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Journal of Spectroscopy
Volume 2013 (2013), Article ID 524071, 8 pages
http://dx.doi.org/10.1155/2013/524071
Research Article

Temperature-Corrected Oxygen Detection Based on Multi-Mode Diode Laser Correlation Spectroscopy

1Department of Physics, Harbin Institute of Technology, Harbin 150001, China
2Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001, China
3Department of Physics, Lund University, Lund 22100, Sweden
4Joint Research Center of Photonics, Zhejiang University-Royal Institute of Technology-Lund University, Hangzhou 310058, China

Received 28 June 2012; Revised 30 September 2012; Accepted 14 October 2012

Academic Editor: Myong Yong Choi

Copyright © 2013 Xiutao Lou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Temperature-corrected oxygen measurements were performed by using multi-mode diode laser correlation spectroscopy at temperatures ranging between 300 and 473 K. The experiments simulate in situ monitoring of oxygen in coal-combustion exhaust gases at the tail of the flue. A linear relationship with a correlation coefficient of was found between the evaluated concentration and the gas temperature. Temperature effects were either auto-corrected by keeping the reference gas at the same conditions as the sample gas, or rectified by using a predetermined effective temperature-correction coefficient calibrated for a range of absorption wavelengths. Relative standard deviations of the temperature-corrected oxygen concentrations obtained by different schemes and at various temperatures were estimated, yielding a measurement precision of 0.6%.