物理化学学报 >> 2012, Vol. 28 >> Issue (08): 1803-1808.doi: 10.3866/PKU.WHXB201205211

热力学,动力学和结构化学 上一篇    下一篇

水+甲烷系统的气液相边界曲线和临界曲线

田玉琴1,2, 田宜灵, 赵林1, 朱荣娇, 马超1   

  1. 1. 长江大学石油工程学院, 湖北 荆州 434023; 1§天津大学理学院化学系, 天津 300072;
    2. 中国石油化工股份有限公司胜利油田采油工艺研究院, 山东 东营 257000
  • 收稿日期:2012-03-07 修回日期:2012-05-21 发布日期:2012-07-10
  • 通讯作者: 朱荣娇 E-mail:zhurongjiao@tju.edu.cn

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

TIAN Yu-Qin1,2, TIAN Yi-Ling, ZHAO Lin1, ZHU Rong-Jiao, MA Chao1   

  1. 1. College of Petroleum Engineering, Yangtze University, Jingzhou 434023, Hubei Province, P. R. China; 1§Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China;
    2. Institute of Production Technology, Shengli Oilfield Company, China Petroleum & Chemical Corporation, Dongying 257000, Shandong Province, P. R. China
  • Received:2012-03-07 Revised:2012-05-21 Published:2012-07-10
  • Contact: ZHU Rong-Jiao E-mail:zhurongjiao@tju.edu.cn

摘要:

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433.0-633.0 K, 实验压力为30.00-300.00 MPa. 实验确定了甲烷在富水区的亨利系数, 结果显示, 在433.0-603.0 K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.

关键词: 水+甲烷系统, 相边界曲线, 临界曲线, 亨利系数, 偏摩尔溶解焓, 偏摩尔溶解熵

Abstract:

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.

Key words: Water+methane system, Phase boundary line, Critical curve, Henry’s coefficient, Partial molar solution enthalpy, Partial molar solution entropy

MSC2000: 

  • O642