Photocatalytic oxidation air purification system

A photocatalytic coating oxidizes volatile organic compounds that adsorb onto the coating into water, carbon dioxide, and other substances. When photons of the ultraviolet light are absorbed by the coating, reactive hydroxyl radicals are formed. When a contaminant is adsorbed onto the coating, the h...

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Bibliographic Details
Main Authors STEPHEN O. HAY, TIMOTHY N. OBEE
Format Patent
LanguageEnglish
Published 07.04.2005
Subjects
CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
DISINFECTION, STERILISATION, OR DEODORISATION OF AIR
HUMAN NECESSITIES
HYGIENE
MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES
MEDICAL OR VETERINARY SCIENCE
METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:A photocatalytic coating oxidizes volatile organic compounds that adsorb onto the coating into water, carbon dioxide, and other substances. When photons of the ultraviolet light are absorbed by the coating, reactive hydroxyl radicals are formed. When a contaminant is adsorbed onto the coating, the hydroxyl radical oxidizes the contaminant to produce water, carbon dioxide, and other substances. Humidity has an effect on the photocatalytic performance of the titanium dioxide coating. Water adsorbs strongly on the coating, and water and contaminants compete for adsorption sites on the coating. A magnetron emits microwaves of the desired wavelength. The microwaves are only absorbed by the adsorbed water, desorbing the water from the photocatalytic coating and creating additional photooxidation sites for the contaminants.
Bibliography:Application Number: AU20040275708