CF_4+C_3H_8体系汽液相平衡  

Vapor-liquid equilibrium for tetrafluoromethane+propane system

作　　者：刘燕妮[1] 郭开华[2] 鹿来运[2] 

机构地区：[1]广州大学土木工程学院,广东广州510006 [2]中山大学工学院,广东广州510275

出　　处：《化工学报》2013年第10期3514-3519,共6页CIESC Journal

基　　金：国家自然科学基金项目(51076169);广州大学2013年新苗计划项目(2013-07)~~

摘　　要：利用LNG冷能发电是目前应用较广，研究较多，技术要求最高的冷能利用技术。常规使用的冷能发电循环主要包括有机朗肯循环，LNG利用率一般不高于14％。为提高LNG冷能低温动力循环的利用率，本文作者提出一种带吸收器的新型高效低温动力循环，The isothermal vapor-liquid equilibrium （VLE） for tetrafluoromethane （CF4） ＋ propane （Calla） system was measured and P, T, y data were collected at temperatures of 142.96, 163.07, 183.10, 203.26, 223.17, 243.12, 263.15, 283.01 and 293.23 K. A vapor recirculation method was used to achieve quick equilibrium. The temperatures were measured with Ptl00 platinum resistance thermometers and the uncertainty was less than±0. 005 K. The pressure was surveyed by two absolute pressure transducers, one by Keller PA33 pressure transducer with a full scale of 2 MPa and uncertainty of ±200 Pa, and the other by Mensor 6100 with a full scale of 10 MPa and uncertainty of ±1 kPa. The mixture composition measurement was performed by using a gas chromatograph （Agilent HP 6890N）. After careful calibration, uncertainty was within ±0. 002 in mole fraction over the whole range of concentrations. The experimental results were correlated with the Peng-Robinson equation of state and the van der Waals two-parameters mixing rule. The mean deviations between the correlated and measured vapor compositions were found satisfactory as 0. 011 and the data showed good accuracy and consistency.

关 键 词：四氟甲烷 丙烷 汽液相平衡 

分 类 号：TK123[动力工程及工程热物理—工程热物理]