Modular Testing of Dinitrogen Oxide (Nitrogen Hemioxide) Catalytic Decomposition Technology for Off-Gas Cleanup Systems for Brest Spent Nuclear Nitride Fuel Reprocessing
| Autor: | O. A. Ustinov, Sergey A. Kulyukhin, Alexander Bessonov, I. A. Rumer, Yu. A. Voskresenskaya |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
020209 energy Inorganic chemistry Oxide chemistry.chemical_element 02 engineering and technology Raffinate Nitride Nitrogen Decomposition Catalysis chemistry.chemical_compound Nuclear Energy and Engineering chemistry Nitric acid 0202 electrical engineering electronic engineering information engineering Dissolution |
| Zdroj: | Atomic Energy. 127:99-104 |
| ISSN: | 1573-8205 1063-4258 |
| Popis: | Dinitrogen oxide N2O (nitrogen hemioxide) is one of the harmful components of the off-gases during the reprocessing of spent nitride fuel. It enters the gas phase during the dissolution of nitride fuel in nitric acid and denitration of high-activity raffinate or the bottom solution from the evaporation of intermediate-level wastes. The preferred method of neutralizing it is high-temperature catalytic decomposition. Compositions based on γ-aluminum oxide coated with catalysts were found previously. One of the compositions was checked on a semi-industrial setup. The efficiency of N2O decomposition was studied as a function of temperature. It was established that almost complete decomposition occurs at 465–480°C. The specific rate of N2O decomposition at 425–480°C was found as a function of the initial concentration. It is shown that for constant initial concentration of N2O the specific decomposition rate is almost the same in the investigated temperature interval. |
| Databáze: | OpenAIRE |
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