2, N2, O2, C2H4, C2H6, CF4, SF6, andCO2) in cyclohexanone at 273.15 to 303.15 K and a partial pressure of gas of 101.32 kPa, are reported. Gibbs energy, enthalpy, and entropy of solution at 298.15 K and 101.32 kPa partial pressure of gas were evaluated. Effective hard-sphere diameter temperature dependence has been studied and its effect on the calculated SPT (Scaled Particle Theory) solubilities, and enthalpies and entropies of solution was also examined.

Scaled particle theory of gas solubility — inclusion of the temperature dependent hard sphere term

1982 ◽  
Vol 60 (14) ◽  
pp. 1896-1900 ◽  
Author(s):  
Bruce A. Cosgrove ◽  
John Walkley
Keyword(s):  
Temperature Dependence ◽  
Hard Sphere ◽  
Inert Gases ◽  
Scaled Particle Theory ◽  
Sphere Diameter ◽  
Gas Solubility ◽  
Particle Theory ◽  
Temperature Dependent ◽  
Limiting Behaviour ◽  
Self Consistency

The limiting behaviour of the scaled particle theory (spt) of gas solubility has been examined for the inert gases in a range of solvents. The hard sphere limit is shown to exhibit thermodynamic self-consistency only with the inclusion of an effective hard sphere diameter temperature dependence whereas the original spt (exclusion of a temperature dependence) fails to extrapolate to the correct hard sphere limit. Furthermore, inclusion of the temperature dependence yields correct thermodynamic properties for gases of small atomic diameter (and well depth potential) as would be expected from a hard sphere based theory.

Solubility of nonpolar gases in 2-methylcyclohexanone between 273.15 and 303.15 K at 101.32 kPa partial pressure of gas

1989 ◽  
Vol 67 (5) ◽  
pp. 809-811 ◽  
Author(s):  
Maria Asuncion Gallardo ◽  
Maria del Carmen Lopez ◽  
Jose Santiago Urieta ◽  
Celso Gutierrez Losa
Keyword(s):  
Partial Pressure ◽  
Thermodynamic Functions ◽  
Solution Process ◽  
Pair Potential ◽  
Scaled Particle Theory ◽  
Sphere Diameter ◽  
Gas Solubility ◽  
Particle Theory ◽  
Potential Parameters ◽  
Solubility Of Nonpolar Gases

Solubility measurements of several nonpolar gases (He, Ne, Ar, Kr, Xe, H2, D2, N2, CH4, C2H4, C2H6, CF4, SF6, and CO2) in 2-methylcyclohexanone at 273.15–303.15 K and a partial pressure of gas of 101.32 kPa are reported. Thermodynamic functions (Gibbs energy, enthalpy, and entropy) for the solution process at 298.15 K and 101.32 kPa partial pressure of gas are evaluated. Use is made of the Scaled Particle Theory applied to gas solubility for determining Lennard-Jones (6, 12) pair-potential parameters and temperature dependence of the effective hard-sphere diameter of the solvent. The values that this theory predicts for the solution thermodynamic functions are also calculated. Keywords: 2-methylcyclohexanone, gas solubility, thermodynamic functions of solution, Henry coefficient, scaled particle theory.

Solubility of nonpolar gases in 2,2,2-trifluoroethanol and 1,1,1,3,3,3-hexafluoropropan-2-ol at several temperatures and 101.33 kPa partial pressure of gas

2001 ◽  
Vol 79 (10) ◽  
pp. 1460-1465 ◽  
Author(s):  
Miguel Angel Sánchez ◽  
Ana María Mainar ◽  
Juan Ignacio Pardo ◽  
María Carmen López ◽  
José Santiago Urieta
Keyword(s):  
Partial Pressure ◽  
Thermodynamic Functions ◽  
Partial Molar Volumes ◽  
Scaled Particle Theory ◽  
Particle Theory ◽  
Molar Volumes ◽  
Gas Solubilities ◽  
Enthalpy And Entropy ◽  
Solubility Of Nonpolar Gases

