The characteristics of wet air oxidation of phenol over CuOx/Al2O3 catalysts: Effect of copper loading

Low-Temperature Catalytic Performance of Ni-Cu/Al2O3 Catalysts for Gasoline Reforming to Produce Hydrogen Applied in Spark Ignition Engines

“…With increase of Cu content, the first peak at low temperature between 200 and 270˝C could be due to the reduction of CuO particles while the second peak between 260 and 380˝C could correspond to the reduction of CuO bulk [44]. The range of reduction temperatures is wider, which could possibly be due to agglomeration of the CuO bulk to form larger crystallites [45]. Furthermore, the high-temperature peak shifted to a lower temperature with an increase in the Cu content, which is due to the added Cu that produces spillover hydrogen, which considerably accelerates the nucleation of the Ni metal under these reduction conditions, and enhances the reducibility of Ni [46].…”

“…Catalysts 2016, 6, 45 11 of 17 Figure 11 shows the effect of the Cu molar ratios on conversion and product selectivity over 18 wt. % Nix-Cu1−x/Al2O3 (x = 1, 0.7, 0.5, 0.3, 0) catalysts at the low temperature reaction of 550 °C.…”

“…When the S/C ratio increased over 0.9, H2 production decreased and the formation of CO2 increased slightly. This suggests that the formation of products derived from thermal decomposition, WGS, and catalytic cracking reactions is favored at stoichiometric reaction conditions due to the limited amount of steam for reforming reactions [44][45][46]. The 0.9 ratio of S/C is used for the rest of the Ni-Cu/γ-Al2O3 catalysts.…”

“…iso-Octane is initially broken down by thermolysis into lighter hydrocarbons, which are reformed by steam on the catalytic surface. The following simplified reaction scheme has been proposed and includes reforming/decomposition reactions and secondary chemical steps involving the different intermediate products [45].…”

Catalytic behaviour and copper leaching of Cu0.10Zn0.90Al1.90Fe0.10O4spinel for catalytic wet air oxidation of phenol

“…Additionally, the catalyst showed poor ability to adsorb phenol, as the phenol conversions were nearly zero when the reactions were started. In CWAO of phenol using many copper catalysts such as CuO x /Al 2 O 3 [11], CuO x /TiO 2 [12] and CuCeO x [13] at a low temperature of 150…”