Portable optical water-and-oil analyzer based on a mid-IR (1.6–2.4 μm) optron consisting of an LED array and a wideband photodiode
- 98 Downloads
An optical method for measuring the water and oil content using mid-IR (1.6–2.4 μm) LEDs and a wideband photodiode is suggested for the first time. This method is developed based on the absorption spectra of pure water, dewatered oil, and water—oil emulsions (cut oil) with different content of water and uses 10 types of LEDs in the spectral range 1.6–2.4 μm. It is shown that pure water heavily absorbs the LED radiation in the spectral range 1.85–2.05 μm, oil absorbs in the range 1.67–1.87 μm, and the LED radiation with a maximum at 2.20 μm is equally weakly absorbed by water and oil. An optical cell of the water-and-oil analyzer is designed on the basis of a three-element diode array with radiation maxima at 1.65 (detection of oil), 1.94 (detection of water), and 2.2 μm (reference signal) wideband photodiode covering the spectral range 1.3–2.4 μm. A calibration curve is derived that represents the dependence of the water concentration in oil on the amplitude of the reduced signal obtained by processing three signals from the LEDs. This optical method of measuring the water content in oil underlies a portable analyzer making possible online measurements directly in an oil well.
KeywordsRadiation Maximum Optical Cell Portable Analyzer Light Emit Diode Chip Light Emit Diode Array
Unable to display preview. Download preview PDF.
- 1.GOST (State Standard) 2477–65: Oil and Mineral Oils: Water Content Estimation Methods, 1965.Google Scholar
- 2.R. R. Samigullin and D. R. Khaziev, in Proceedings of the 4th International Scientific Technical Conference on Physics and Technical Applications of Wave Processes, Novgorod, NGTU, 2005.Google Scholar
- 3.T. N. Danilova, B. E. Zhurtanov, A. N. Imenkov, and Yu. P. Yakovlev, Fiz. Tekh. Poluprovodn. (St. Petersburg) 39, 1281 (2005) [Semiconductors 39, 1235 (2005)].Google Scholar
- 4.N. D. Stoyanov, B. E. Zhurtanov, A. P. Astakhova, A. N. Imenkov, and Yu. P. Yakovlev, Fiz. Tekh. Poluprovodn. (St. Petersburg) 37, 996 (2003) [Semiconductors 37, 971 (2003)].Google Scholar
- 5.N. D. Stoyanov, A. P. Astakhova, S. S. Molchanov, S. S. Kizhaev, B. E. Zhurtanov, K. V. Kalinina, T. I. Gurina, M. P. Mikhailova, A. N. Imenkov, and Yu. P. Yakovlev, in Proceedings of the 1st International Forum on Nanotechnology (Rusnanotech’08), Moscow, 2008, Vol. 1, pp. 176–178.Google Scholar
- 6.I. A. Andreev, N. D. Il’inskaya, E. V. Kunitsyna, M. P. Mikhailova, and Yu. P. Yakovlev, Fiz. Tekh. Poluprovodn. (St. Petersburg) 37, 974 (2003) [Semiconductors 37, 949 (2003)].Google Scholar
- 7.I. A. Andreev, E. V. Kunitsyna, M. P. Mikhailova, and Yu. P. Yakovlev, Fiz. Tekh. Poluprovodn. (St. Petersburg) 33, 249 (1999) [Semiconductors 33, 216 (1999)].Google Scholar
- 8.A. N. Imenkov, B. E. Zhurtanov, A. P. Astakhova, K. V. Kalinina, M. P. Mikhailova, M. A. Sipovskaya, and N. D. Stoyanov, Pis’ma Zh. Tekh. Fiz. 35(2), 6 (2009) [Tech. Phys. Lett. 35, 67 (2009)].Google Scholar
- 10.A. N. Baranov, A. N. Imenkov, A. I. Kolesnikov, M. P. Mikhailova, V. L. Shutov, and Yu. P. Yakovlev, Bum. Prom-st 8, 20 (1989).Google Scholar
- 12.M. Maksjutenko, A. Maksyutenko, V. Tolstinskiy, M. Mikhailova, V. Sherstnev, A. Astakhova, N. Stoyanov, and Yu. P. Yakovlev, in Proceedings of the 3rd International Conference on Mid-Infrared Optoelectronics: Materials and Devices (MIOMD III), Aachen, 1999.Google Scholar
- 13.N. Stoyanov, in Proceedings of the International Seminar on Light Emitting Diode (LED) and Semiconductor Lighting, Seoul, South Korea, 2005, pp. 131–148.Google Scholar
- 14.M. Mikhailova, N. Stoyanov, I. Andreev, B. Zhurtanov, S. Kizhaev, E. Kunitsyna, Kh. Salikhov, and Yu. P. Yakovlev, Proc. SPIE 6285, 628526 (2007).Google Scholar
- 15.Catalog HITRAN www.cfa.harvard.edu/HITRAN.
- 16.B. Andrews, in Proceedings of the 6th International Conference on Mid-Infrared Optoelectronics: Materials and Devices (MIOMD VI), St. Petersburg, 2004, p. 88.Google Scholar