Solubilities, expressed as mol fractions, of 14 nonpolar gases (He, Ne, Ar, Kr, Xe, H2, N2, O2, CH4, C2H4, C2H6, CO2, CF4, and SF6) in 2,2,2-trifluoroethanol (TFE) at 268.15 and 283.15 K and 1,1,1,3,3,3-hexafluoropropan-2-ol (HFIP) at 273.15 and 283.15 K, with the partial pressure of gas being 101.33 kPa for all measurements, are reported. Standard changes in the thermodynamic functions (enthalpy and entropy) have been calculated from the solubilities and their variation with temperature. The Scaled Particle Theory (SPT) model has been used to determine these thermodynamic functions and also the partial molar volumes of the gases in the formed solutions.Key words: gas solubilities, nonpolar gases, fluoroalcohols, Scaled Particle Theory.

Solubility of nonpolar gases in 2,6-dimethylcyclohexanone

1990 ◽  
Vol 68 (3) ◽  
pp. 435-439 ◽  
Author(s):  
Maria Asuncion Gallardo ◽  
Maria Del Carmen Lopez ◽  
Jose Santiago Urieta ◽  
Celso Gutierrez Losa
Keyword(s):  
Gibbs Energy ◽  
Thermodynamic Functions ◽  
Pair Potential ◽  
Scaled Particle Theory ◽  
Gas Solubility ◽  
Particle Theory ◽  
Lennard Jones ◽  
Enthalpy And Entropy ◽  
Potential Parameters ◽  
Solubility Of Nonpolar Gases

Solubility measurements of He, Ne, Ar, Kr, Xe, H2, D2, N2, CH4, C2H4, C2H6, CF4, SF6, and CO2 in 2,6-dimethylcyclohexanone at temperatures 273.15 to 303.15 K and at a gas partial pressure of 101.33 kPa are reported. Standard changes in Gibbs energy, enthalpy, and entropy for the dissolution process at 298.15 K are also presented. Results for both solubility and thermodynamic functions are compared with those for cyclohexanone and 2-methylcyclohexanone. The scaled particle theory is used to obtain the effective Lennard–Jones (6,12) pair potential parameters for 2,6-dimethylcyclohexanone and, from these, the values it predicts for the solubility of the studied gases in the solvent are obtained. Keywords: gas solubility, Henry coefficient, 2,6-dimethylcyclohexanone, thermodynamic functions of solution, non-polar gases.

scholarly journals Temperature dependence of the specific heat and thermodynamic functions AК1М2 alloy, doped strontium

2019 ◽  
Vol 21 (1) ◽  
pp. 35-42 ◽  
Author(s):  
I. N. Ganiev ◽  
S. E. Otajonov ◽  
N. F. Ibrohimov ◽  
M. Mahmudov
Keyword(s):  
Heat Capacity ◽  
Gibbs Energy ◽  
Specific Heat ◽  
Temperature Dependence ◽  
Specific Heat Capacity ◽  
Thermodynamic Functions ◽  
Inverse Relationship ◽  
Alloying Element ◽  
Enthalpy And Entropy ◽  
Increasing Temperature

In the heat «cooling» investigated the temperature dependence of the specific heat capacity and thermodynamic functions doped strontium alloy AK1М2 in the range 298,15—900 K. Mathematical models are obtained that describe the change in these properties of alloys in the temperature range 298.15—900 K, as well as on the concentration of the doping component. It was found that with increasing temperature, specific heat capacity, enthalpy and entropy alloys increase, and the concentration up to 0.5 wt.% of the alloying element decreases. Gibbs energy values have an inverse relationship, i.e., temperature — decreases the content of alloying component — is up to 0.5 wt.% growing.

scholarly journals Scaled particle theory for hard sphere pairs. II. Numerical analysis

