MODELING OF THE PHASE EQUILIBRIUM OF THE SYSTEM METHANE + CARBON DIOXIDE IN WIDE RAGES OF CONDITIONS

S. B. RODRIGUEZ-REARTES; M. S. DÍAZ; M. S. ZABALOY

Los COCOS

Congreso; III Reunión Interdisciplinaria de Tecnología y Procesos Químicos (RITEQ 2014); 2014

IDTQ

In this work we model the phase behavior of the carbon dioxide + methane system over wide ranges of temperature, pressure and composition. We consider the solid phase to be made of only carbon dioxide. Besides, we: (a) compare model calculations with solid-liquidvapor, solid-fluid and fluid-fluid experimental data, (b) calculate the required univariant lines to establish what the predicted fluid phase behavior type (van Konynenburg and Scott, 1980) is, (c) consider the quantitative performance of the predicted solid-liquid curve for pure CO2 and, (d) model the fluid state using mixing rules cubic with respect to composition (CMRs) (Zabaloy, 2008, Cismondi et al 2010).