超临界二氧化碳PVT性质计算研究  

Results of PVT Properties about Super-critical CO_2

作　　者：延洪剑 刘晖[1] 李金华[1] 

机构地区：[1]西安石油大学,陕西西安710065

出　　处：《广州化工》2015年第22期33-35,共3页GuangZhou Chemical Industry

摘　　要：通过用BWR方程、Exp-RK立方型方程和81型马丁-候方程对超临界状态下CO2的P-V-T性质进行计算,得出CO2在超临界状态时的压力值P并与实验数值进行比对,分析其偏差。可知,使用Exp-RK方程跟81型马丁-候方程计算超临界状态下CO2的偏差都较小,两方程都可适用于超临界状态下二氧化碳P-V-T性质的计算。81型马丁-候精确度较高,Exp-RK方程公式简便、参数较少,用于超临界状态的工程计算也非常方便。The P-Ⅴ-T properties of super-critical CO2 were calculated by using BWRS equation, Exp-RK cubic equation of state and 81 Martin hou equation. It was concluded the pressure of super-critical CO2 and compared with the experimental value, analysis of the deviation. It was known that CO2 super-critical state deviations were smaller by using the Exp-RK cubic equation of state and 81 Martin hou equation, this two equations can be applied to super-critical CO2 condition of P-Ⅴ-T properties calculation. The accuracy of 81 Martin hou equation was higher, the Exp-RK cubic equation of state was simple, less parameters, it was very convenient for calculating the super-critical state.

关 键 词：二氧化碳 超临界 热力性质 状态方程 

分 类 号：O414.12[理学—理论物理]