2006 ◽  
Vol 125 (20) ◽  
pp. 204505 ◽  
Author(s):  
Swaroop Chatterjee ◽  
Pablo G. Debenedetti ◽  
Frank H. Stillinger
Keyword(s):  
Numerical Analysis ◽  
Hard Sphere ◽  
Scaled Particle Theory ◽  
Particle Theory

Thermodynamics of transfer of Ph4C; scaled-particle theory and the Ph4As+/Ph4B− assumption for single ions

1979 ◽  
Vol 57 (15) ◽  
pp. 2004-2009 ◽  
Author(s):  
Michael H. Abraham ◽  
Asadollah Nasehzadeh
Keyword(s):  
Free Energy ◽  
Total Free Energy ◽  
Scaled Particle Theory ◽  
Free Energies ◽  
Particle Theory ◽  
Free Energy Of Transfer ◽  
Enthalpy And Entropy ◽  
Interaction Term ◽  
Energy Of Transfer ◽  
Entropy Of Transfer

Free energies of transfer of Ph4C from acetonitrile to 20 other solvents have been calculated from literature data. The contribution of the cavity term to the total free energy has been obtained from scaled-particle theory and Sinanoglu–Reisse–Moura Ramos theory. It is shown that there is little connection between the cavity term and the total free energy of transfer, and that there must be, in general, a large interaction term. If the latter is important for transfer of Ph4C, we argue that it must also be important for transfer of the ions Ph4As+ and Ph4B−. Previous suggestions that the interaction term is zero for transfer of these two ions are thus seen to be unreasonable. We also show, for six solvents, that the interaction term for Ph4C is very large in terms of enthalpy and entropy, and that scaled-particle theory seems not to apply to transfers of Ph4C between pure organic solvents.The free energy, enthalpy, and entropy of transfer of Ph4As+ = Ph4B− have been calculated by dividing the total transfer values into neutral and electrostatic contributions; reasonable agreement is obtained between calculated and observed values.

Fluids in random porous media: Scaled particle theory

2012 ◽  
Vol 85 (1) ◽  
pp. 115-133 ◽  
Author(s):  
Myroslav Holovko ◽  
Taras Patsahan ◽  
Wei Dong
Keyword(s):  
Porous Media ◽  
Thermodynamic Properties ◽  
Hard Sphere ◽  
Chemical Potential ◽  
Critical Density ◽  
Critical Parameters ◽  
Scaled Particle Theory ◽  
Particle Theory ◽  
Confined Fluid ◽  
Random Porous Media

The scaled particle theory (SPT) is applied to describe thermodynamic properties of a hard sphere (HS) fluid in random porous media. To this purpose, we extended the SPT2 approach, which has been developed previously. The analytical expressions for the chemical potential of an HS fluid in HS and overlapping hard sphere (OPH) matrices, sponge matrix, and hard convex body (HCB) matrix are obtained and analyzed. A series of new approximations for SPT2 are proposed. The grand canonical Monte Carlo (GGMC) simulations are performed to verify an accuracy of the SPT2 approach combined with the new approximations. A possibility of mapping between thermodynamic properties of an HS fluid in random porous media of different types is discussed. It is shown that thermodynamic properties of a fluid in the different matrices tend to be equal if the probe particle porosities and the specific surface pore areas of considered matrices are identical. The obtained results for an HS fluid in random porous media as reference systems are used to extend the van der Waals equation of state to the case of a simple fluid in random porous media. It is observed that a decrease of matrix porosity leads to lowering of the critical temperature and the critical density of a confined fluid, while an increase of a size of matrix particles causes an increase of these critical parameters.

Scaled Particle Theory for Multicomponent Hard Sphere Fluids Confined in Random Porous Media

2016 ◽  
Vol 120 (24) ◽  
pp. 5491-5504 ◽  
Author(s):  
W. Chen ◽  
S. L. Zhao ◽  
M. Holovko ◽  
X. S. Chen ◽  
W. Dong
Keyword(s):  
Porous Media ◽  
Hard Sphere ◽  
Scaled Particle Theory ◽  
Particle Theory ◽  
Random Porous Media
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