29 / 2021-06-27 22:45:44

Bimetallic phosphide NiRuP as an efficient catalyst for hydrogenolysis of diphenyl ether

Key words：Hydrodepolymerization；Bimetal phosphide；diphenyl ether；Lignin；Model compound

Gas-phase SiO₂ was used as a carrier for the preparation of supported bimetallic phosphorus catalyst NiRuP/SiO₂. Powder X-ray diffraction (XRD), pyridine adsorption infrared (Py-IR), ammonia-temperature programmed desorption (NH₃-TPD), scanning electron microscope (SEM), transmission electron microscope (TEM) and  X-ray photoelectron spectroscopy (XPS) and other means were used to characterize the prepared catalyst in detail. Using diphenyl ether as the model compound of lignin, the reactivity of NiRuP/SiO₂ hydrogenodepolymerization 4-O-5 type ether bond was investigated. The results show that when the ratio of the amount of Ni to Ru is 5:1, the catalyst Ni₅Ru₁P/SiO₂ prepared has a higher reaction activity for the hydrogenation of polydiphenyl ether under the conditions of 250 ℃and hydrogen pressure of 0.2 MPa. In terms of selectivity, the conversion rate of diphenyl ether is over 97%, the yield of benzene is 50%, and the yield of phenol is 26%.