Liquid-Vapor Equilibria for Ternary Natural Gas Systems

摘要

Vapor-liquid equilibria were measured for the binary systems methane + carbon dioxide at 230, 250 and 270 K; methane + ethane at 210, 230, 250 and 270 K; and ethane + carbon dioxide at 210, 213, 230 and 250 K. The ternary system methane + ethane + carbon dioxide was studied at 230 K over the pressure range 1.15 MPa to 6.59 MPa. The Peng-Robinson equation of state was used to model the experimental data with an accuracy sufficient for most engineering calculations. Preliminary studies were made of the solid-liquid-vapor equilibria for the binary systems methane + carbon dioxide and ethane + carbon dioxide.