Catalyst for preparing biological aviation kerosene with castor oil, preparation method and application thereof

A method for preparing a catalyst, the catalyst for preparing biological aviation kerosene with castor oil, comprising porous large-specific surface nano-alumina as a carrier, NixMoW, NixCoW or NixCoMo as an active component, and Mn as an assistant, wherein mass of the active component accounts for 10-30% of total mass of the catalyst;

• x is an atomic ratio and ranges from 2 to 20;
• mass of the component Mn accounts for 1-5% of the total mass of the catalyst;
• and a specific surface area of the porous large-specific surface nano-alumina carrier is 500-800 m2/g;
• the method comprising the following steps:
• 1) adding aluminum isopropoxide into 0.05 mol/L of nitric acid, refluxing and stirring at 80° C. for 3-5 hours, adding cetyl trimethyl ammonium bromide, and continuously stirring for 2-3 hours to obtain a mixed solution;
• 2) adding sodium silicate into the mixed solution, refluxing and stirring at 80° C. for 3-5 hours, and aging at a room temperature for 2 hours to obtain a mixed solution;
• 3) adding ethyl orthosilicate into the mixed solution, refluxing and stirring at 80° C. for 3-5 hours, and aging at the room temperature for 2 hours;
• 4) adding 1-5% of sodium hydroxide into the mixed solution obtained in the step 3), refluxing and stirring at 80° C. for 3-5 hours, performing centrifugal separation, drying the obtained solid precipitate at 100° C., and calcining in a nitrogen atmosphere at 500-600° C. for 4-6 hours, thereby obtaining the large-specific surface nano-alumina carrier;
• 5) adding an assistant manganese chloride into an aqueous solution in an amount of three times that of mass of the carrier according to a ratio for stirring for 3 hours under room-temperature stirring conditions, adding the large-specific surface nano-alumina carrier for stirring 3-5 hours to obtain a mixed solution, performing suction filtration on the mixed solution, drying a solid product at 100° C. for 8 hours, and calcining in the nitrogen atmosphere at 500-600° C. for 4-6 hours to obtain solid powder;
• and
• 6) sequentially adding an active component soluble salt into the aqueous solution of an amount of three times of mass of the carrier according to a ratio for stirring for 3 hours under the room-temperature stirring conditions, adding the solid powder in the step 5) for stirring 3-5 hours to obtain a mixed solution, standing for 10 hours, drying the standing mixed solution at 100° C. for 8 hours, calcining in the nitrogen atmosphere at 500-600° C. for 4-6 hours, and reducing the obtained solid powder at 550-600° C. at hydrogen flow velocity of 200-300 mL/min for at least 3 hours, thereby obtaining the hydrodeoxygenation catalyst for preparing the biological aviation kerosene with castor oil.