Hydrogenation catalyst, and preparation method therefor and use thereof

A hydrogenation catalyst, comprising a carrier, an active component and an auxiliary agent;

• wherein the carrier has a directional honeycomb pore structure, an average pore size of the honeycomb pore is 5 to 20 μm, the active component and the auxiliary agent are loaded on an outer surface of the carrier and an inner wall of the honeycomb pore, and a catalytic layer is formed on the outer surface of the carrier and the inner wall of the honeycomb pore, and a thickness of the catalytic layer is 30 to 100 nm;
• wherein the hydrogenation catalyst is prepared by a method comprising following steps:
• 1) mixing a carrier raw material with a solvent, followed by ultrasonication, then adding a binder, followed by ball milling to obtain a carrier slurry;
• 2) freezing and drying the carrier slurry to obtain a carrier blank;
• 3) calcining the carrier blank to obtain a catalyst carrier;
• 4) adding a precursor impregnation liquid of the active component and the auxiliary agent to a surface of the catalyst carrier, and then treating the catalyst carrier under a vacuum condition, followed by drying and roasting to obtain the hydrogenation catalyst;
• wherein a calcination temperature is 1500 to 1700° C. and a calcination time is 1 to 5 h in step 3);
• the carrier is zirconium oxide, or zirconium oxide and aluminum oxide;
• the solvent is ethanol in step 1);
• the carrier raw material accounts for 10 to 20 wt % of a weight of the solvent;
• a freezing temperature is −70 to −170° C. in step 2);
• the precursor impregnation liquid of the active component and the auxiliary agent in step 4) is prepared by a process comprising following steps:
• mixing a metal salt of the active component and a metal salt of the auxiliary agent with water to prepare a precursor solution, and then adding a dispersant to the precursor solution under stirring to obtain the precursor impregnation liquid of the active component and the auxiliary agent;
• the dispersant is a urea.