Low-temperature deactivation and oxidation state of Pd/γ-Al2O3 catalysts for total oxidation of n-hexane

Low-Temperature Complete Oxidation of Ethyl Acetate Over CeO2-Supported Precious Metal Catalysts

“…Alumina is the most popular support material for precious metals to disperse on it, and many researchers have reported that Al 2 O 3 -supported precious metal catalysts exhibit high activity for the combustion of VOCs [5][6][7][8][9][10]. However, higher temperature is required for the catalytic oxidation of ethyl acetate over this catalyst system as compared with that of the other VOCs such as alcohol and aromatic compounds [11].…”

Selective reduction of NOx by liquid hydrocarbons with supported HPW–metal catalysts

“…In fact, the storage function of this catalyst (HPW) is not affected while the reduction function, which involves the noble metal, is markedly decreased. It is possible to propose that the expected mild hydrocarbon oxidation (to generate active C x H y O z oxygenated compounds), possible at this temperature range [14], continues up to CO 2 formation or that hydrocarbon is not oxidised at all and poisons the active sites by covering them. The first hypothesis is more probable since CO 2 is detected by mass spectrometry.…”

Toluene deep oxidation over noble metals, Copper and Vanadium Oxides

“…Concerning palladium catalyst, Ihm et al [29] have found that hydrogen-treated 5 wt% Pd-c-Al 2 O 3 catalysts (mainly with metallic Pd) were more active for nhexane complete oxidation at low-temperatures than air-treated catalysts (mainly with palladium oxide), even if the palladium oxide is known to be an active phase for high-temperature combustion of methane, and that the activity of reduced palladium catalysts decrease gradually during oxidation reaction and became equivalent to the activity of oxidized palladium catalysts. Since our catalyst was reduced before reaction, a similar behavior may be expected.…”