摘要
求取二氧化碳在饱和液态甲烷中的溶解度,对于在较高温度下实现液化天然气至关重要。文中在理想溶液基础上,采用正规溶液关系式和改进的Scatchard-H ildebrand关系式进行二氧化碳的溶解度计算,并且在临界点附近采用经验公式对其进行修正。将上述计算结果与Davis实验数据进行比较后表明,改进的正规溶液理论计算方法在低于140K温区时可推荐用于此项溶解度计算,经验公式可用于接近临界温度区域的溶解度计算。
It is important to evaluate the solubility of solid carbon dioxide in saturated liquid methane for natural gas liquefaction at relatively high temperature.The regular solution theory and the modified Scatchard-Hildebrand equation were adopted on the basis of the ideal solution hypothesis,and an empirical equation was applied to amend the results near the critical temperature in this paper.The calculation results were compared with the experiment data from Davis,and it certifies that the modified S-H equation can be recommended for this kind of solubility calculation when the temperature is below 140K and the empirical equation is suitable for estimating the solubility near the critical temperature.
出处
《低温与超导》
CAS
CSCD
北大核心
2010年第9期17-21,共5页
Cryogenics and Superconductivity
关键词
二氧化碳
液体甲烷
溶解度
正规溶液理论
Carbon dioxide
Liquid methane
Solubility
Regular solution theory
