Catalytic decomposition of hydrazine on ruthenium catalysts in nitric acid solutions

The reaction kinetics and mechanism of catalytic decomposition of hydrazine nitrate on Ru/C catalyst in nitric acid solutions

“…Based on related results and analyses reported in the literature, 14 the decomposition of hydrazine nitrate in nitric acid solution on Ru/C catalyst in our current work was accompanied by oxidation of the catalyst surface. And the oxidation of the Ru surface mediated by nitric acid resulted in the formation of RuO 2 and HNO 2 (eqn ( 5)).…”

Catalytic decomposition of hydrazine nitrate and hydroxylamine nitrate in radioactive nitric acid waste liquid using Ru/AC catalyst

“…This finding is consistent with Anan'ev et al 's experimental results, which suggested that the catalytic decomposition of HAN and HN involves reactions with nitrite and its derivatives generated in solution. 21,22 Higher temperature and increased concentration of HNO 3 promote the formation of nitrous acid in solution, thereby enhancing the decomposition rate of HAN and HN. 23…”

“…This finding is consistent with Anan'ev et al's experimental results, which suggested that the catalytic decomposition of HAN and HN involves reactions with nitrite and its derivatives generated in solution. 21,22 Higher temperature and increased concentration of HNO 3 promote the formation of nitrous acid in solution, thereby enhancing the decomposition rate of HAN and HN. 23 To investigate the influence of HAN and HN concentration on catalytic performance, the catalytic performance was evaluated in 1 mol per L HNO 3 with varying concentrations of HAN and HN at 80 1C, as shown in Table 6.…”

Catalytic decomposition of hydroxylamine nitrate and hydrazine nitrate using Ru/ZSM-5 catalyst under mild reaction conditions

“…Among various metal catalysts proposed for hydrazine decomposition, noble metals, such as Ru and Pt, exhibited good catalytic activity and stability in acid solutions. 14,15 However, only several examples have been reported focusing on the kinetics and mechanism of catalytic decomposition of hydrazine, [16][17][18][19][20] which proves that heterogeneous catalysis (reaction (3)) is a promising method for the decomposition of hydrazine and heterogeneous catalytic decomposition of hydroxylamine nitrate has not been reported in HNO 3 system. This method is simple and available, which offers several advantages: (i) reduced solid radioactive waste, (ii) ease of operation, (iii) simple device structure, (iv) small reactor volume.…”