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Proceedings Article

Refractive index sensing for online monitoring water and ethanol content in bio fuels

[+] Author Affiliations
S. Belle, S. Scheurich, R. Hellmann

Univ. of Applied Sciences (Germany)

S. So, I. J. G. Sparrow, G. D. Emmerson

Stratophase Ltd. (United Kingdom)

Proc. SPIE 7726, Optical Sensing and Detection, 77261K (May 13, 2010); doi:10.1117/12.853849
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From Conference Volume 7726

  • Optical Sensing and Detection
  • Francis Berghmans; Anna G. Mignani; Chris A. van Hoof
  • Brussels, Belgium | April 12, 2010

abstract

We report on a refractive index sensor based on a planar Bragg grating (PBG) capable to online monitor the water content in Biodiesel and the amount of ethanol admixture to conventional fuels, respectively. Our results demonstrate the capability of the sensor to distinguish the transition between about 190 and 500 ppm water in Biodiesel, enabling to monitor the production process of Biodiesel in the relevant range according to industrial standards. The ethanol content in petrol has been investigated in the range of 0-100%, covering the entire standardized range of E-5 to E-85 fuel mixing ratios. These experiments reveal a sensitivity of 112 nm/riu allowing the measurement of the ethanol content with a resolution of 8.9·10-6.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

S. Belle ; S. Scheurich ; R. Hellmann ; S. So ; I. J. G. Sparrow, et al.
"Refractive index sensing for online monitoring water and ethanol content in bio fuels", Proc. SPIE 7726, Optical Sensing and Detection, 77261K (May 13, 2010); doi:10.1117/12.853849; http://dx.doi.org/10.1117/12.853849


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