水+甲烷系统的气液相边界曲线和临界线(英文)

Gas-Liquid Phase Boundary Lines and Critical Curve for the Water+Methane System

采用带有蓝宝石视窗和磁力搅拌的可变体积高压斧得出了水+甲烷系统的气液相边界曲线和临界曲线.实验温度为433.0-633.0K,实验压力为30.00-300.00MPa.实验确定了甲烷在富水区的亨利系数,结果显示,在433.0-603.0K的温度范围内,此亨利系数随着温度的升高而下降.本文还研究了甲烷+水系统的气液分配比以及偏摩尔溶解焓和偏摩尔溶解熵数据.结果发现,甲烷和水的内聚能密度差别很大.

The isothermal gas-liquid phase boundary lines and critical curve were determined for the water＋methane system. Experiments were performed in a high-pressure volume-variable autoclave with a sapphire window and magnetic stirring. The temperature range was from 433.0 to 633.0 K and pressure from 30.00 to 300.00 MPa. Henry coefficients of dilute methane solutions were determined; the results show that these coefficients decrease with increasing temperature in the range from 433.0 to 603.0 K. The equilibrium gas-liquid ratios, partial molar solution enthalpy, and partial molar solution entropy were also calculated. The results show that the difference in the cohesive energy density between methane and water is very large.