Abstract
Phase boundaries between homogeneous liquid phase and two-phase regions, both liquid-vapour and liquid-solid, and the phase boundary between the two-phase liquid - vapour region and the three-phase liquid - vapour - solid region were experimentally determined under pressure on the system methane + decane + heavy fraction using a full visibility sapphire cell. Measurements were performed on different mixtures made up of 90% of the binary mixture methane + decane (with a molar fraction of methane of about 50 %) and 10 % of a heavy fraction composed of various distributions of heavy normal paraffins centered around C 22. The liquid-solid phase transition was investigated up to 45 MPa and fluid phase boundary was studied in the temperature domain from 293 K to 423 K.
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