FT-IR Spectroscopy for the in-Flame Study of a 15 MW Dual Fuel Gas/Oil Burner

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An FT-IR (Fourier transform infrared) analyzer has been configured for combustion research and allows the simultaneous quantification of CO, CO2, CH4, C2H6, C2H2, C2H4, NO, and N2O concentrations in the flame of natural gas burners. The calibration has been carried out by the multivariate PLS1 algorithm, with calculated standard spectra. For the multivariate CO/CO2 model, special attention has been given to nonlinear effects caused by interference in the 2210-2250 cm-1 region. For this model, two methods of calculating mixture spectra and their influence on prediction parameters are evaluated. Furthermore, the sensitivity of the CO/CO2 model for N2O interference has been tested. The presented results show that conclusions drawn from statistical prediction parameters should be treated cautiously in models that have to deal with spectral interference.


Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702991945533

Publication date: October 1, 1999

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