堆照AlN干法提取Ba^(14)CO_(3)工艺的反应热力学与动力学分析  

Reaction Thermodynamics and Kinetics Analysis of Dry Extraction of Ba^(14)CO_(3)by Irradiated AlN

作　　者：曹骐[1] 陈云明[1] 张劲松[1] 罗宁[1] 代爽 鲁芸芸[1] 杨雨 Cao Qi;Chen Yunming;Zhang Jingsong;Luo Ning;Dai Shuang;Lu Yunyun;Yang Yu(Nuclear Power Institute of China,Chengdu,610065)

机构地区：[1]中国核动力研究设计院,成都610065

出　　处：《核动力工程》2023年第4期128-132,共5页Nuclear Power Engineering

摘　　要：通过热力学计算软件(HSC)对堆照AlN复杂物系下的一段高温氧化反应及主要反应单元进行了初步的热力学与动力学分析,并进行了实验验证。结果表明:为提高14CO_(2)的产率,需保证反应时O_(2)充足;反应速率由O_(2)的吸附和14CO_(2)的脱附过程的扩散控制;应从改善气-固反应物的反应器选型、接触方式、接触时间、反应温度等方面着手改进工艺从而提高反应速率。本文研究结果为批量化制备高比活度Ba^(14)CO_(3)提供了重要技术支持。The reaction thermodynamics,kinetics analysis and demonstration test of a high temperature oxidation reaction under complex irradiated AlN system was carried out by thermodynamic calculation software(HSC).The results show that it is necessary to ensure sufficient O_(2)during the reaction to improve the yield of 14CO_(2).The reaction rate is controlled by the diffusion of O_(2)adsorption and 14CO_(2)desorption.To improve the reaction rate,the process should be improved from the aspects of reactor selection,contact mode,contact time and reaction temperature of gassolid reactants.It provides important technical support for batch preparation of high specific activity Ba^(14)CO_(3).

关 键 词：堆照AlN 干法提取 Ba^(14)CO_(3) HSC 

分 类 号：TL922[核科学技术—核燃料循环与材料]