The relationship between vapour pressure, vaporization enthalpy, and enthalpy of transfer from solution to gas: An extension of the Martin equation

Srisaipet, Anakahaorn; Aryusuk, Kornkanok; Lilitchan, Supathra; Krisnangkura, Kanit

doi:10.1016/j.jct.2006.12.014

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…However, the transformation of a solute in solution to gas involves two physical phenomena. The interaction between the solute and the column stationary phase is measured by free energy of solution, (Δ s G f ), and the vaporization of the solute is measured by free energy of vaporization, Δ g l G o , [28,29]. Therefore, the increment in Δ The anomaly of the C1 series was observed on other phenomenon, such as gas holdup time [30,31].…”

Section: Resultsmentioning

confidence: 99%

Free Energy Contribution to Gas Chromatographic Separation of Petroselinate and Oleate Esters

Sansa-ard

Aryusuk

Lilitchan

et al. 2011

Chromatography Research International

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The ease of separation by gas chromatography between petroselinic and oleic acids depends on the alcohol moieties of their esters. The esters of higher molecular weight alcohols tend to be better separated on a 90%-biscyanopropyl-10%-cyanopropylphenyl polysiloxane capillary column (30 m × 0.25 mm i.d.). By analysis of free energies contribution from different parts of the molecules, it is tentatively concluded that the interaction between the double bond and the column stationary phase is interfered by the bulky alkyl group, and it is the major driving force for the separation of the two fatty acids.

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Section: Resultsmentioning

confidence: 99%

Free Energy Contribution to Gas Chromatographic Separation of Petroselinate and Oleate Esters

Sansa-ard

Aryusuk

Lilitchan

et al. 2011

Chromatography Research International

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“…The Martin’s rule of free energy additivity has been successfully extended to other physical phenomena, gas chromatographic peak width, vapor pressure of a pure liquid, viscosity, and surface tension of FAME and biodiesel. − In this study, the Martin’s rule of free energy additivity is extended to cover the density of a liquid, where Δ G is defined as free energy of volumetric expansion of a liquid.…”

Section: Theorymentioning

confidence: 99%

Estimation of Density of Biodiesel

Phankosol¹,

Sudaprasert²,

Lilitchan

et al. 2014

Energy Fuels

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Density of biodiesel is an important physical property of liquid fuel and biodiesel. A slight change in density can affect engine output power. In this work, density of a saturated, unsaturated fatty acid methyl ester or a biodiesel can be estimated from either (1) its number of carbon atoms (of fatty acid, z) and number of double bonds (n d ): ln ρ = −0.435 − 0.0025z + 85.98/T + 0.792z/T + 4.0 n d /T or (2) its saponification number (SN) and iodine value (IV): ln ρ = −0.427 − 10/SN + 83.38/T + 3168.95/(T × SN) + 11 IV/(T × SN), where T is absolute temperature. The predicted densities at different temperatures from both equations agree well with the reported literature values.

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“…Some researches are carried out for the correlation of pure substances. − For the enthalpies of electrolyte solutions, Silvester et al calculated the enthalpy and heat capacity of sodium chloride up to 300 °C. Srisaipet et al proposed a relationship between vapor pressure and vaporization enthalpy by an extension of the Martin equation. The empirical method for estimation of FPD/BPE or enthalpy of vaporization in the literature usually has very limited applications, only effective for a specific system.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Freezing Point Depression, Boiling Point Elevation, and Vaporization Enthalpies of Electrolyte Solutions

Wang

2009

Ind. Eng. Chem. Res.

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A novel approach is presented in this work for predicting the values of freezing point depression and boiling point elevation for electrolyte solutions at different concentrations on the basis of the Pitzer theories. This method treats the enthalpy change of the solution between the normal freezing point or boiling point and the real ones to be linear temperature dependence. Compared with the literature values, this method performs very well; also, the temperature-dependent parameters of some salts are incorporated to investigate temperature effects of this method. Furthermore, a method based on the Clausius-Clapeyron equation is derived for estimation of the enthalpy of vaporization of very high concentration solutions at different temperatures, and the predicted results are highly positive.

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The relationship between vapour pressure, vaporization enthalpy, and enthalpy of transfer from solution to gas: An extension of the Martin equation

Cited by 6 publications

References 23 publications

Free Energy Contribution to Gas Chromatographic Separation of Petroselinate and Oleate Esters

Free Energy Contribution to Gas Chromatographic Separation of Petroselinate and Oleate Esters

Estimation of Density of Biodiesel

Estimation of Freezing Point Depression, Boiling Point Elevation, and Vaporization Enthalpies of Electrolyte Solutions

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