Why Does Catalyst Poisoning Cause Rapid Decay of Ozone Decomposition Catalysts?

A company specializing in the research and development and production of a series of environmentally friendly catalytic materials, including ozone decomposition catalysts, carbon monoxide catalysts, hogallat 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, hoping to be helpful to everyone.

Our main clientele includes: industrial waste gas treatment companies, ozone purification equipment manufacturers, environmental protection companies in the motor vehicle, 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 enclosed space air purification equipment manufacturers, and environmental engineering general contracting and operation and maintenance companies.

In industrial scenarios such as chemical, water treatment, and exhaust gas treatment, the rapid degradation of ozone decomposition catalysts is a frequent pain point in the industry. Catalyst poisoning is the core and main cause of this problem. The resulting sharp drop in catalytic efficiency is often irreversible, directly shortening the catalyst's lifespan and significantly increasing the company's procurement and operation and maintenance costs.

I. The Core Principle of Ozone Decomposition Catalyst

 Degradation Due to Catalyst Poisoning Industrial-grade ozone decomposition catalysts use manganese dioxide and copper oxide as core active components. The key to their catalytic decomposition of ozone lies in the active sites on the surface. Ozone molecules complete the decomposition reaction by adsorbing onto the active sites. When poisoning occurs, toxic substances firmly occupy the active sites and cannot desorb. They also alter the valence state of active metals such as manganese and copper, directly resulting in the loss of catalytic activity. Some toxic substances can also clog catalyst pores, preventing ozone molecules from contacting the internal active sites, ultimately leading to a precipitous drop in catalytic efficiency, manifested as rapid catalyst degradation.

II. Common Toxic Substances in Ozone Decomposition Catalysts 

in Industrial Scenarios Various impurities in industrial environments can poison ozone decomposition catalysts. In order of toxicity, the most significant toxicity comes from sulfides (H₂S, SO₂), which are highly poisonous to ozone catalysts; even trace amounts can cause rapid poisoning. Next are halogens/chlorine-containing substances (HCl, Cl₂), heavy metals such as arsenic, lead, and mercury. Furthermore, high-boiling-point VOCs, carbon deposits from industrial oil pollution, and salt crystals precipitated under high humidity conditions can also gradually poison the catalyst, leading to degradation.

III. Practical Application Case of Ozone Decomposition Catalyst Poisoning 

A water treatment company, in its ozone oxidation tailwater quality control, used a conventional ozone decomposition catalyst. Due to the presence of trace amounts of sulfides in the tailwater and the lack of pretreatment, the catalyst's ozone decomposition efficiency plummeted from 98% to 45% after only one month of use, exhibiting severe degradation. After optimizing the pretreatment process for sulfides and replacing it with a more toxic manganese dioxide-copper oxide-based ozone decomposition catalyst, the catalytic efficiency stabilized above 95% and showed no significant degradation even after two years of continuous use, greatly reducing the frequency of catalyst replacement.

IV. Targeted Solutions for Ozone Decomposition Catalyst Poisoning

To avoid rapid degradation caused by catalyst poisoning, the key lies in adapting to operating conditions + pretreatment + selecting high-quality catalysts: First, pretreatment of industrial waste gas/wastewater is crucial to remove toxic impurities such as sulfides, halogens, and oil. Second, based on actual operating conditions, industrial ozone decomposition catalysts with high-purity manganese dioxide and copper oxide as active components should be selected. These catalysts have a more rational pore structure and stronger resistance to poisoning and stability. Simultaneously, a professional technical team should customize a catalytic application plan based on operating parameters, regularly monitor catalyst performance, and perform timely maintenance.

In industrial ozone control, selecting ozone decomposition catalysts with excellent resistance to poisoning, coupled with a scientifically adapted operating condition plan, is key to avoiding rapid catalyst degradation and ensuring catalytic efficiency. High-quality industrial ozone decomposition catalysts can be adapted to complex operating conditions in multiple industries such as chemical engineering, water treatment, and corona treatment, reducing poisoning problems at the source and achieving cost reduction and efficiency improvement.

Author: Hazel
Date: 2026-03-24