High pressure phase equilibria in methane plus waxy systems. 2. Methane + waxy ternary mixture

abstract

Liquid-vapour and fluid-solid phase transitions were experimentally determined under pressure on the system methane + a ternary waxy mixture using a full visibility cell. The wax was an approximately equimolar mixture of n-C(16), n-C(17) and n-C(18), the composition being chosen to obtain a mixture with an average molecular weight similar to heptadecane. Measurements were performed according to the synthetic method on different mixtures ranging from 0 to 99.5 mol% of methane. The liquid-solid phase transitions were investigated up to 100 MPa and fluid phase boundary was studied in the temperature domain from 293 to 373 K. Measurements performed on this pseudo-binary system were compared to the phase diagram of the binary system methane + heptadecane. (C) 2010 Elsevier B.V. All rights reserved.

keywords

VAPOR-LIQUID-EQUILIBRIA; SYNTHETIC CONDENSATE GASES; SOLID-FLUID EQUILIBRIA; RESERVOIR FLUIDS; HIGH-TEMPERATURE; BINARY-SYSTEMS; 3-PHASE CURVE; BEHAVIOR; MODEL; CRYSTALLIZATION

subject category

Thermodynamics; Chemistry; Engineering

authors

Pauly, J; Coutinho, JAP; Daridon, JL

our authors

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