Solid heat carrier catalyst for thermal desorption of organic matter-contaminated soil and method for preparing same

A method for preparing a solid heat carrier catalyst comprising the following steps:

• (1) preparing a solid heat carrier by
• dissolving alumina powder, triethylene glycol diacrylate, and phenyl bis(2,4,6-trimethylbenzoyl)-phosphine oxide in an organic solvent;
• performing stirring in a dark room to obtain a slurry;
• then printing the slurry with a ceramic 3D printer, and performing synchronous photo-curing by using a laser of the ceramic 3D printer, to obtain a hollow alumina ball;
• and
• after obtaining the hollow alumina ball, placing the hollow alumina ball in a muffle furnace for calcination to obtain the solid heat carrier;
• (2) preparing a pierced hollow alumina ball with the outer surface masked by
• placing the hollow alumina ball obtained in step (1) in vinyltriethoxysilane to immerse the hollow alumina ball therein, and then removing the hollow alumina ball from the vinyltriethoxysilane and placing the removed hollow alumina ball in a drying oven for drying to obtain a hollow alumina ball with the outer surface masked;
• then piercing the hollow alumina ball with the outer surface masked with a piercer to form at least two holes to make an inner surface thereof connected with the outside through channels to obtain a pierced hollow alumina ball with the outer surface masked;
• (3) preparing a catalytic active component precursor solution by weighing copper salt, nickel salt, vanadium salt and citric acid monohydrate, adding the same into deionized water and stirring in a water bath at 50° C. to 70° C. to obtain the catalytic active component precursor solution;
• and
• (4) preparing the solid heat carrier catalyst by
• immersing the pierced hollow alumina ball with the outer surface masked prepared in step (2) into the catalytic active component precursor solution prepared in step (3);
• after adsorption for 1 h to 3 h, placing the immersed pierced hollow alumina ball in a blast drying oven for heat-preservation drying;
• and then
• placing the dried pierced hollow alumina ball in a muffle furnace for calcination to obtain the solid heat carrier catalyst.