Device and method for detecting sulfur dioxide at high temperatures
US8048682B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2008 |
| Grant date | Nov 1, 2011 |
| Priority date | — |
| Expiry date | Jul 13, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/186
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a method for selectively detecting and/or measuring gaseous SO2 at a temperature of at least 500° C., the method involving: (i) providing a SO2-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 SO2-detecting device with the SO2-containing sample while maintaining the magnitude and any temporal variation of the starting current, wherein said SO2-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 SO2 in the SO2-containing sample based on the measured change in electrical conductance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.