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Device and method for detecting sulfur dioxide at high temperatures

United States Patent

November 1, 2011
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
The present invention relates to a method for selectively detecting and/or measuring gaseous SO.sub.2 at a temperature of at least C., the method involving: (i) providing a SO.sub.2-detecting device including an oxygen ion-conducting substrate having on its surface at least three electrodes comprising a first, second, and third electrode; (ii) driving a starting current of specified magnitude and temporal variation between the first and second electrodes; (iii) contacting the SO.sub.2-detecting device with the SO.sub.2-containing sample while maintaining the magnitude and any temporal variation of the starting current, wherein said SO.sub.2-containing sample causes a change in the electrical conductance of said device; and (iv) detecting the change in electrical conductance of the device based on measuring an electrical property related to or indicative of the conductance of the device between the first and third electrodes, or between the second and third electrodes, and detecting SO.sub.2 in the SO.sub.2-containing sample based on the measured change in electrical conductance.
West; David L. (Oak Ridge, TN), Montgomery; Frederick C. (Oak Ridge, TN), Armstrong; Timothy R. (Clinton, TN)
UT-Battelle, LLC (Oak Ridge, TN)
12/ 111,641
April 29, 2008
This invention was made with government support under Contract Number DE-AC05-00OR22725 between the United States Department of Energy and UT-Battelle, LLC. The U.S. government has certain rights in this invention.