VOC oxidation & air sterilisation with the power of UV light !

1. Photo-Catalysis: Oxidation Process description

Photo-Catalysis consists in degrading organic contaminants on TiO₂ coated surface activated with photons produced by short UV waves (UV-C) at room temperature. Once activated, the TiO2 coated surface contains electron-hole-pairs. Once an oxygen and a carbon containing molecule adsorb on such an electron-hole-pair, they become chemi-adsorbed on the surface and activated. In such an unstable state, the 2 activated and side-by-side molecules can only react with each other and water and CO₂ molecules desorb from the surface.

2. Photo-Catalysis: Process description

The combination of the photo-oxidation and photo-catalysis processes allows the system to be very compact. Consequently, this system has been called “Phoenix Compact”.

As for the photo-oxidation process, a catalyst module, situated after the photo-catalysis module, helps to complete the oxidation process and to convert the un-reacted ozone and oxygen radicals in O₂.

3. Applications

• Abatement of small organic molecules, like formaldehyde, acetaldehyde, methanol, formate, methylmercaptan… which weakly adsorb on the catalyst of a photo-oxidation process; they all require a short reaction sequence to be fully oxidized.
• Final oxidation step of a standard photo-oxidation system

4. Advantages

• Degradation at room temperature
• Low investment (carbon steel), energy (lamp, fan) and maintenance costs
• Long equipment life time
• Compact, modular and silent system; indoor and outdoor location possible
• No start-up time; no fluid supply and waste production

5. Dimensioning

• Each duct has a section of 1m x 1m and a maximum flow capacity of 8000 m³/h
• For higher flow, the number of ducts = flow/8000
• For flows smaller than 3000m3/h, a section of 700 x 700mm is preferred