Solid-state light source photolytic nitrogen dioxide converter

Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – With means applying electromagnetic wave energy or...

Reexamination Certificate

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Reexamination Certificate

active

10313827

ABSTRACT:
A solid-state light source photolytic NO2converter including a reaction chamber made of a reflective material with diffuse reflective properties, whereby the reaction chamber includes a low volume gas cell wherein the gas sample residence time is less than 5 seconds is provided. The NO2in the air sample is exposed to ultraviolet radiation at wavelengths less than 420 nm, whereby the NO2is converted to NO. The NO is subsequently measured using an NO analyzer. The solid-state light source includes diode lasers and LED's that emit UV wavelength in the range of 350–420 nm. The use of a narrow wavelength range afforded by the solid-state light source results in an interference-free conversion of NO2to NO at high efficiency.

REFERENCES:
patent: 3840342 (1974-10-01), Neti et al.
patent: 3984688 (1976-10-01), Von Bargen et al.
patent: 4822564 (1989-04-01), Howard
patent: 5171610 (1992-12-01), Liu
patent: 5571724 (1996-11-01), Johnson
patent: 5903358 (1999-05-01), Zare et al.
patent: 5906946 (1999-05-01), Sausa et al.
patent: 6280801 (2001-08-01), Schmitt
patent: 6346419 (2002-02-01), Ryerson et al.
patent: 6669827 (2003-12-01), Austin
patent: 0 335 268 (1989-10-01), None
patent: 0 511 806 (1992-11-01), None
patent: 1 037 036 (2000-09-01), None
patent: 2839890 (2003-11-01), None
Ryerson et al., “An Efficient Photolysis System for Fast-Response NO2 Measurements”, Journal of Geophysical Research, vol. 105, Nov. 2000, pp. 26,447-26,461.
R.K. Stevens and J.A. Hodgeson,Applications of Chemiluminescence Reactions to the Measurement of Air Pollutants, Anal. Chem., 45, p. 443A (1973.
L.P. Breitenbach and M. Shelef, Development of a Method for the Analysis of NO2 and NH3 by NO-Measuring Instruments, J. Air Poll. Control Assoc., 23, p. 128 (1973).
Kley D. and McFarland M., Chemiluminescense detector for NO and NO2, Atmospheric Technology, 12 (1980).
National Ambilent air Qiality Standards, 40 CFR 50 (1983), Measurement Principle and Calibration Procedure for the Measurement of Nitrogen Dioxide in the Atmosphere (Gas Phase Chemiluminescense).
Ryerson, et al., An efficient photolysis system for fast response NO2 measurements, Journal Geophys. Res., 105 (2000).

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