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.

中文翻译：

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用于布列斯特乏核氮化物燃料后处理的废气净化系统的一氧化二氮（半氧化氮）催化分解技术的模块化测试

一氧化二氮 N2O（二氧化氮）是乏氮化物燃料后处理过程中废气的有害成分之一。它在氮化物燃料在硝酸中溶解和高活性萃余液或中级废物蒸发的底部溶液的脱硝过程中进入气相。中和它的优选方法是高温催化分解。先前发现了基于涂有催化剂的γ-氧化铝的组合物。其中一种组合物在半工业装置上进行了检查。N2O 分解的效率作为温度的函数进行了研究。已确定在 465–480°C 时几乎完全分解。发现 N2O 在 425-480°C 分解的特定速率是初始浓度的函数。