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Article Dans Une Revue Industrial and engineering chemistry Année : 2011

Vapor-pressure measurements and modeling of dipentaerythritol ester lubricants

Résumé

The aim of this work is to present new vapor-pressure measurements and provide a good description of the volumetric and phase behavior of dipentaerythritol ester (DiPEs) lubricants, using the Statistical Associating Fluid Theory (SAFT) model (PC-SAFT and SAFT-VR versions). Characteristic parameters of these versions were optimized for dipentaerythritol hexapentanoate (DiPECS), dipentaerythritol hexaheptanoate (DiPEC7), and dipentaerythritol isononanoate (DiPEiC9), using experimental vapor pressures and densities. With these parameters, compressed densities were predicted. Experimental vapor pressures, determined by a gas saturation apparatus, range between 2 x 10(-5) Pa and 16 Pa, whereas the absolute deviations obtained in the correlations for both versions of the model (PC-SAFT and SAFT-VR) are between 10(-6) Pa and 1 Pa. In the case of saturated densities, the average absolute deviation (AAD) values, for both models, range from 0.2% to 1.3%, except for DiPEC7, where the AAD is 4.4% when using the SAFT-VR model. The SAFT-VR version gives slightly better correlations, although we must note that this version has four parameters, whereas the PC-SAFT version has three
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Dates et versions

hal-00877495 , version 1 (28-10-2013)

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Josefa Garcia, Ramy Abou Naccoul, Josefa Fernandez, Antonio Razzouk, Ilham Mokbel. Vapor-pressure measurements and modeling of dipentaerythritol ester lubricants. Industrial and engineering chemistry, 2011, 50 (8), pp.4231-4237. ⟨10.1021/ie102166r⟩. ⟨hal-00877495⟩
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