Optical Fiber Remote Multiplexed Sensing System of Methane and its Application in Clean Development Mechanism

Abstract:

An optical fiber remote multiplexed sensing system of methane is designed based on the methane absorption spectroscopy characteristic, by taking the triangular signal to modulate the wavelength of the tunable diode laser. The laser wavelength shift is carried out adaptive adjustment by the built-in gas calibration pond to realize the locking of a methane absorption line. The methane concentration monitoring is realized in the range of 0-100%. The application tests are found in a garbage power generation plant and several coal mine ventilation air methane power generation plants. The results indicate that the monitor has good performances in stability and sensitivity and a long-term precision of 10ppm is achieved. It is possessed of wide application in Clean Development Mechanism (CDM) projects.

• Periodical: Advanced Materials Research (Volumes 347-353)
• Pages: 3826-3829
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.347-353.3826
• Online since: October 2011
• Authors: Yan Jie Zhao, Chang Wang, Tong Yu Liu, Yu Bin Wei, Yan Fang Li, Ting Ting Zhang, Ying Shang
• Keywords: Clean Development Mechanism, Fiber Optic, Garbage Power Generation, Methane Monitor, Spectral Absorption

References

[1] Longjiang Zheng, Peng Li, Ruifeng Qin et al. Research situation and developing tendency for optical measurement technology of gas density [J]. Laser & Optoelectronics Progress. 2008, 45(8):24-32. (In Chinese)

DOI: 10.3788/lop20084508.0024

[2] C. Roller, A. Fried, J .Walega, et al. Advances in hardware, system diagnostics software, and acquisition procedures for high performance airborne tunable diode laser measurement s of formaldehyde [J]. Appl. Phys. B, 2006, 82: 247-264.

DOI: 10.1007/s00340-005-1998-8

[3] D. P. Leleux, R. Claps, C. Chen, et al. Applications of Kalman filltering to real-time trace gas concentration measurements[ J] .Appl. Phys. B, 2002, 74: 85-93.

DOI: 10.1007/s003400200789

[4] Wencui Wang, Meisheng Luan, Tongyan Yu, Instrumentation for methane concentration detecting based on NDIR and the analysis of disturbances [J]. Infrared Technology, 2009, 131(8):458～460. (In Chinese)

[5] Yanjie Zhao, Yubin Wei, et al., Research of Fiber Couple Parameters Monitoring System of Methane and Temperature. Chinese Journal of lasers, 2010, 37(12):3070-3074. (In Chinese)

DOI: 10.3788/cjl20103712.3070

[6] R.T. Wainner, B. D. Green, M. G. Allenet al..Handheld, battery-powered near-IR TDL sensor for stand-off detection of gas and vapor plumes [J]. Appl. Phys. B, 2002, 75:249~254.

DOI: 10.1007/s00340-002-0984-7

[7] J. Ni, J. Chang, T. Liu, Q. Wang, et al. A Low Cost Multiplexed 1.331 μm Spectroscopic Remote Methane Sensor System.Proc. SPIE, 2007, Vol. 6595, 65952Z-1～4.

DOI: 10.1364/ofs.2006.the76

[8] Yanjie Zhao, et al. Application in Garbage Power Generation of Fiber Methane Monitor.2010 3rd International Conference on Power Electronics and Intelligent Transportation System.2010, pp: 178-181.

[9] J. Ni, J. Chang, T. Liu, et al. Fiber Methane Gas Sensor and Its Application in Methane Outburst Prediction in Coal Mine. Journal of electronic science and technology of china, 2008, 6(4), 373-376.

DOI: 10.1109/apos.2008.5226294

[10] Yanjie Zhao, Zeng Wang, et al., Application in Methane Extraction of Fiber Methane Monitoring System Based on Spectral Absorption[J], Spectroscopy and Spectral Analysis, 2010, 30(10), 2857-2860. (In Chinese)

[11] P.F. Bernath, Spectra of atoms and molecules. Oxford University Press, New York, 1995.

[12] J.R. Edisbury, Practical hints on absorption spectrometry. London: A. Hilger, 1966.