Fluid Catalytic Cracking (FCC) catalysts, as porous molecular materials widely used in the refining and chemical industry, usually take Y-type zeolite molecular sieves as their active components. Endowed with regular crystal structures and uniform pore size distributions, these catalysts are capable of achieving shape-selective catalysis based on molecular dimensions. However, the spent catalysts deactivated gradually during the reaction process contain heavy metals such as nickel and vanadium, and have been classified into the HW50 category in the National Hazardous Waste List, belonging to toxic industrial waste that strictly prohibits illegal disposal. Therefore, achieving the stable solidification of heavy metals in spent catalysts and their resource utilization has become a key research topic at present.

Focusing on the potential application value of spent FCC catalysts, Sinokle has made full use of the high specific surface area and excellent adsorption performance of their molecular sieve frameworks. By loading metal components with ozone catalytic activity such as rare earths, nickel, and vanadium, and combining with independently developed ozone catalytic oxidation technology, the company has successfully prepared high-performance heterogeneous ozone catalytic materials using spent catalysts as the main raw material.

Taking various transition metals (including some precious metals) as active components, this catalytic material has formed a composite system with high adaptability and catalytic activity through systematic engineering experiment verification and ratio optimization. The preparation process adopts a multi-stage precise temperature-controlled sintering process, which not only maintains the material activity but also significantly improves its structural stability, effectively inhibiting the leaching of active components during use and avoiding the risk of secondary pollution. Through special pore structure construction technology, the material exhibits high specific surface area and excellent mechanical strength, extending its service life. The carrier surface has superhydrophilic properties, which can effectively prevent pollution deposition and pore blockage, ensuring the long-term stable operation of the device.

This material can significantly promote the decomposition process of ozone in the aqueous phase and increase the generation concentration of hydroxyl radicals (·OH), thereby enhancing the oxidation treatment efficiency. Its oxidation efficiency is 2 to 5 times higher than that of the single ozone process. The catalytic mechanism is manifested in three main pathways:

1. Organic substances are adsorbed on the surface of the catalyst and decomposed by ozone or other active components.

2. Ozone and organic substances adhere to the catalyst surface, interact with each other on the surface to form complexes, generate intermediate products through oxidation reactions, desorb into the solution, and then be oxidized by ozone or active oxygen.

3. The catalyst first adsorbs ozone, decomposes it to generate active oxygen, and then decomposes organic substances in the aqueous solution or on the catalyst surface.

Although the traditional ozone water treatment process has the advantages of simple flow and no secondary pollution, it has the problem of low ozone utilization efficiency. The innovative ozone catalytic material system developed by Sinokle not only improves the reaction efficiency and reduces the treatment cost, but also realizes the resource recovery and utilization of spent FCC catalysts, providing a technical solution with broad application prospects for the advanced treatment of refractory industrial wastewater.