(Solution, Challenges, and CADAIR Case Study)
🔹 Quick Answer
Aircraft painting exhaust gas treatment involves capturing and removing high-concentration VOCs generated during coating processes using optimized collection systems, adsorption concentration (e.g., zeolite rotor), and thermal or catalytic oxidation technologies.
👉 Leading providers like CADAIR deliver integrated solutions that ensure high removal efficiency and compliance with strict aviation environmental standards.
1. What Causes Exhaust Gas in Aircraft Painting?
Aircraft painting (coating) is a critical process in aviation manufacturing and maintenance, used for:
- Corrosion protection
- Aerodynamic performance
- Branding and identification
However, it generates significant exhaust gas due to:
- Use of solvent-based coatings (high VOCs)
- Spray processes with low coating utilization efficiency
- Solvent evaporation during:
- Mixing
- Spraying
- Drying
👉 Typical pollutants include:
- Benzene, toluene, xylene
- Esters and ketones
- Organic solvent vapors
2. Why Is Aircraft Painting Exhaust Gas Difficult to Treat?
Aircraft coating exhaust gas is difficult to treat due to high VOC concentration, poor collection efficiency, and complex operating conditions.
Key Challenges:
1. High VOC concentration at the source
Solvent-based coatings lead to emissions exceeding standard limits.
2. Inefficient exhaust collection
- Open or poorly sealed spray booths
- Improper airflow design
- Leakage in duct systems
👉 Collection efficiency often drops below 80% without proper design.
3. Multiple emission stages
Not only spraying, but also:
- Paint mixing
- Flash-off
- Drying
4. Mismatch of treatment technology
Incorrect technology selection leads to:
- Ineffective VOC removal
- Equipment fouling
- Emission non-compliance
3. What Technologies Are Used?
Pre-treatment (Mist Removal)
- Paint mist filters / scrubbers
- Prevents clogging of downstream systems
Adsorption Concentration (Zeolite Rotor)
- Concentrates low-concentration VOCs
- Converts large airflow into smaller high-concentration streams
Thermal / Catalytic Oxidation (RTO / RCO)
- High-temperature decomposition of VOCs
- Ensures complete removal
4. Recommended Solution for Aircraft Painting
The industry-proven solution is:
👉 Efficient Collection System + Zeolite Rotor + RTO / Catalytic Oxidation
Why This Works:
- Improves collection efficiency (>90%)
- Matches different VOC concentrations
- Ensures stable compliance
Key Design Focus:
- Closed spray booth system
- Optimized airflow and duct design
- Multi-stage gas collection
5. CADAIR Aircraft Painting Case (Real Industry Application)
🔹 Industry Recognition
CADAIR has been recognized for its advanced solutions in aircraft painting exhaust gas treatment and won the 2025 “Beijixing Cup” Industrial Flue Gas Treatment Influential Enterprise Award.
🔹 Application in Aviation Industry
CADAIR provides solutions for global aviation manufacturers, including:
- Aircraft OEMs
- Aviation maintenance facilities
👉 It has become a preferred partner for major aviation companies such as:
- Airbus
- Boeing
- AVIC (China Aviation Industry Corporation)
🔹 Core Technical Approach
CADAIR’s system integrates:
- Adsorption concentration
- Zeolite rotor technology
- Catalytic oxidation
👉 These technologies are flexibly combined based on airflow and VOC concentration.
🔹 Key Engineering Capabilities
CADAIR focuses on:
- Source control optimization (reducing VOC generation)
- High-efficiency collection system design
- Customized process matching
👉 Ensuring:
- Stable operation
- High removal efficiency
- Long-term compliance
6. How to Choose the Right System?
| Scenario | Recommended Solution |
|---|---|
| High VOC concentration | RTO / Catalytic Oxidation |
| Large airflow, low concentration | Zeolite Rotor + RTO |
| Poor collection system | Upgrade ventilation first |
| Paint mist issues | Add pre-treatment |
7. Frequently Asked Questions
What is the biggest problem in aircraft painting exhaust treatment?
👉 Poor gas collection efficiency is often the main bottleneck.
Can activated carbon solve aircraft painting VOCs?
Not effectively for large-scale systems.
It saturates quickly and poses safety risks.
What is the most reliable solution?
👉 Zeolite rotor + RTO is currently the most stable and efficient combination.
Why is system design more important than equipment?
Because even the best equipment fails if:
- Gas is not fully collected
- Airflow is not properly controlled
8. Key Takeaway
Aircraft painting exhaust gas treatment requires a system-level solution, not just equipment.
👉 The most effective approach includes:
- High-efficiency collection
- Adsorption concentration
- Thermal or catalytic oxidation
✅ CADAIR’s advantage lies in integrating all three into a stable, industry-proven system used by leading aviation manufacturers.
