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This content is being minimally managed and was last updated in 2010. EPA recognizes that this content is relevant to site remediation stakeholders and will continue streamlined review and maintenance of this content.
| Literature Search - Detailed Result |
| A Hybrid Thermal Video and FTIR Spectrometer for Rapidly Locating and Characterizing Gas Leaks |
| Williams, D.J., D. Stone, C. Salvaggio, and D.A. Messinger. Remote Sensing of Aerosol and Chemical Gases: Model Simulation, Assimilation, and Applications to Air Quality. Proceeding of SPIE--The International Society for Optical Engineering, Vol 6299, 4 pp, 2006 |
Undiscovered gas leaks in chemical plants and refinery operations can impact regional air quality and present a loss of product for industry. An efficient, accurate, and cost-effective method for detecting and quantifying fugitive emissions would both save industries money by identifying production losses and improve regional air quality. Though specialized thermal video systems have proven effective in rapidly locating gas leaks, these systems do not have the spectral resolution for compound identification. Passive FTIR spectrometers can be used for gas compound identification, but using these systems for facility surveys is problematic due to their small field of view. A hybrid approach has been developed that utilizes the thermal video system to locate gas plumes using real-time visualization of the leaks, coupled with the high spectral resolution FTIR spectrometer for compound identification and quantification. The prototype hybrid video/spectrometer system uses a sterling cooled thermal camera, operating in the MWIR (3-5 microns) with an additional notch filter set at around 3.4 microns, which allows for the visualization of gas compounds that absorb in this narrow spectral range, such as alkane hydrocarbons. This camera is positioned alongside a portable, high-speed, passive FTIR spectrometer that has a spectral range of 2 to 25 microns and operates at 4 cm-1 resolution. This system uses a 10 cm telescope foreoptic with an onboard blackbody for calibration. The two units are optically aligned using a turning mirror on the spectrometer's telescope with the video camera's output. |
If this link doesn't work, please notify us: More Info: http://www.cis.rit.edu/~cnspci/publications/62990O-1.pdf
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