Properties Of Copper Catalysts Research Articles

The effect of supports on hydrogenation and water-tolerance of copper-based catalysts

Suitable interactions and the formation of Cu–MxOy interfaces could improve the water-tolerant hydrogenation properties of copper catalysts.

The effect of palladium and CeO2 on the catalytic and physicochemical properties of copper catalysts in methanol synthesis

This paper deals with the study of the bimetallic Pd–Cu and monometallic Cu, Pd catalyst used in the methanol synthesis reaction. To reveal the influence of the catalyst properties on methanol production, various characterization techniques were used, such as Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction, TPR-H2 and TPD-NH3. The catalytic activity was studied in CO hydrogenation under elevated pressure (4.8 MPa) in a fixed bed high-pressure reactor. The activity results confirmed the promotion effect of palladium and CeO2 on the catalytic activity of copper catalysts. The highest activity and selectivity of Pd–Cu/ZnAl2O4–5 % CeO2 is explained by the Pd–Cu alloy formation during activation process. The presence of adsorption species attributed to b-HCO3–Ce, b-HCOO–Ce and b-HCOO–Ce species on the surface of CeO2 promoted catalysts was confirmed by FTIR method.

The Catalytic Properties of Copper Catalysts Prepared by Coprecipitation Method

A series of copper catalysts were prepared by coprecipitation method and used for treating the Acid Red B wastewater with catalytic wet air oxidation method. Various parameters which influence the activity the catalyst in the process were optimized. Results showed that when (NH4)2CO3 was used as precipitating agent, and the concentration was 0.8mol / L, precipitation temperature was 40 °C, calcination temperature was 600 °C, the copper catalysts prepared by direct addition method showed better activity in treating the wastewater.

Effect of reactant mixtures on catalytic properties of copper catalysts in oxidation of propylene

Effect of reactant mixtures on catalytic properties of copper catalysts in oxidation of propylene