From 2,000 ppm to <1 ppm: A Customized H2O2 Catalyst Solution
Sterilization with Vaporized Hydrogen Peroxide (VHP) has become a standard process in pharmaceutical cleanrooms, isolators and bio-decontamination systems. However, safely removing residual H₂O₂ before exhaust discharge remains a key engineering challenge, especially under high airflow, high humidity and strict emission requirements.
Recently, our engineering team worked with a French customer on a pharmaceutical VHP biodecontamination project, providing a customized honeycomb catalyst solution for efficient hydrogen peroxide decomposition.
Project Challenges
The customer required a catalyst capable of treating VHP exhaust under the following conditions:
Application: Pharmaceutical VHP biodecontamination system
Gas: Air containing 1,000–2,000 ppm H2O2
Airflow: 12,000 m³/h
Temperature: 18–25°C
Relative Humidity: Nearly 100%
Target Outlet Concentration: <1 ppm H2O2
In addition to catalytic efficiency, the customer also focused on:
- Low pressure drop
- Long service life
- Honeycomb ceramic structure
- Custom dimensions for equipment integration
Our Customized Solution
After evaluating the operating conditions, we recommended our Pd/Pt noble metal honeycomb H2O2 decomposition catalyst.
Recommended catalyst features:
Honeycomb ceramic substrate
Pd & Pt noble metal catalyst
Room-temperature operation
Converts H₂O₂ → H₂O + O₂
Excellent performance under high humidity
Low airflow resistance
Suitable for pharmaceutical cleanroom applications
To help balance performance and project budget, we proposed two catalyst loadings:
800 g/m³ Pd & Pt — recommended for maximum catalytic efficiency and longer service life.
400 g/m³ Pd & Pt — cost-effective alternative for project evaluation.
Engineering Support Beyond Product Supply
Rather than simply quoting a catalyst, our engineers assisted the customer with catalyst sizing and reactor design.
Using the customer's operating data:
Airflow: 12,000 m³/h
Recommended GHSV: 10,000 h⁻¹
We calculated:
Required catalyst volume
Recommended catalyst quantity
Catalyst arrangement
Future pressure drop estimation based on housing dimensions
After further technical discussions, the customer preferred a larger customized catalyst:
150 × 150 × 150 mm
400 cpsi honeycomb ceramic
Our engineering team immediately optimized the proposal and recommended 356 customized honeycomb catalyst blocks, reducing installation complexity while maintaining the required catalytic performance.
Expected Performance
- H₂O₂ removal efficiency suitable for reducing 1,000–2,000 ppm to below 1 ppm
- Room-temperature catalytic decomposition
- Low pressure drop
- High humidity resistance
- Estimated service life of approximately 2 years under the customer's operating conditions
- Custom sizes and cell densities available
Why Honeycomb Catalysts for VHP Applications?
Compared with granular catalysts, honeycomb catalysts provide:
Lower pressure drop
Higher gas distribution uniformity
Easier installation
Better mechanical strength
Flexible customization (size, cpsi, noble metal loading)
Ideal for pharmaceutical, biotechnology and cleanroom air treatment systems
As VHP sterilization continues to expand worldwide, customized honeycomb H₂O₂ decomposition catalysts are becoming an increasingly important component in ensuring both environmental compliance and operator safety.
If you are designing or upgrading a VHP sterilization, bio-decontamination, or pharmaceutical exhaust treatment system, we'd be happy to discuss a tailored catalyst solution for your application.
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