Study on volatilization mechanism of ruthenium tetroxide from nitrosyl ruthenium nitrate by using mass spectrometer

The Role of Ruthenium in CO2 Capture and Catalytic Conversion to Fuel by Dual Function Materials (DFM)

“…The pure N2 purge verifies that Na2CO3 dispersed on γ-Al2O3 powder has the ability of desorb the CO2 reversibly in situ, consistent with dispersed CaO/Al2O3 substantiating that the binding interaction between CO2 and adsorbents is weak [33]. This property insures the desorption and spill-over of CO2 to Ru catalytic sites for methanation.…”

“…During the sample preparation, the 50 mg of 1.44% Ru/Na2CO3 was dried at 120 °C for 2 h and calcined at 250 °C for 2 h in air. When the precursor Ru(NO)(NO3)3 is heated, it has been reported that a mixture of oxides such as RuO, RuO2, RuO3, and RuO4 [33,34] form depending on the temperature.…”

A theoretical investigation on the intermolecular potential curve between ruthenium tetroxide and NOX (X = 1, 2)

“…During an accident at nuclear facilities, it can be released to the environment as ruthenium tetroxide (RuO 4 ) under oxygen‐containing atmospheric conditions due to its high volatility [1] (the melting point: 25.4°C and boiling point: 40°C [2, 3]). In particular, in the safety evaluation at fuel reprocessing plants, ruthenium release from the high‐level radioactive liquid waste (HLLW) has been the primary concern for several decades [4–9]. The HLLW is a concentrated nitric acid aqueous solution containing various FPs and needs to be cooled because of the decay heat.…”

“…The nitrosyl ligand settles in the axial position and the position and number of other ligands depend on the concentration of nitric acid. Using a concentrated nitric acid solution including ruthenium complexes, several experiments [4, 5, 7, 18] have been performed so far to investigate and simulate the ruthenium species behavior by constantly heating the solution until the solution is completely dried. The RuO 4 gas generation has been observed because the nitrosyl complex is oxidized with the nitric acid while the solution is boiling (the temperature is around 120°C).…”

Efectos del precursor de rutenio y del tratamiento térmico previo a la reducción en catalizadores de Ru/TiO2 evaluados en la hidrodesoxigenación de fenol

“…Se ha reportado que la calcinación a altas temperaturas puede favorecer la sinterización y movilidad de las especies óxido [94]. aunado a esto se ha reportado la formación de especies de RuO4 a partir de RuNO(NO3)3 [95]. Estos dos factores podrían influencias las propiedades de actividad y selectividad del catalizador final.…”