Corona destruction of volatile organic compounds and toxics
AssigneeThe United States of America as represented by the United States Environmental Protection Agency
InventorsCarlos M. Nunez, Geddes H. Ramsey, Wade H. Ponder, James H. Abbott
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Abstract
Apparatus and method for controlling volatile organic compounds and air toxics in a contaminated fluid flow through use of an excited species flow generated and introduced into the contaminated fluid flow to convert the contaminants into non-toxic compounds. Tungsten electrodes and an alternating current are used in the excited species generator.
Claims17
A method capable of controlling low levels of volatile organic compounds (VOCs) and toxics such as toluene, methane, hexane, benzene, halogenated toxics and ozone in a contaminated fluid flow and capable of operation at ambient temperatures comprising:
- passing said contaminated fluid flow through a conduit;
- passing a carrier gas through an excited species generator including at least one pair of electrodes forming a space therebetween with barium titanate pellets forming a packed bed in said space and with said carrier gas passing through said packed bed and between said pellets;
- connecting the output of said excited species generator to said conduit;
- applying electrical power to said excited species generator to generate an excited species flow in said carrier gas;
- introducing said excited species flow in said carrier gas after passing through said excited species generator into the contaminated fluid flow to combine said excited species carrier gas flow and said contaminated fluid flow;
- converting said VOCs and toxics into non-toxic compounds;
- and
- disposing of said non-toxic compounds.
Apparatus to control volatile organic compounds (VOCs) and toxics in a contaminated fluid flow comprising:
- at least one pair of electrodes of substantially the same surface area forming a space therebetween;
- a packed bed of barium titanate pellets positioned in said space;
- means to pass a gas flow through said packed bed and between said pellets;
- an alternating current source connected to produce a high voltage electric field across said electrodes and said pellets to develop electric fields between said pellets of sufficient magnitude to excite said gas flow to produce an excited species flow for reaction between said excited species and said contaminated fluid flow;
- to convert said VOCs and toxics to non-toxic compounds.
Dependencies are inferred from the claim text.