Catalytic oxidizers (CO) utilize highly efficient catalysts to completely oxidize volatile organic compounds (VOCs) into harmless CO₂ and H₂O at low temperatures of 250–400°C, avoiding the high energy consumption and NOₓ generation problems of traditional high-temperature incineration. As a key technology for industrial waste gas treatment, CO is particularly suitable for scenarios involving low to medium concentrations of organic waste gas with clearly defined components and high cleanliness.
The Ever-power CO system employs customized anti-poisoning catalysts, intelligent temperature control logic, and a compact design, ensuring a removal efficiency of ≥98% while significantly reducing fuel consumption and operation and maintenance costs. It requires no heat storage structure, resulting in lower investment and faster deployment—providing a cost-effective and highly reliable green solution for industries such as pharmaceuticals, electronics, and printing.
A Catalytic Oxidizer (CO) is an air pollution control device that uses a catalyst to oxidize volatile organic compounds (VOCs) and hazardous air pollutants (HAPs) into carbon dioxide (CO₂) and water (H₂O) at lower temperatures. Compared to traditional thermal combustion, CO achieves high purification efficiency without the need for high temperatures, making it an ideal solution for medium-to-low concentration, clean organic emissions.
Key Mechanism: The catalyst lowers the activation energy required for VOC oxidation, allowing the reaction to proceed rapidly at temperatures far below the auto-ignition point (typically 600–800°C).
VOC-containing exhaust gas first enters a heat exchanger, where the residual heat of the purified high-temperature gas preheats it to the catalyst ignition temperature (typically 250–400°C).
The preheated exhaust gas enters the catalytic bed, where a low-temperature oxidation reaction occurs on the catalyst surface (e.g., Pt/Pd), efficiently decomposing VOCs into CO₂ and H₂O.
The oxidation reaction is exothermic, releasing a large amount of heat, significantly increasing the outlet gas temperature (typically higher than the inlet temperature).
The high-temperature purified gas passes through the heat exchanger again, transferring heat to the incoming cold exhaust gas, achieving thermal energy recycling and significantly reducing external fuel consumption.
For a typical VOC like acetone (C₃H₆O):
C₃H₆O + 4O₂ → 3CO₂ + 3H₂O + Heat
General reaction equation:
VOC + O₂ → CO₂ + H₂O + Thermal Energy
| Feature | CO (Catalytic Oxidizer) | RTO (Regenerative Thermal Oxidizer) | RCO (Regenerative Catalytic Oxidizer) |
|---|---|---|---|
| Operating Temperature | 250–400°C | 760–850°C | 250–400°C |
| Energy Consumption | Low (no regenerators, but continuous heating needed) | High (can be self-sustaining at high concentrations) | Very low (regeneration + catalysis, often self-sustaining) |
| NOₓ Generation | Nearly zero | Possible (due to high temperatures) | Nearly zero |
| Footprint | Small (simple structure) | Large (multi-chamber/rotary design) | Moderate |
| Capital Cost | Lower | Higher | Moderate to higher |
| Applicable Emissions | Clean, non-toxic, medium-to-low concentration VOCs | Various VOCs (tolerant to dirt) | Clean, non-toxic, medium-to-low concentration VOCs |
| Catalyst/Materials | Requires catalyst (may deactivate) | No catalyst | Requires catalyst + regenerators |
| Startup Speed | Fast (low thermal inertia) | Slow (requires preheating regenerators) | Moderate |
⚠️ Note: CO requires high intake air cleanliness and is not suitable for exhaust gases containing halogens, sulfur, silicon, dust, or oil mist. For complex exhaust gases, it is recommended to use a pretreatment system or select RTO/RCO.
