Ultraviolet Photocatalytic Oxidation (UVPCO)
PCO Filtration – Photo Catalytic Oxidation is an advanced process by which volatile organic compounds (VOCs), bacteria, viruses, molds and fungus are destroyed by incorporating photon and ultraviolet (UV) energy activating a catalyst thereby creating the photo catalytic oxidation (PCO) process. UV-PCO often utilizes a honeycomb configured reactor coated with titanium dioxide (TiO2 or Titania) which acts as a photo-oxidative catalyst.
This design has high conversion rates with low pressure drop making it suitable for use in building HVAC systems. This can be used in AHU provided that the sufficient space is available in any side of the cooling coil. The coated screen is irradiated with UV-C light. Air containing organic pollutants flows through the screen, where the VOCs adsorb on the catalyst.
The UV light interacting with the catalyst in the presence of oxygen and water vapor, produces hydroxyl radicals. Hydroxyl radicals are highly chemically reactive and, in-turn, breakdown the adsorbed VOCs and inactivate Pathogens, ideally producing only carbon dioxide and water as bye products.
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