核化学与放射化学2016，Vol.38Issue(6)：347-352,6.DOI:10.7538/hhx.2016.38.06.0347
微量热法研究硝酸体系中N,N-二甲基羟胺的热稳定性
Thermal Stability of N,N-Dimethylhydroxylamine in Nitric Acid Solution by Microcalorimetry
曹智 1卞晓艳 1晏太红 1李传博 1李辉波 1何喜红 1郑卫芳1
作者信息
- 1. 中国原子能科学研究院 放射化学研究所，北京 102413
- 折叠
摘要
Abstract
The thermal stability of N,N-dimethylhydroxylamine (DMHAN)in the nitric acid solution was studied using micro calorimeter.The main influence factors including the nitric acid concentration,the concentration of DMHAN,MMH,atmosphere(air and nitro-gen)and metals were studied and compared the thermal stability of DMHAN with HAN under the same conditions.The results show that the initial reaction temperature (t0 )of DMHAN/HNO3 (HNO3:1.5-3.0 mol/L,DMHAN:0.05-0.8 mol/L)is improved as the acidity reduces or the concentration of DMHAN increases.The reaction heat of DMHAN/HNO3 is 865.5 kJ/mol and 683.4 kJ/mol respectively when the mole concentration ratios of HNO3 to DMHAN are 2.5-10 and 12.5-20.This indicates the different ratio of HNO3 to DMHAN makes the scale of reactions different in the DMHAN/HNO3 ,so it makes the different reaction heat.Holding reductant MMH make the induction period of the autocata-lytic reaction become longer.The air,nitrogen atmosphere,Fe and the fission products (Zr, Ru)do not affect the decomposition of DMHAN,but the stainless steel make the DMHAN/HNO3 show higher reactivity.关键词
二甲基羟胺/热稳定性/微量热法Key words
N,N-dimethylhydroxylamine/thermal stability/microcalorimetry分类
化学化工引用本文复制引用
曹智,卞晓艳,晏太红,李传博,李辉波,何喜红,郑卫芳..微量热法研究硝酸体系中N,N-二甲基羟胺的热稳定性[J].核化学与放射化学,2016,38(6):347-352,6.