Significant energy savings, avoiding high-temperature safety hazards
Up to 95–99% for applicable VOCs
Flexible installation, suitable for space-constrained scenarios
Strong environmental compliance
Suitable for intermittent production conditions
| Gas Category | Typical Representative Substances | Suitable for CO | Common Application Industries | Typical Processes/Scenarios |
|---|---|---|---|---|
| Alcohols | Methanol, Ethanol, Isopropyl Alcohol (IPA) | ✅ Yes | Pharmaceuticals, Electronics, Cosmetics, Food | Reaction solvents, Cleaning, Extraction, Drying |
| Ketones | Acetone, Methyl Ethyl Ketone (MEK), Cyclohexanone | ✅ Yes | Electronics Manufacturing, Pharmaceuticals, Coatings | Photoresist cleaning, Synthesis reactions, Degreasing |
| Esters | Ethyl Acetate, Butyl Acetate, Isopropyl Acetate | ✅ Yes | Printing, Packaging, Furniture Coating, Adhesives | Flexographic/Gravure printing, Laminating, Varnishing |
| Aromatic Hydrocarbons | Toluene, Xylene, Ethylbenzene | ✅ Yes (Concentration assessment needed) | Paints, Inks, Chemicals, Automotive Parts | Spraying, Drying, Resin synthesis |
| Alkanes/Olefins | n-Hexane, Cyclohexane, Heptane | ✅ Yes | Electronics, Pharmaceuticals, Precision Cleaning | Cleaning agents, Extraction solvents |
| Ethers | Tetrahydrofuran (THF), Ethylene Glycol Monomethyl Ether | ✅ Yes (Polymerization prevention needed) | Pharmaceuticals, Lithium Batteries, Fine Chemicals | Polymerization reactions, NMP alternative solvents |
| Aldehydes | Formaldehyde, Acetaldehyde | ⚠️ Conditionally suitable | Resin manufacturing, Textiles, Food processing | Concentration control required to avoid catalyst fouling |
| Organic Acids | Acetic Acid, Propionic Acid | ⚠️ Conditionally suitable | Food flavors, Pharmaceuticals | Feasible at low concentrations; high concentrations may corrode or affect catalyst performance |
| Some Amines | Triethylamine, Dimethylamine | ⚠️ Evaluate with caution | Pharmaceuticals, Pesticides | Prone to generating ammonia or nitrogen oxides; custom catalysts required |
❌ Not Suitable or High-Risk Gases (Generally not suitable for direct use in CO; pre-treatment or RTO is recommended):
- Halogenated Compounds: Chlorobenzene, Dichloromethane, Freon (Generate corrosive acids, poison catalyst)
- Sulfur Compounds: H₂S, Mercaptans, SO₂ (Cause permanent deactivation of catalyst)
- Siloxanes/Silicones: From defoamers, sealants (Generate silica at high temperatures, clog catalyst beds)
- Phosphorus Compounds, Heavy Metal Vapors: Catalyst poisons
- High Concentrations of Particulates, Oil Mist, Tar: Physical blockage of catalyst bed
✅ Prerequisites: The exhaust gas must be clean, dry, free from catalyst poisons, with VOC concentrations typically within the range of 200–3,000 mg/m³.
SemiCore is a mid-sized manufacturer specializing in advanced chip packaging (such as Fan-Out WLP and SiP). Its cleaning processes heavily utilize isopropanol (IPA) and acetone as photoresist removers. With the implementation of the 2023 amendment to South Korea’s Atmospheric Environment Protection Act, VOC emission limits have been tightened to ≤50 mg/m³. Existing activated carbon adsorption systems are no longer sufficient to meet these standards and suffer from high hazardous waste disposal costs and frequent replacements.
The client learned about Ever-power’s numerous successful VOC treatment cases in the electronics industry through LinkedIn technical articles and proactively contacted our Korean distributor. After initial technical discussions, it was confirmed that their exhaust gas was fully compatible with CO technology, and the client subsequently invited the Ever-power engineering team to conduct an on-site survey.
Equipment Model: EP-CO-5000 (Airflow Capacity: 5,000 Nm³/h)
Core Technology Configuration:
Dual-channel plate heat exchanger (heat recovery efficiency ≥92%)
Moisture-resistant Pt/Pd catalyst (optimized for high humidity IPA/acetone)
Electric heating assistance + LEL safety interlock (explosion-proof rating ATEX Zone 2)
Skirt-mounted design (overall dimensions 2.8m × 3.5m × 2.6m, meeting site limitations)
PLC automatic control + remote monitoring platform (supports Korean interface)
Delivery Time: 10 weeks (including sea freight and customs clearance)
| Metric | Before Retrofit (Activated Carbon) | After Retrofit (Ever-power CO) |
|---|---|---|
| VOC Destruction Efficiency | ~85% (highly variable) | ≥98.5% (verified by third-party testing) |
| Emission Concentration | 120–200 mg/m³ | <30 mg/m³ (consistently compliant) |
| Energy Consumption | No direct energy use, but high hazardous waste disposal costs | 55% lower fuel consumption vs. RTO |
| Operating & Maintenance Cost | Activated carbon replacement monthly (~$8,000/month) | Annual catalyst maintenance < $3,000 |
| Footprint | Occupied space for two adsorption towers | 40% less space required |
“Ever-power’s CO system not only helped us pass Korea’s Ministry of Environment compliance inspection on the first attempt, but also significantly reduced our operational burden. The remote diagnostics feature allows us to monitor equipment status even outside working hours—truly ‘install and forget.’
— Kim Min-jae
EHS Manager, SemiCore Co., Ltd.