哈尔滨工程大学学报2023，Vol.44Issue(12)：2157-2162,6.DOI:10.11990/jheu.202309026
基于碳酸盐环境的甲基三辛基碳酸铵萃取铀的分配比模型
Distribution ratio model for extraction of uranium with methyltrioctylammonium carbonate based on carbonate system
摘要
Abstract
In this study,a distribution ratio model for extraction of uranium by methyltrioctylammonium carbonate was established to address the issue of difficult process design in the extraction process of alkaline spent nuclear fuel reprocessing based on carbonate system,namely the CARBEX process.The effects of carbonate and uranium con-centrations in the aqueous phase,extractant concentration,and phase volume ratio were mainly investigated.Based on the extraction equilibrium equation of UO2(O2)(CO3)4-2 extracted by methyltrioctylammonium carbonate in a carbonate system,a distribution ratio model of uranium was established by segmental fitting using the method of separating variables.The results revealed that compared with the experimental value,the relative error of the model is within±10%.However,some data deviations are too large.The analysis shows that the model is appropriate when the uranium concentration in the organic phase reaches half of the extractant concentration before extraction.However,when the concentration exceeds half,the chemical form of uranium will change in the organic phase,and the model will no longer be applicable.关键词
乏燃料后处理/碳酸盐体系/萃取分离/甲基三辛基碳酸铵/过氧碳酸铀酰/分配比模型/变量分离/分段函数Key words
spent fuel reprocessing/carbonate system/extraction separation/methyltrioctylammonium carbonate/uranyl peroxy-carbonate/distribution ratio model/separation of variable/piecewise function分类
能源科技引用本文复制引用
方豪凡,何明键,矫彩山,张萌,王靖阳..基于碳酸盐环境的甲基三辛基碳酸铵萃取铀的分配比模型[J].哈尔滨工程大学学报,2023,44(12):2157-2162,6.基金项目
国家自然科学基金项目(U196720065) （U196720065）
黑龙江省核动力装置性能与设备重点实验室开放基金项目(HLJS202209). （HLJS202209）
