Oxidation Mechanism of Tetravalent Uranium in Nitric Acid System Synthesized by Hydrogen Reduction Process

The oxidation of tetravalent uranium significantly affects its use as a reducing agent. This study focuses on a tetravalent uranium solution prepared through the hydrogen reduction process in the nitric acid system, excluding factors such as hydrazine that could impact the oxidation of tetravalent uranium. The study thoroughly investigates the influencing factors of tetravalent uranium oxidation, including temperature, acidity, etc. It is found that temperature has a critical point of impact on the oxidation of tetravalent uranium at 60(degrees)C. Below 60 C-degrees, although the oxidation rate of tetravalent uranium increases with temperature, there is no significant leap in rapid oxidation. However, at 60(degrees)C, tetravalent uranium undergoes rapid oxidation after an induction period. Through chemical composition analysis and experimental observation, the study clarifies the oxidation reaction mechanism and uncovers the reasons behind the induction period, providing guidance for the use of tetravalent uranium as a reducing agent.

Automated summary

This study investigates the oxidation process of tetravalent uranium and its impact on its use as a reducing agent, providing insights into the influencing factors and mechanism of tetravalent uranium oxidation.