Missouri Patent of the Month – May 2021

Microbial disinfection is the key way to deal with mold, mildew, and pathogenic microbes. A common method is to purify air and surfaces with Reactive Oxygen Species (ROS) including hydroxyl, hydroperoxyl, and chlorine products. ROS refers to the activated air that results from exposure of ambient humid air to UV light. Attempts to use hydrogen peroxide in a gaseous form have been limited by the technical difficulty of producing Purified Hydrogen Peroxide Gas (PHPG). Synexis has developed a system to effectively produce a non-hydrated PHPG.

The device developed by Synexis can be incorporated into an existing HVAC system. An air distributor provides airflow across an air-permeable substrate with a catalytic coating. The catalytic substrate is prepared by dipping the material into a slurry of TiO2 and water and allowed to air dry. As the humid airflow passes over the substrate it is exposed to a UV light. The UV light causes a photocatalysis which converts hydrogen peroxide into PHPG. This produces a steady level of PHPG which is non-hydrated and free of ozone. This helps to improve its disinfection capabilities.

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