Preparation Process and Support Selection for Ozone Decomposition Catalysts?

A company specializing in the R&D and production of a series of environmentally friendly catalytic materials, including ozone decomposition catalysts, carbon monoxide catalysts, hopalat agents, manganese dioxide, copper oxide, VOC catalysts, and hydrogen peroxide catalysts, is compiling information to provide highly adaptable catalytic material solutions for various environmental governance scenarios. We hope this information will be helpful.

Our main customer base includes: industrial waste gas treatment companies, ozone purification equipment manufacturers, environmental protection companies in the automotive, shipbuilding, exhaust gas treatment, petrochemical, and chemical industries, coating, printing, VOCs treatment, municipal and industrial wastewater treatment companies, flue gas treatment companies in the metallurgical and thermal power industries, laboratory and confined space air purification equipment manufacturers, and environmental engineering EPC and O&M companies.

In industrial production, the activity, stability, and lifespan of ozone decomposition catalysts depend primarily on the precise control of the preparation process and the scientific selection of the carrier. Non-standard processes and mismatches between the carrier and operating conditions can easily lead to rapid catalyst activity decay, uncontrolled loading, and poor actual performance. This is a core pain point in chemical and environmental protection applications.

Impregnation is the mainstream process for the industrial preparation of ozone decomposition catalysts, suitable for large-scale mass production and a core process choice to ensure catalyst activity and stability.

The practical operation of this process hinges on three key control points:
First, the support undergoes high-temperature calcination pretreatment at 400-600℃ to remove impurities and increase surface hydroxyl groups, enhancing the chemical bonding between the active component and the support;
Second, an equal-volume vacuum impregnation method is used to precisely control the loading of the active component, avoiding surface enrichment and subsequent detachment, ensuring uniform filling of the component into the support pores;
Finally, precise calcination at 380-450℃ directionally generates highly active crystalline phases such as δ-MnO₂ and γ-MnO₂, ensuring the ozone decomposition efficiency of the catalyst at room temperature. The entire process can achieve an active component loading error within ±0.2%, meeting the quality requirements of continuous industrial production.

As the foundation of ozone decomposition catalysts, the selection of the carrier must adhere to three principles: adaptability to operating conditions, high mechanical strength, and strong adhesion. General-purpose carriers should be rejected; selection must be tailored to the specific application scenario.

Cordierite honeycomb carriers are the preferred choice for high-volume applications such as waste gas treatment and corona treatment. Their mechanical strength ≥10MPa and strong resistance to airflow erosion make them suitable for high-space-velocity ozone exhaust gas treatment scenarios. γ-Al₂O₃ particulate carriers are more suitable for ozone catalysis in wastewater treatment. Their large specific surface area allows for uniform loading of active components, increasing the contact area for the catalytic reaction. Regardless of the carrier type, coating modification treatment is necessary to strengthen the bond with active components, reduce active component detachment at the source, and extend catalyst lifespan.

In practical industrial applications, honeycomb ozone decomposition catalysts prepared using the impregnation method and fabricated on cordierite honeycomb carriers have been widely used in ozone tail gas treatment in the corona treatment industry. They achieve a decomposition efficiency of ≥99% for low to medium concentrations of ozone at room temperature, and even under high humidity conditions (RH 90%), the activity retention rate remains ≥85%, allowing for long-term stable operation and meeting the needs of continuous production in chemical enterprises. Meanwhile, ozone catalysts on γ-Al₂O₃ particulate carriers can also achieve efficient ozone decomposition in the tail gas control of ozone oxidation treatment of industrial wastewater, meeting environmental emission requirements.

There is no universal solution for the preparation and application of ozone decomposition catalysts. Only by combining precise control of the preparation process with accurate adaptation of the carrier to the operating conditions can the actual application effect be guaranteed. In industrial practice, it is necessary to optimize the impregnation process parameters and scientifically select the carrier type based on core parameters such as ozone concentration, operating humidity, space velocity, and application scenario to allow the catalyst to perform at its best and provide stable support for ozone control in the chemical and environmental protection fields.

author:Hazel
date:2026-03-17