化工学报2025，Vol.76Issue(5)：2270-2278,9.DOI:10.11949/0438-1157.20241258
静态法测定WF6-MoF6体系汽液相平衡数据的误差分析与修正
Error analysis and correction of vapor-liquid equilibrium of WF6-MoF6 systems by static method
摘要
Abstract
The lack of vapor-liquid equilibrium data for nuclear-pure grade uranium fluoride and related fluoride impurities has become a bottleneck in the development of China's dry-process uranium purification and conversion technology.However,the complexity and particularity of the physical properties of the system have brought great difficulties to the accurate determination of the data.Therefore,a high-pressure corrosion-resistant static vapor-liquid equilibrium measurement device was designed and developed.The saturated vapor pressure data of pure components VF₅ and MoF₆,as well as the isothermal vapor-liquid equilibrium data of the WF₆-MoF₆ binary system at different temperatures,were measured.Emphasis was placed on conducting a comprehensive error analysis and data correction from three perspectives:device design,operation process,and analysis and detection.The results show that the impact of gas-phase sampling on the liquid-phase composition is less than five ten-thousandths;there is an error of approximately 0.5％when considering the raw material composition as the liquid-phase composition;reducing the purge gas velocity of gas-phase sampling and decreasing the heating rate can reduce errors,etc.After correcting the experimental data based on the results of error analysis and estimation,the thermodynamic consistency test was passed.This provides a supporting means for accurately obtaining the thermodynamic data of vapor-liquid equilibrium of metal fluorides.关键词
汽液平衡/二元混合物/氟化物/静态法/误差分析Key words
vapor-liquid balance/binary mixture/fluoride/static method/error analysis分类
化学化工引用本文复制引用
拓振光,高鑫,李荣亮,康绍辉,牛玉清,周志全,叶开凯,马海桃,刘顺,李洪..静态法测定WF6-MoF6体系汽液相平衡数据的误差分析与修正[J].化工学报,2025,76(5):2270-2278,9.基金项目
"十四五"核技术研发项目(HJSYF2024(11)) （HJSYF2024(11）
国家自然科学基金核技术联合基金重点项目(U2267225) （U2267225）
核资源与环境国家重点实验室联合创新基金(NRE2021-12) （NRE2021-12）
