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2843651 
Journal Article 
Modeling the autocatalytic reaction between Tc(VII) and methyl-hydrazine in HNO3 solution 
Liu Fang; Wang Hui; Wei Yan; Jia Yong-Fen 
2015 
1 
Nuclear Science and Techniques
ISSN: 1001-8042 
26 
1 
82-86 
WOS:000352182700013 
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 degrees C to 55 degrees 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. 
Technetium; Autocatalytic reaction; PUREX; Methyl-hydrazine; Logistic equation 
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