Differences in Deterioration Behaviors of Cu/ZnO/Al<sub>2</sub>O<sub>3</sub> Catalysts with Different Cu Contents toward Hydrogenation of CO and CO<sub>2</sub>
Tanutporn Kamsuwan, Adisak Guntida, Piyasan Praserthdam, Bunjerd Jongsomjit
Abstract
site on the spent CZA catalyst having a low Cu loading (sCZA-L) was oxidized to CuO and the aggregation of metal crystallite sites (Cu-ZnO and ZnO) was observed. Moreover, the amount of carbon deposition on sCZA-L (ca. >2%) is higher than the spent CZA catalyst having a high Cu loading (sCZA-H, ca. <0.5%). These phenomena led to a decrease in the surface area and the blockage of active sites. These findings can be determined on the catalytic deactivation and the obvious decrease in the catalytic activity of the CZA catalyst having a low Cu content (CZA-L, Cu:Zn = 0.8).
Topics & Concepts
CatalysisX-ray photoelectron spectroscopyPhysisorptionCrystalliteMetalMaterials scienceCarbon fibersSpectroscopyChemical engineeringInorganic chemistryChemistryMetallurgyOrganic chemistryComposite materialQuantum mechanicsComposite numberEngineeringPhysicsCatalytic Processes in Materials ScienceCatalysts for Methane ReformingNanomaterials for catalytic reactions