Inserted hydrogen promotes oxidation catalysis of mixed Ru_0.3Ti_0.7O₂ as exemplified with total propane oxidation and the HCl oxidation reaction

Abstract

The solid solution of a reducible oxide with a (non or) less reducible oxide may open the way to incorporate substantial amounts of hydrogen by the simple exposure to H2...

Promotion of ZrO2 on RuO2/Al2O3 Catalyst for HCl Catalytic Oxidation: Effect of High Temperature Holding in Nitrogen Atmosphere

“…In addition, the authors surmised that hydrogen was combined into the rutile lattice and changed the lattice parameters, leading to the reduce of the adsorption energy of chlorine. 22 This work indicated evidence for the significance of adjustment of the lattice parameters of RuO 2 in HCl catalytic oxidation.…”

“…This effect has been identified in literature that RuO 2 lattice parameters are closely related to the difficulty of Cl 2 desorption, which is the rate-limiting step in HCl oxidation. In addition, Over et al also reported that the significantly increased activity of HCl oxidation was obtained on the H-doped Ru 0.3 Ti 0.7 O 2 with the changes of lattice parameters …”

“…In 2013, Over predicted that the aqueous (hydrogen) RuO 2 catalyst would develop into a potential excellent catalyst in HCl catalytic oxidation, considering its excellent performance in the chlorine evolution reaction (CER) process revealed by Mills. , Recently, Over et al reported that the H-doped Ru 0.3 Ti 0.7 O 2 delivered the significantly improved activity in HCl catalytic oxidation. In addition, the authors surmised that hydrogen was combined into the rutile lattice and changed the lattice parameters, leading to the reduce of the adsorption energy of chlorine . This work indicated evidence for the significance of adjustment of the lattice parameters of RuO 2 in HCl catalytic oxidation.…”

“…In addition, Over et al also reported that the significantly increased activity of HCl oxidation was obtained on the H-doped Ru 0.3 Ti 0.7 O 2 with the changes of lattice parameters. 22 In order to investigate the effect of nitrogen heat treatment on the step of desorption of chlorine gas during the reaction process, experiments with pulse feeding of HCl and O 2 were carried out. The catalysts were first treated with HCl gas at the reaction temperature (573 K) for 4 h to ensure that the absorption of HCl on the catalyst reached saturation.…”

Highly active and stable RuO2/MgF2 catalysts for efficient HCl oxidation in the fluorochemical industry

“…10 Besides, some economic and robust alternatives, such as CeO 2 , CeO 2 -MnO x , U 3 O 8 , Ru 0.3 Ti 0.7 O 2 , and CuCrO 2 , turned out to be promising Deacon catalysts, since they were active and stable at elevated reaction temperatures. [11][12][13][14][15][16][17][18] In the last decade, a major breakthrough in the Deacon process has been achieved with the development of TiO 2 (rutile) or SnO 2 (cassiterite) supported RuO 2 catalysts, which have shown a high activity at a low temperature and a remarkable stability against chlorination and sintering of the active RuO 2 species on the supports. [19][20][21][22][23] However, these benchmark catalysts are easily deactivated in the catalytic oxidation of HCl with a small amount of HF, because their supports react with HF under the oxidation reaction conditions.…”