Overview
Ceramsite-based ozone catalyst is a composite material combining porous ceramsite (a lightweight, high-strength ceramic aggregate) with active metal oxides (e.g., MnO2, CuO, or rare earth elements). Designed to accelerate ozone decomposition into hydroxyl radicals (•OH), it significantly improves oxidation efficiency in environmental remediation processes. The catalyst’s structure leverages ceramsite’s inherent advantages: a honeycomb-like pore network provides ample surface area (typically 50–200 m²/g) for reactant contact, while the ceramic matrix ensures mechanical durability under turbulent flow conditions. It outperforms traditional alumina or activated carbon carriers in acidic or high-temperature environments.
Physical and Chemical Properties
The catalyst exhibits a bulk density of 0.8–1.2 g/cm³, with particle sizes ranging from 3–8 mm for fixed-bed reactors. Its open porosity (≥40%) minimizes pressure drop in treatment systems. The active components are typically loaded at 5–15% wt., optimized for ozone conversion rates of 80–95% under standard conditions (20°C, 1 atm). Chemically, it resists pH fluctuations (stable in pH 2–11) and common poisoning agents like sulfides or phosphates. Accelerated aging tests show less than 10% activity loss after 5,000 hours in municipal wastewater applications. Thermal stability up to 1,000°C allows periodic thermal regeneration.
Main Applications
In wastewater treatment, the catalyst enables cost-effective degradation of refractory organics (e.g., pharmaceuticals, dyes) by enhancing ozone’s oxidation potential. Industrial users report 30–70% reductions in ozone dosage compared to non-catalytic systems. It’s also deployed in drinking water plants for micropollutant (e.g., pesticides) removal and disinfection byproduct control. Emerging applications include flue gas treatment (e.g., NOx/SO2 oxidation) and swimming pool water purification. In VOC abatement, catalytic ozonation systems achieve 90+% destruction efficiency for benzene-series compounds at 50–100°C, outperforming thermal oxidation in energy consumption.
Safety and Storage
As an inorganic solid, the catalyst poses minimal acute hazards. However, dust generation during loading/unloading necessitates NIOSH-approved N95 masks. Spent catalysts may concentrate heavy metals (depending on feedwater), requiring evaluation under local hazardous waste regulations. Storage recommendations include sealed moisture-proof packaging (25 kg woven bags with PE liners) and palletized stacking ≤2 meters high. Prolonged exposure to humidity (>80% RH) may reduce initial activity by 5–10%. Freeze-thaw cycles do not affect structural integrity due to ceramsite’s low water absorption (<5%).
B2B Procurement Guide
Key specifications to verify include: catalytic activity (measured in g-O3 consumed per g-catalyst per hour), abrasion resistance (<1% weight loss after 24h tumbler test), and contaminant tolerance (e.g., oil/fat resistance for food industry wastewater). Require suppliers to provide third-party test reports using standard methods like HJ/T 354-2019 (China’s ozone catalyst evaluation protocol). For large-scale projects (≥10 tons), negotiate bulk discounts and confirm lead times (typically 4–8 weeks for customized formulations). Consider FOB pricing from manufacturers in Shandong or Jiangsu provinces, where 60% of China’s production capacity is concentrated. Pilot testing with actual wastewater is strongly advised—reputable suppliers offer free 50–100 kg samples for evaluation.
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