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Mid-Infrared Dual Frequency Comb Spectroscopy for Combustion Analysisin the 2.8 to 5 micron Spectral Region

Published

Author(s)

Ian Coddington, Nathan R. Newbury, Greg Rieker, Amanda S. Makowiecki, Daniel Herman, Nazanin Hoghooghi, Elizabeth F. Strong, Gabriel Ycas, Fabrizio Giorgetta, Ryan Cole, Caelan Lapointe, Jeff Glusman, John Daily, Peter E. Hamlington

Abstract

We demonstrate the application of mode-locked mid-infrared dual frequency comb spectroscopy for combustion analysis. With two settings of the same dual-comb system, the measurement spans 1500 cm-1 (2.8 to 5 microns) with 0.0067 cm-1 (200 MHz) point spacing, or almost a quarter-million discrete comb modes. Using this broadband spectrometer, we quantify the pyrolysis and smoldering combustion of wood samples. Specifically, we measure 20-second time-resolved mole fractions of CH4, H2O, two isotopologues of CO2 (12C16O2, 13C16O2), two isotopologues of CO (12C16O, 13C16O), ethane, formaldehyde, methanol, formic acid, as well as gas temperature directly above radiatively heated wood samples. The combination of the fine spectral resolution and the broad bandwidth of the spectrometer allows for precise separation of absorption signatures of individual molecules from the congested spectra.
Citation
Proceedings of the Combustion Institute

Keywords

frequency comb, combustion, spectroscopy

Citation

Coddington, I. , Newbury, N. , Rieker, G. , Makowiecki, A. , Herman, D. , Hoghooghi, N. , Strong, E. , Ycas, G. , Giorgetta, F. , Cole, R. , Lapointe, C. , Glusman, J. , Daily, J. and Hamlington, P. (2020), Mid-Infrared Dual Frequency Comb Spectroscopy for Combustion Analysisin the 2.8 to 5 micron Spectral Region, Proceedings of the Combustion Institute, [online], https://doi.org/10.1016/j.proci.2020.06.195 (Accessed May 23, 2024)

Issues

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Created June 7, 2020, Updated August 17, 2022