Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (1): S10304 doi: 10.13538/j.1001-8042/nst.26.S10304

• NUCLEAR CHEMISTRY,RADIOCHEMISTRY,RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles     Next Articles

Modeling the autocatalytic reaction between Tc(VII) and methyl-hydrazine in HNO3 solution

LIU Fang (刘方),1,* WANG Hui (王辉),1 WEI Yan (魏艳),1 and JIA Yong-Fen (贾永芬)1   

  1. 1China Institute of Atomic Energy, Beijing 102413, China
  • Contact: LIU Fang (刘方) E-mail:liuxinyu741@sohu.com
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LIU Fang, WANG Hui, WEI Yan,and JIA Yong-Fen. Modeling the autocatalytic reaction between Tc(VII) and methyl-hydrazine in HNO3 solution.Nuclear Science and Techniques, 2015, 26(1): S10304     doi: 10.13538/j.1001-8042/nst.26.S10304

Abstract:

The reduction of Tc(VII) by methyl-hydrazine(MMH) in HNO3 aqueous solution was studied under different
conditions. A logistic equation widely used for modeling autocatalytic reaction was adopted to simulate the
target reaction. All the experimental data were consistent with the proposed equation. Results showed that
Tc(VII) was reduced by MMH in two ways, the stepwise reduced by MMH and the autocatalytic reduced by
Tc(IV). Isothermal experiments were done at temperatures ranging from 40 C to 55 C and the activation energy
were obtained to be 31:51 kJ/mol and 65:68 kJ/mol for the stepwise reduction and autocatalytic reduction,
respectively.

Key words: Technetium, Autocatalytic reaction, PUREX, Methyl-hydrazine, Logistic equation