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14 December 2004 Optical fiber Raman sensor for monitoring hydrocarbon in fuel and industrial chemical processing
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Proceedings Volume 5589, Fiber Optic Sensor Technology and Applications III; (2004)
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States
Ethanol and methanol form the essential components in the hydrocarbon-based fuels, serving as transportation fuels also; and will likely play an increasingly important role in the future as crucial fuel components. The motivation of the present work is to differentiate such hydrocarbons from their mixture sample on the basis of their spectrum analysis for various ratios of their composition. A fiber optic Spontaneous Raman sensor is developed as a probe indicator for component detection of such hydrocarbon mixtures. The sensor employs a frequency doubled 532 nm continuous ND:YAG laser and a specially designed fiber optic Raman probe. Raman signal was collected by six optical fibers; filtered, and then fed to the spectrometer through another optical fiber bundle. Attractiveness of our scheme lies in the online determination of sample constituents without employing specially designed IR fiber with much-complicated and expensive IR spectroscopy and, with no alteration in sample physico-chemical structure. Spectral analysis techniques based on spectral shape band intensities and areas and some multi-component analysis are being tested to find the most effective tool for measuring ethanol and methanol from the mixture. The analysis results from these tests will be presented in the paper.
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Vidhu S. Tiwari, Sunil K. Khijwania, Fang-Yu Yueh, and Jagdish P. Singh "Optical fiber Raman sensor for monitoring hydrocarbon in fuel and industrial chemical processing", Proc. SPIE 5589, Fiber Optic Sensor Technology and Applications III, (14 December 2004);


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