Ozone Advanced Catalytic Oxidation (OZCO): Catalyst Design Factors and New Improvements

Ozone Advanced Catalytic Oxidation (OZCO) is an efficient water treatment or waste gas treatment technology that uses a catalyst to enhance the decomposition of ozone (O₃) into highly active radicals (such as ·OH), thereby rapidly degrading organic pollutants. The performance of the catalyst directly determines the oxidation efficiency and economics of the process.

1. The Core Role of the Catalyst

Promoting ozone decomposition: accelerates the conversion of O₃ into ·OH (hydroxyl radical), whose oxidation potential (2.8 V) is far higher than that of ozone (2.07 V), enabling non-selective degradation of the vast majority of organic matter.

Reducing reaction energy consumption: reduces the ozone dosage and shortens the reaction time.

Widening the applicable pH range: some catalysts can work efficiently under neutral or weakly alkaline conditions, making up for the limitation of ozone oxidation alone (which usually performs better under acidic conditions).

2. Key Factors in Catalyst Design

Active site density: the metal valence state (e.g. Mn³⁺) and the oxygen vacancy concentration directly affect the ozone decomposition efficiency.

Stability: resistance to leaching (especially under acidic conditions) and to poisoning (e.g. by Cl⁻ and SO₄²⁻ in wastewater).

Mass transfer efficiency: porous structures or core-shell designs (e.g. TiO₂@CeO₂) optimize the contact between pollutants and active sites.

SINOKLE series ozone catalysts

3. Key Technical Innovations of SINOKLE’s Self-Developed Catalyst

(1) A variety of transition metal oxides (including noble metals) are used as catalytic components; through extensive experiments and engineering verification, the material ratio is adjusted so that the catalyst shows excellent adaptability to different wastewater streams while providing high catalytic activity.

(2) A multi-stage precise temperature-controlled sintering technology is adopted, which effectively reduces production energy consumption and the loss rate of the catalyst during use while preserving the active components, preventing secondary pollution.

(3) A high-activity component material is used as the catalyst carrier: the porous structure provides high specific surface area, and non-leachable catalytic components are doped in to improve stability. The carrier has high mechanical strength and long service life.

(4) The catalyst effectively lowers the reaction activation energy, achieving deep oxidation and maximizing the removal of organic pollutants.

(5) It accelerates the self-decomposition of ozone in water and increases the concentration of ·OH produced in the water, thereby improving the ozone oxidation effect — the oxidation efficiency is 2 to 5 times higher than ozone oxidation alone.

(6) Atomic deposition technology is used to modify the catalyst: the carrier is superhydrophilic, so the catalyst is less prone to contamination, scaling and blockage, and can run for long periods.

4. Partial Catalyst Specifications

5. Application Case: Combined with the Catalyst for a Landfill Leachate Plant

Application at a landfill leachate treatment plant: treatment capacity 300 m³/d; ozone production 8 kg/h; MBR effluent COD ≤1,300 mg/L; CDOF effluent COD ≤400 mg/L, chromaticity ≤30, no odor; biochemical effluent COD ≤20 mg/L, ammonia nitrogen ≤1 mg/L, total phosphorus ≤0.2 mg/L (surface water Class III). The effluent is colorless and odorless, with high removal rate and strong stability; the equipment is not prone to scaling, supports automatic cleaning and easy operation, runs fully enclosed under pressure with zero leakage, and provides a friendly, safe and environmentally sound site environment.