摘要
在有些油气田中 ,二氧化碳的含量比较高。如我国莺—琼盆地的崖 1 3 - 1油气田的二氧化碳含量为9.6 % ,东海平湖油田中二氧化碳含量为 3 .95 %。当其在多组分混合物中的分压小于 0 .51 6MPa,温度低于 - 56 .5℃时 ,将成为固相 ,堵塞管道 ;同时在天然气液化流程中液化二氧化碳是不经济的。为此在天然气液化前要除去它 ,通过相变分离是除去二氧化碳的一种方法。文章测量了N2 、CH4 和CO2 三元体系在温度为 2 2 7.1 5K ,压力为 2 .0MPa、2 .5MPa、3 .0MPa下的相平衡数据 ;用试验数据关联了试验温度下SRK方程和PR方程中的CO2 与N2 、CO2 与CH4 的二元交互作用系数 ;并对试验数据进行关联及验证性计算。
The CO 2 content in some oil and gas field in China is relatively high.For instance,the CO 2 content in 13 -1 oil and gas field in Yin Qiong basin is 9.6% and that in Pinghu oil field in East China Sea is 3.95%.When the fractional pressure of CO 2 in multi component mixture is less than 0.516 MPa and the temperature is lower than -5 6.5℃,CO 2 will become solid phase and will plug pipeline.Moreover,liquef action of CO 2 in the process of liquefying natural gas is not economic.For t his reason,CO 2 should be eliminated before liquefying natural gas.Phase chan ge seperation is a method for eliminating CO 2.In this paper,the phase equil ibrium data of N 2,CH 4 and CO 2 at the temperature of 227.15K and t he pressure of 2.0MPa,2.5MPa and 3.0MPa are measured.By using these data,the dua lity interaction coefficients-KN 2 CO 2 and K CH 4 CO 2 in t he SRK and PR equations at the experimental temperature are calculated and the experiment data are correlated and verified.At last,the calculated value is comp ared with the experimented one.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2002年第5期84-87,共4页
Natural Gas Industry
基金
国家自然科学基金的资助项目名称:新型天然气液化流程的热力研究
595760 0 1
