Method and device for cleaning the atmosphere
AssigneeEngelhard Corporation
InventorsJeffrey B. Hoke, Ronald M. Heck, Fred M. Allen
Life of this patent
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Abstract
Method for cleaning the atmosphere by adsorbing pollutants, e.g., hydrocarbons, ozone, carbon monoxide, nitrogen oxides, sulfur oxides, etc., contained in the atmosphere. The pollutant-containing atmosphere is contacted with an outer surface of a substrate, e.g., radiators, condensers, charge air coolers, transmission coolers, etc., which has been coated with an adsorptive material such as zeolites, molecular sieves, carbon, etc. The coated substrate is protected with an overcoat of at least one porous protective material such as alumina, silica and the like, such that the pollutants will come into contact with the adsorptive material, but harmful contaminants will be prevented from contacting the adsorptive material.
Claims13
A method of cleaning the atmosphere by adsorbing pollutants contained in the atmosphere comprising contacting the pollutant-containing atmosphere with an outer surface of a substrate which has been coated with an adsorptive material to render said surface capable of adsorbing said pollutants, wherein the coated surface has been protected with an overcoat of at least one protective material which is sufficiently porous to enable said pollutants to pass therethrough into operative contact with the adsorptive material and sufficiently protective to prevent harmful contaminants from contacting the adsorptive material.
Dependencies are inferred from the claim text.