期刊文献+

硝酸介质中单甲基肼与亚硝酸的反应动力学 被引量:2

Reaction Kinetics of Mono-methyihydrazine With Nitrous Acid in Nitric Acid Medium
下载PDF
导出
摘要 采用分光光度法研究硝酸介质中单甲基肼(MMH)与亚硝酸(HNO_2)的反应。HNO_2和MMH反应动力学速率方程为-dc(HNO_2)/dt=kc(H^+)c^(1.1)(NO_3^-)c^(1.1)(MMH)c(HNO_2)。当t=2.6℃、c(NO_3^-)=0.50mol/L时,反应速率常数k=(115±2)(mol/L)^(-3.2)·s^(-1),反应活化能E_a=(37.8±0.1)kJ/mol。研究结果表明:在硝酸介质中,甲基肼与亚硝酸能快速反应;提高酸度、MMH浓度或硝酸根浓度均有利于亚硝酸的还原。 The oxidation of mono-methylhydrazine (MMH) with nitrous acid in nitric acid medium was researched. The rate equation was determined as follows: --dc(HNO2)/dt=kc(H+)cII(NO3^-)c^1,1(MMH)c(HN02). The k is (115±2) (tool/ L)^-3.2· s^-1 and the corresponding activation energy E. is (37.8±0.1) kJ/mol with the nitrate concentration of 0.50 mol/L at the temperature of 2.6 ℃. The result indicates that the oxidation of MMH with nitrous acid is fast. The increase in the acidity and the concentration of MMH or NO3^- can speed the reduction of nitrous acid.
出处 《原子能科学技术》 EI CAS CSCD 北大核心 2008年第10期887-890,共4页 Atomic Energy Science and Technology
关键词 单甲基肼 亚硝酸 反应动力学 mono-methylhydrazine nitrous acid reaction kinetics
  • 相关文献

参考文献5

  • 1GOURISSE D, GAUTIER A. Distribution of nitrous acid in extraction with tributyl phosphonate[J]. J Inorg Nucl Chem, 1969, 31: 839.
  • 2何辉..N,N-二甲基羟胺在铀钚分离中的应用和计算机程序的开发[D]..北京:中国原子能科学研究院,,1998..
  • 3STEDMAN G, UYSAL N. Mechanism of the reaction between nitrous acid and t-butylhydrazine[J]. J Chem Res, Part S, 1987, 11:376-377.
  • 4WOODHEAD J. The absorption spectrum of nitrous acid in tributylphosphate and its appliction to analyses for nitrous acid, AERE-R 3432[R]. UK: AERE, 1960.
  • 5GOMES M G, BORGES S S, LUIZ G F, et al. UV-visible spectrum of nitrous acid in solution: pKa determination and analytical applications[J]. Chimica Acta, 1993, 282(1): 81-85.

共引文献2

同被引文献6

引证文献2

二级引证文献1

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部