Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Reexamination Certificate
2000-04-14
2002-04-16
Mayekar, K. (Department: 1741)
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
C422S186070, C422S186110, C422S186190, C422S186200
Reexamination Certificate
active
06372097
ABSTRACT:
BACKGROUND
1. Field of the Invention
The present invention relates generally to a methodology of generating ozone, and more particularly, to a method and apparatus for efficient surface generation of high concentration ozone and liquid ozone.
2. Discussion of the Related Art
Prior to the embodiments of the present disclosure, generation of ozone (O
3
) with high concentration (e.g., on the order of greater than twenty-five percent (25%)) and high rate of pure O
3
generation have not been possible. A majority of the known state-of-the-art O
3
generation is accomplished through corona discharge, which has a yield on the order of around ten to fifteen percent (10-15%) maximum and at a low generation rate. Usage of O
3
has typically been limited to a low concentration (e.g., less than fifteen percent (<15%) and the generating of O
3
constrained to being generated at the point-of-use.
Another method of ozone generation is UV ozone generation, which has an even lower concentration yield as compared to electric discharge ozone generation. A third and less popular method is electrolytic ozone generation. With electrolytic ozone generation, aqueous solutions of sulfuric or perchloric acid are electrolyzed with extremely high anodic current densities. In the later instance, oxygen (O
2
) and, in the case of sulfuric acid solutions, peroxydisulfuric acid, H
2
S
2
O
8
, are by-products.
Accordingly, a method and apparatus for the generation of high concentration O
3
at the point-of-use (or at other than the point-of-use), and at a substantially limitless scalable production rate and volume are desired.
SUMMARY
According to one embodiment, an apparatus for generating ozone (O
3
) includes a chamber and a plasma source. The plasma source couples to the chamber and produces oxygen plasma from a supply of oxygen. The plasma includes at least a mixture of O and O
2
species. Lastly, a quencher is disposed within the chamber proximate an output of the plasma source for facilitating ozone generation from the mixture of O and O
2
species.
A technical advantage provided by the embodiments of the present disclosure is the generation of high concentration O
3
at the point-of-use or location other than the point-of-use. In addition, the present embodiments provide the ability for achieving a substantially limitless scalable production rate and volume of high concentration O
3
.
REFERENCES:
patent: 4095115 (1978-06-01), Orr, Jr. et al.
patent: 4167466 (1979-09-01), Orr, Jr. et al.
patent: 5332555 (1994-07-01), Hosokawa et al.
patent: 5624734 (1997-04-01), Rees et al.
patent: 5756054 (1998-05-01), Wong et al.
patent: 5785824 (1998-07-01), Kitayama et al.
patent: 6193852 (2001-02-01), Caracciolo et al.
“Ozone in Water Treatment, Application and Engineering, Cooperative Research Report,” pp. 432-437, Edited by Bruno Langlais, David A. Reckhow and Deborah R. Brink (no date available).
Balconi-Lamica Michael J.
Chen Laboratories
Haynes and Boone LLP
Mayekar K.
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