Analysis of Hogalat's Catalyst Gas Processing Capacity Technology: Carbon Monoxide, Ozone, and VOCs

Hopcalite (a copper-manganese oxide composite catalyst) primarily treats three types of gases: carbon monoxide (CO), ozone (O3), and some volatile organic compounds (VOCs). Its room-temperature catalytic oxidation of carbon monoxide is the most mature application, achieving a single-pass conversion rate of over 99%. Ozone decomposition can be completed without external energy input. It also exhibits catalytic activity against certain VOCs (such as formaldehyde, toluene, and ethylene oxide). The use of this catalyst is significantly limited by environmental humidity, gas concentration, and the presence of toxic substances such as sulfur and phosphorus; it requires dry, low-sulfur conditions to achieve optimal performance.

I. Carbon Monoxide – The Core Target

The catalytic oxidation of carbon monoxide is Hopcalite's most mature application. At room temperature (0–40°C), this catalyst can efficiently convert highly toxic carbon monoxide into harmless carbon dioxide, with the reaction: 2CO + O2 → 2CO2. The catalytic mechanism relies on oxygen vacancies (sites lacking oxygen atoms on the crystal surface) in the copper-manganese oxide lattice and the reversible redox cycle between Cu2+/Cu+ and Mn4+/Mn3+, significantly reducing the activation energy of the CO-O2 reaction. Under dry and clean inlet conditions (relative humidity <10%), the CO conversion rate of a single pass through the hogallat bed can typically reach over 99%. This characteristic makes it a key purification material in safety protection equipment such as gas masks, mine self-rescue devices, and fire escape masks.

II. Ozone – Typical Application of Room Temperature Decomposition

Hogallat also possesses excellent ozone decomposition capabilities. Ozone (O3) is a strong oxidant, often generating excess ozone tail gas in industrial water treatment, printing, and disinfection processes. Hogallat can rapidly decompose ozone into oxygen (2O3 → 3O2) at room temperature, without heating or UV assistance, and without producing secondary pollutants. Its decomposition mechanism is similar to CO oxidation: ozone molecules adsorb onto oxygen vacancies on the catalyst surface and then rapidly decompose through electron transfer. Compared to physical adsorption materials like activated carbon, horgalat's ozone decomposition is a chemical catalytic process, eliminating adsorption saturation issues and resulting in a longer lifespan. This capability is applied in ozone suppression devices for water treatment systems, post-purification of ultraviolet disinfection equipment, and in museums, libraries, and other locations requiring trace ozone removal to protect cultural relics.

III. Volatile Organic Compounds (VOCs) – Expanding Treatment Capacity

In addition to carbon monoxide and ozone, horgalat also exhibits catalytic oxidation activity for some volatile organic compounds. Studies have shown that this catalyst can be used to treat VOCs such as formaldehyde (HCHO), ethylene oxide (C2H4O), and toluene (C7H8), ultimately oxidizing them to carbon dioxide and water. The reaction pathway involves the adsorption of VOC molecules on the surface of copper-manganese oxides, the breaking of C-H or C-O bonds, and the deep oxidation of intermediate products. It is important to note that horgalat's catalytic efficiency for VOCs is generally lower than its efficiency for CO, and the reactivity varies significantly among different VOCs. In practical applications, hogallat is more suitable for treating industrial exhaust gases that coexist with CO (such as coking and petrochemical industry waste gases), achieving synergistic treatment of multiple pollutants, rather than being used as a dedicated VOCs catalyst.

IV. Typical Industrial Application Scenarios

Based on the above gas treatment capabilities, hogallat has achieved mature applications in the following scenarios:

1. Personal Safety Protection: Filled into gas mask filter canisters, mine self-rescue devices, and fire escape masks for respiratory protection against CO in accidents such as fires and mine disasters.

2. Enclosed Space Air Purification: Used in mine refuge chambers, submarines, space stations, and air separation systems (air separation equipment) to continuously remove trace amounts of CO generated by personnel respiration or equipment operation.

3. Industrial Exhaust Gas Treatment: Filled into fixed-bed reactors to treat low-concentration CO and some VOCs exhaust gases emitted from industries such as steel, coking, chemical, and thermal power generation, ensuring they meet emission standards.

4. Water Treatment and Ozone Exhaust Gas Destruction: Used in ozone contact tank exhaust gas destruction devices in waterworks and sewage treatment plants to decompose emitted ozone into oxygen.

5. Special Equipment Support: Used as an auxiliary catalytic module in diesel engine exhaust gas treatment, hydrogen gas purification in fuel cell systems, and other scenarios.

V. Key Limitations of Using Hogalat

In practical engineering applications, the performance of Hogalat is strictly limited by the following factors:

Humidity Limitation: Water vapor is the most sensitive inhibitor of Hogalat. Water molecules compete with CO or ozone for active sites on the catalyst surface, leading to a sharp decline in catalytic efficiency. When the relative humidity exceeds 10%~15%, the activity decay is significant; when the humidity exceeds 45% and exposure is prolonged, the catalyst may undergo irreversible deactivation due to capillary condensation. Therefore, in industrial plants, a silica gel or molecular sieve desiccant layer is usually placed before the Hogalat bed to lower the inlet dew point to below -20℃.

Concentration Range Limitation: Hogalat is mainly suitable for the purification of low concentrations of harmful gases. For carbon monoxide, the concentration for a single treatment should generally not exceed 50,000 ppm (5% by volume). Excessive concentration can lead to exothermic reactions that cause bed runaway (a sudden increase in localized temperature), damaging the catalyst structure. Similarly, for ozone and VOCs, a treatment concentration below 1% (by volume) is recommended.

Poisoning Substance Restrictions: Sulfides (such as hydrogen sulfide H2S, sulfur dioxide SO2), phosphides, and olefins (such as ethylene and propylene) can chemically react with or strongly adsorb onto the active components of the hogallat catalyst, leading to permanent poisoning of the active sites. The feed gas should ensure that the content of these substances is below the ppm level.

Mechanical Strength and Dust: Hogallat catalysts are often used in columnar, granular, or honeycomb form, and may pulverize under airflow impact. The fine powder from pulverization can clog bed channels and increase pressure drop; therefore, dust filters must be installed upstream and downstream of the catalyst bed.

Summary

In summary, the core gases that the hogallat catalyst can treat are carbon monoxide, ozone, and some volatile organic compounds. Its efficient room-temperature oxidation of carbon monoxide is an irreplaceable technical solution in the field of safety protection; its energy-free decomposition of ozone provides a reliable means for water treatment and air purification; and its limited activity against VOCs gives it certain synergistic value in the treatment of multi-component industrial exhaust gases. In practical use, it is essential to strictly control the inlet air humidity (preferably below 10%) and avoid high-concentration impacts and the entry of toxic substances such as sulfur/phosphorus into the bed to ensure the long-term stable performance of horgalacturethane's catalytic properties. Technicians can comprehensively evaluate whether horgalacturethane is suitable for their specific process requirements based on the type, concentration, and operating conditions of the target gas.

Author: Gloria
Date: 2026-04-23