Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1995-12-08
2000-06-27
Griffin, Steven P.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
95 90, 95129, 423210, 4232453, 4232391, B01D 5302, B01D 5386
Patent
active
060802812
ABSTRACT:
Disclosed is a method for separating a vaporous or gaseous contaminant from an air stream contaminated therewith. This method includes the steps of: (a) passing said contaminated air into a contact zone in which is disposed an aerogel material capable of selecting adsorbing said contaminant from air and therein contacting said contaminated air with an aerogel material; and (b) withdrawing from said zone, air depleted of said contaminant. For present purposes, "contaminant" means a material not naturally occurring in ambient air and/or a material naturally occurring in air but present at a concentration above that found in ambient air. Thus, the present invention scrubs (or treats) air for the purpose of returning it to its ambient composition. Also disclosed herein is a process for the photocatalytic destruction of contaminants from an air stream wherein the contaminated air stream is passed into a control cell or contact zone in which is disposed a photocatalytic aerogel and exposing said aerogel to ultraviolet (UV) radiation for photocatalytically destroying the adsorbed contaminant, and withdrawing from said cell an exhaust air stream depleted in said contaminant.
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Formenti, M., et al. Bulletin of the Chem. Soc. France, (1972), pp. 69-76.
DiMauro Peter
Griffin Steven P.
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