Abstract

The speed of sound in a synthetic and a real distillation cut has been measured up top= 150 MPa in the temperature rangeT= (293.15to373.15) K. The synthetic system, which is representative of distillation cuts, is made up of five components with high boiling point temperatures of aboutTb= 523 K belonging to essential chemical families found in natural fluids {iso, or n-paraffins, naphthenes, and aromatics (alkybenzene, or alkylnaphtalene)}. The distillation cut comes from the separation of a standard crude oil by distillation aroundT= 523 K. The measurements allow the evaluation of various thermophysical properties such as densities, and isentropic and isothermal compressibilities up top= 150 MPa with the help of additional density measurements performed at atmospheric pressure.

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