Phenol hydrogenation to cyclohexanol on a novel Pd7P3/SiC catalyst with high activity and selectivity

摘要

Aqueous catalytic phenol has been explored using Pd7P3/SiC catalysts in the presence of H-2. Palladium phosphide was prepared by oleoamine reduction and supported on silicon carbide. The physicochemical properties of the catalyst were characterized by inductively Coupled Plasma Emission Spectrometer (ICP-MS), X-ray diffractometer (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The results show that palladium phosphide is successfully supported on silicon carbide, and the dispersion is relatively uniform with the particle size is about 6-9 nm. Under the same catalytic conditions, a catalyst with a loading of 2.4 wt% exhibits the best activity. When the temperature is 40 degrees C, the initial pressure is 5 bar, the conversion of phenol can reach more than 99%, and the selectivity of cyclohexanol reaches 94% after 2 h reaction.