Improved equation for prediction of saturated liquid density

Spencer, Calvin F.; Danner, Ronald P.

doi:10.1021/je60053a012

Cited by 705 publications

(423 citation statements)

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“…We first evaluate molar volumes at a given temperature T using the Rackett equation (Spencer and Danner , 1972;Poling et al, 2007). This method is designed to estimate the saturated subcooled liquid molar volumes of pure hydrocarbons and organic solvents…”

Section: C1 Subcooled Liquid Molar Volumesmentioning

confidence: 99%

Dissolution on Titan and on Earth: Toward the age of Titan's karstic landscapes

et al. 2015

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Titan's polar surface is dotted with hundreds of lacustrine depressions. Based on the hypothesis that they are karstic in origin, we aim at determining the efficiency of surface dissolution as a landshaping process on Titan, in a comparative planetology perspective with the Earth as reference. Our approach is based on the calculation of solutional denudation rates and allow inference of formation timescales for topographic depressions developed by chemical erosion on both planetary bodies. The model depends on the solubility of solids in liquids, the density of solids and liquids, and the average annual net rainfall rates. We compute and compare the denudation rates of pure solid organics in liquid hydrocarbons and of minerals in liquid water over Titan and Earth timescales. We then investigate the denudation rates of a superficial organic layer in liquid methane over one Titan year. At this timescale, such a layer on Titan would behave like salts or carbonates on Earth depending on its composition, which means that dissolution processes would likely occur, but would be 30 times slower on Titan compared to the Earth due to the seasonality of precipitation. Assuming an average depth of 100 m for Titan's lacustrine depressions, these could have developed in a few tens of millions of years at polar latitudes higher than 70 • N and S, and a few hundreds of million years at lower polar latitudes. The ages determined are consistent with the youth of the surface (< 1 Gyr) and the repartition of dissolution-related landforms on Titan.

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Section: C1 Subcooled Liquid Molar Volumesmentioning

confidence: 99%

Dissolution on Titan and on Earth: Toward the age of Titan's karstic landscapes

et al. 2015

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“…The molar volumes v i o in saturation conditions were estimated using a modified version of Rackett's equation, using the values of Z RA given by Spencer and Danner. 37 The second virial coefficients for the pure B ii compounds and for the mixtures B 12 were estimated with the expressions proposed by Tsonopoulos,38 which are used to calculate the parameter δ 12 = 2B 12 − B 11 − B 22 . The values calculated with eq 7 are presented in Table 8, together with the corresponding to the adimensional Gibbs function g E /RT = ∑x i lnγ i and are represented graphically in Figures 4b to 9b for the six systems studied.…”

Section: Journal Of Chemical and Engineering Datamentioning

confidence: 99%

Multiproperty Correlation of Experimental Data of the Binaries Propyl Ethanoate + Alkanes (Pentane to Decane). New Experimental Information for Vapor–Liquid Equilibrium and Mixing Properties

et al. 2013

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A thermodynamic study is carried out on binary systems composed of propyl ethanoate with six alkanes, from pentane to decane. Vapor pressures of the ester and the isobaric vapor−liquid equilibria of these six mixtures were measured at 101.32 kPa in a small-capacity ebulliometer and also the mixing properties,h E over a range of temperatures and at atmospheric pressure. Adequate correlations are drawn for the surfaces y E = y E (x,T) with an interpretation on the behavior of the mixtures and also using c p E data from literature. The mixing processes are all endothermic with a change in the slope direction of the function h E = h

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“…The prediction of biodiesel density with this method was made with relative deviations between 0.2% and 0.7%. Recently Meng et al [37] revised the modified Rackett equation proposed by Spencer and Danner [38] to predict biodiesel densities over wide temperature range (298-523) K at atmospheric pressure. The revised Rackett equation allowed the density prediction for three biodiesels with a maximum deviation of 0.42%.…”

Section: Introductionmentioning

confidence: 99%