Measuring and testing – Gas analysis – With compensation detail
Patent
1998-10-16
2000-08-22
Williams, Hezron
Measuring and testing
Gas analysis
With compensation detail
422 78, 436135, G01N 2124
Patent
active
06105416&
ABSTRACT:
A system that can accurately monitor and control low concentrations of ethylene gas includes a test chamber configured to receive sample gas potentially containing an ethylene concentration and ozone, a detector configured to receive light produced during a reaction between the ethylene and ozone and to produce signals related thereto, and a computer connected to the detector to process the signals to determine therefrom a value of the concentration of ethylene in the sample gas. The supply for the system can include a four way valve configured to receive pressurized gas at one input and a test chamber. A piston is journaled in the test chamber with a drive end disposed in a drive chamber and a reaction end defining with walls of the test chamber a variable volume reaction chamber. The drive end of the piston is pneumatically connected to two ports of the four way valve to provide motive force to the piston. A manifold is connected to the variable volume reaction chamber, and is configured to receive sample gasses from at least one of a plurality of ports connectable to degreening rooms and to supply the sample gas to the reactive chamber for reaction with ozone. The apparatus can be used to monitor and control the ethylene concentration in multiple degreening rooms.
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Finalyson et al. "Low-Pressure Gas-Phase Ozone-Olefin Reactions. Chemiluminescence, Kinetics, and Mechanism", Journal of the American Chemical Society / 96:17/, Aug. 21, 1974, pp. 5356-5267.
Toby, "Chemiluminescence in the Reactions of Ozone", Chem. Rev. 84, 1984, pp. 277-285.
International Search Report dated Feb. 24, 2000.
Kanc James A.
Nelson Bruce N.
Richard, II Roy V.
Geo-Centers, Inc.
Politzer Jay L.
Williams Hezron
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