Title:
OPTICAL METHODS AND SYSTEMS FOR DETECTING A CONSTITUENT IN A GAS CONTAINING OXYGEN IN HARSH ENVIRONMENTS
Document Type and Number:
WIPO Patent Application WO2007121032
Kind Code:
B1
Abstract:
A method for detecting a gas phase constituent such as carbon monoxide, nitrogen dioxide, hydrogen, or hydrocarbons in a gas comprising oxygen such as air, includes providing a sensing material or film (20, 120) having a metal embedded in a catalytically active matrix such as gold embedded in a yttria stabilized zirconia (YSZ) matrix. The method may include annealing the sensing material at about 900°C, exposing the sensing material (20, 120) and gas to a temperature above 400°C, projecting light onto the sensing material (20, 120), and detecting a change in the absorption spectrum of the sensing material due to the exposure of the sensing material to the gas in air at the temperature which causes a chemical reaction in the sensing material compared to the absorption spectrum of the sensing material in the absence of the gas. Systems (700) employing such a method are also disclosed.
Inventors:
CARPENTER MICHAEL A (US)
SIRINAKIS GEORGE (GR)
SIRINAKIS GEORGE (GR)
Application Number:
PCT/US2007/064665
Publication Date:
April 17, 2008
Filing Date:
March 22, 2007
Export Citation:
Assignee:
UNIV NEW YORK STATE RES FOUND (US)
CARPENTER MICHAEL A (US)
SIRINAKIS GEORGE (GR)
CARPENTER MICHAEL A (US)
SIRINAKIS GEORGE (GR)
International Classes:
G01N21/31; G01N21/77; G01N21/78; G01N33/00
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