Here we report on the broadband detection of nitrous oxide (N2O) and methane (CH4) mixtures in dry nitrogen by using a quartz-enhanced photoacoustic (QEPAS) sensor exploiting an array of 32 distributed-feedback quantum cascade lasers, within a spectral emission range of 1190−1340 cm−1 as the excitation source. Methane detection down to a minimum detection limit of 200 ppb at 10 s lock-in integration time was achieved. The sensor demonstrated a linear response in the range of 200−1000 ppm. Three different mixtures of N2O and CH4 in nitrogen at atmospheric pressure have been analyzed. The capability of the developed QEPAS sensor to selectively determine the N2O and CH4 concentrations was demonstrated, in spite of significant overlap in their respective absorption spectra in the investigated spectral range.

Broadband detection of methane and nitrous oxide using a distributed-feedback quantum cascade laser array and quartz-enhanced photoacoustic sensing / Giglio, Marilena; Zifarelli, Andrea; Sampaolo, Angelo; Menduni, Giansergio; Elefante, Arianna; Blanchard, Romain; Pfluegl, Christian; Witinski, Mark F.; Vakhshoori, Daryoosh; Wu, Hongpeng; Passaro, Vittorio M. N.; Patimisco, Pietro; Tittel, Frank K.; Dong, Lei; Spagnolo, Vincenzo. - In: PHOTOACOUSTICS. - ISSN 2213-5979. - ELETTRONICO. - 17:(2020), p. 100159. [10.1016/j.pacs.2019.100159]

Broadband detection of methane and nitrous oxide using a distributed-feedback quantum cascade laser array and quartz-enhanced photoacoustic sensing

Giglio, Marilena;Sampaolo, Angelo;Menduni, Giansergio;Passaro, Vittorio M. N.;Patimisco, Pietro;Spagnolo, Vincenzo
2020-01-01

Abstract

Here we report on the broadband detection of nitrous oxide (N2O) and methane (CH4) mixtures in dry nitrogen by using a quartz-enhanced photoacoustic (QEPAS) sensor exploiting an array of 32 distributed-feedback quantum cascade lasers, within a spectral emission range of 1190−1340 cm−1 as the excitation source. Methane detection down to a minimum detection limit of 200 ppb at 10 s lock-in integration time was achieved. The sensor demonstrated a linear response in the range of 200−1000 ppm. Three different mixtures of N2O and CH4 in nitrogen at atmospheric pressure have been analyzed. The capability of the developed QEPAS sensor to selectively determine the N2O and CH4 concentrations was demonstrated, in spite of significant overlap in their respective absorption spectra in the investigated spectral range.
2020
Broadband detection of methane and nitrous oxide using a distributed-feedback quantum cascade laser array and quartz-enhanced photoacoustic sensing / Giglio, Marilena; Zifarelli, Andrea; Sampaolo, Angelo; Menduni, Giansergio; Elefante, Arianna; Blanchard, Romain; Pfluegl, Christian; Witinski, Mark F.; Vakhshoori, Daryoosh; Wu, Hongpeng; Passaro, Vittorio M. N.; Patimisco, Pietro; Tittel, Frank K.; Dong, Lei; Spagnolo, Vincenzo. - In: PHOTOACOUSTICS. - ISSN 2213-5979. - ELETTRONICO. - 17:(2020), p. 100159. [10.1016/j.pacs.2019.100159]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/189088
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