核化学与放射化学Issue(2)：71-76,6.DOI:10.7538/hhx.2015.37.02.0071
UF4氟化反应及其反应动力学
Fluorination of UF4 and Its Reaction Kinetics
摘要
Abstract
The gas-solid reaction of uranium tetrafluoride (UF4 )with fluorine (F2 )resulting uranium hexafluoride (UF6 )has been investigated using self-developed fluoride volatility equipment.In this study,the Fourier transform infrared spectroscopy (FTIR)was used for in-situ monitoring of fluorination process,while X-ray diffraction (XRD)and inductively coupled plasma-mass spectrometry (ICP-MS)to characterize the reaction product and the residue.Based on the analytical data,the process designed for recovery of uranium by fluo-ride volatility was evaluated.The results show that the fluorination process,and the in-situ monitoring of process by FTIR are feasible.In addition,the hydrogen fluoride (HF)as an impurity in the product is removed effectively by vacuuming at low temperature.The kinetic data indicates that the rate constant of fluorination reaction is 0.002 7 min-1 at 300 ℃ and 0.2 L/min φ= 5% F2 by fitting the experimental data using the shrinking core model of spherical particles.关键词
UF4/氟化反应/傅里叶红外光谱技术/动力学Key words
UF4/fluorination reaction/FTIR/kinetics分类
能源科技引用本文复制引用
孙理鑫,牛永生,张焕琦,胡聪伟,窦强,吴国忠,李晴暖..UF4氟化反应及其反应动力学[J].核化学与放射化学,2015,(2):71-76,6.基金项目
中国科学院战略性先导科技专项资助项目(XDA02030000) （XDA02030000）
