Purified Hydrogen Peroxide Gas Generation Methods and Devices

Abstract

The present disclosure provides for and includes improved devices and methods for the production of Purified Hydrogen Peroxide Gas (PHPG) that is substantially non-hydrated and substantially free of ozone.

1 . A device for producing non-hydrated purified hydrogen peroxide gas (PHPG) comprising:
 a. an enclosure;   b. an air distribution mechanism providing an airflow;   c. an air-permeable substrate structure having a catalyst on its surface and configured to produce non-hydrated purified hydrogen peroxide gas when exposed to a light source and provided an airflow;   d. a source of ultraviolet light comprising a wavelength between 190 nm and 460 nanometers (nm); and   wherein   said airflow is through said air-permeable substrate structure; and   said device produces PHPG that is free of ozone and directs it out of said enclosure when in operation.   
     
     
         2 . The device of  claim 1 , wherein said enclosure and said air distribution system providing an airflow are provided by a heating, ventilating, and air conditioning (HVAC) system wherein air flows from the HVAC system through said air-permeable substrate structure and said device produces PHPG and directs it into a heated, ventilated and air conditioned space. 
     
     
         3 . The device of  claim 1 , wherein said enclosure and said air distribution system providing an airflow are provided by a heating, ventilating, and air conditioning (HVAC) system. 
     
     
         4 . (canceled) 
     
     
         5 . (canceled) 
     
     
         6 . (canceled) 
     
     
         7 . The device of  claim 1 , wherein said airflow comprises air having a humidity of at least 5%. 
     
     
         8 . The device of  claim 1 , further comprising a humidifier. 
     
     
         9 . (canceled) 
     
     
         10 . (canceled) 
     
     
         11 . (canceled) 
     
     
         12 . (canceled) 
     
     
         13 . The device of  claim 1 , wherein said air-permeable substrate structure is a mesh having a percentage of open area between 10% and 60%. 
     
     
         14 . The device of  claim 13 , wherein said air-permeable substrate structure is a mesh having a percentage of open area between 20% and 60%. 
     
     
         15 . The device of  claim 13 , wherein said percentage of open area between 30% to 40%. 
     
     
         16 . (canceled) 
     
     
         17 . (canceled) 
     
     
         18 . (canceled) 
     
     
         19 . (canceled) 
     
     
         20 . (canceled) 
     
     
         21 . (canceled) 
     
     
         22 . The device of  claim 1 , wherein said ultraviolet light does not include a wavelength below 187 nm. 
     
     
         23 . The device of  claim 1 , further comprising a filter that blocks ultraviolet light having a wavelength of 188 nm or less. 
     
     
         24 . The device of  claim 1 , wherein said wavelength of ultraviolet light is between 340 nm and 380 nm. 
     
     
         25 . The device of  claim 1 , wherein at least 90% of the power of said light is emitted between 340 nm and 380 nm. 
     
     
         26 . The device of  claim 1 , wherein at least 99% of the power of said light is emitted between 350 nm and 370 nm. 
     
     
         27 . The device of  claim 1 , wherein less than 1% of said light is ultraviolet B radiation having a wavelength of between 280 nm and 315 nm. 
     
     
         28 . The device of  claim 1 , wherein said ultraviolet B radiation is less than 0.1% of the total radiation. 
     
     
         29 . (canceled) 
     
     
         30 . The device of  claim 1 , further comprising one or more filters to remove one or more contaminants from said airflow prior to flowing through said air-permeable substrate structure selected from the group consisting of nitrogen oxide (NOx), sulfur oxide (Sox), volatile organic molecules (VOM), household dust, pollen, dust-mite debris, mold spores, pet dander, smoke, smog, and bacteria. 
     
     
         31 . The device of  claim 30 , wherein said one or more filters is an organic vapor filter, a particulate filter, a high efficiency filter, a hydrophobic filter, an activated charcoal filter, or a combination thereof. 
     
     
         32 . The device of  claim 30 , wherein said contaminants comprise nitric oxide (NO), nitrogen dioxide (NO 2 ), sulfur oxide, sulfur dioxide, formaldehyde, acetaldehyde, toluene, propanol, or butene. 
     
     
         33 . The device of  claim 30 , wherein said one or more filters comprise a particulate filter capable of capturing particles between 0.3 microns and 10 microns in size. 
     
     
         34 . (canceled) 
     
     
         35 . (canceled) 
     
     
         36 . (canceled) 
     
     
         37 . The device of  claim 1 , wherein said air has a residence time on said catalyst surface of less than a second. 
     
     
         38 . The device of  claim 1 , wherein said air-permeable substrate structure further comprises a hygroscopic additive. 
     
     
         39 . (canceled) 
     
     
         40 . (canceled) 
     
     
         41 . (canceled) 
     
     
         42 . (canceled) 
     
     
         43 . The device of  claim 1 , wherein said catalyst is a metal or metal oxide catalyst selected from the group consisting of titanium dioxide, copper, copper oxide, zinc, zinc oxide, iron, iron oxide, tungsten, tungsten trioxide, and mixtures thereof. 
     
     
         44 . The device of  claim 43 , wherein said metal or metal oxide catalyst further comprises a co-catalyst selected from platinum, silver, gold, nickel, palladium, titanium dioxide ceramic, or extruded ceramic. 
     
     
         45 - 75 . (canceled)