Porous carbon catalyst loaded with metal sulfides based on high-sulfur petroleum coke and preparation method therefor and application thereof

A method for preparing a porous carbon catalyst loaded with metal sulfides based on high-sulfur petroleum coke, comprising:

• (1) preparing an in-situ activated precursor:
• mixing a high-sulfur petroleum coke having a content of sulfur of 3-10 wt % with a transition metal salt in an ethanol aqueous solution thoroughly, and then evaporating and drying to obtain the in-situ activated precursor;
• the transition metal of the salt is nickel or niobium;
• (2) destabilizing bulk sulfur:
• grinding and mixing the in-situ activated precursor obtained from step (1) with an alkaline activator in a mass ratio of the alkaline activator to the high-sulfur petroleum coke of (1-5):(1-2), followed by placement in a tube furnace, heating from room temperature to a specified temperature of 600-800° C. at a controlled rate under an argon inert atmosphere, bulk sulfur is destabilized under the joint action of the specified temperature and alkaline activator;
• the alkaline activator is potassium hydroxide or sodium hydroxide;
• (3) conducting an in-situ metal-sulfur bonding reaction:
• maintaining the specified temperature from step (2), switching the argon atmosphere to hydrogen at a flow rate of 10-60 mL/min, and conducting the in-situ metal-sulfur bonding reaction for 1-2 hours, followed by cooling down to room temperature under an argon atmosphere;
• (4) washing and drying:
• washing the product obtained from step (3) with a washing solution, drying and grinding to obtain the porous carbon catalyst loaded with metal sulfides based on high-sulfur petroleum coke.