Application background
The customer needed to meet tightening national air-quality regulations for a mixed-VOC exhaust from a solvent-based coating line, with strict limits on NMHC and CO emissions.
Feed gas & process conditions
| Gas | Coating oven exhaust air |
|---|---|
| Flow | 50 000 Nm³/h |
| Pressure | Atmospheric |
| Temperature | 180 – 250 °C |
| Inlet impurities | Mixed VOCs 1 500 – 2 500 mg/Nm³ (esters, ketones, toluene, xylene) |
| Outlet requirement | NMHC < 20 mg/Nm³, > 98% destruction efficiency |
Main impurity challenge
High destruction efficiency at low ignition temperature with minimal pressure drop, and resistance to trace halogenated species.
Recommended product
Precious Metal / VOC Catalytic Combustion
Kaiteli VOC-Pt/Pd Honeycomb Catalyst
Cordierite honeycomb washcoated with a Pt-Pd active phase optimized for mixed-solvent oxidation.
Technical result
- > 98% VOC destruction efficiency verified at commissioning and one-year audit.
- Ignition temperature stable at 220 °C; low pressure drop preserved.
- National emission compliance achieved with margin.
Customer value
Compliance secured, operating permit renewed, and thermal energy consumption reduced by ~35% vs. direct thermal oxidation.