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Thermodynamic and structural analyses were carried out by X-ray diffraction and differential thermal analyses as functions of the temperature on multi-alkane samples whose distribution of mole fractions shows a shape of the ‘exponential decreasing’ type, as observed in petroleum cuts. Nine samples, whose number of normal-alkanes, C n s, varied from 15 up to 23, were studied with continuous...
Structural analyses were carried out by X-ray diffraction, at ambient temperature, on multi-alkane samples whose mole fraction distribution shows a shape of the ‘exponential decreasing’ type, as observed in petroleum cuts. Nine samples, whose normal-alkane number varies from 15 to 23, have been studied with mole fraction continuous distributions of normal-alkanes going from C 22 –C 36...
A general review of temperatures and enthalpies of (solid + solid) and (solid + liquid) transitions of pure normal alkanes is presented. Mean values are determined from literature data on pure normal alkanes for methane up to the alkane of carbon atom number n equal to 390. Melting temperatures and (solid + liquid) and (solid + solid) transition enthalpies are expressed as a function of the carbon...
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