摘要
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℃ to 55℃ and the activation energy were obtained to be 31.51 k J/mol and 65.68 kJ/mol for the stepwise reduction and autocatalytic reduction,respectively.
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 ℃ to 55℃ 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.
