Investigation on the NO formation of ammonia oxidation in a shock tube applying tunable diode laser absorption spectroscopy

Zhu, Denghao; Qu, Zhechao; Li, Mengdi; Agarwal, Sumit; Fernandes, Ravi X.; Shu, Bo

doi:10.1016/j.combustflame.2022.112389

Cited by 22 publications

(44 citation statements)

References 61 publications

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“…As an in-situ, line-of-sight, and noninvasive measurement method, tunable diode laser absorption spectroscopy was utilized as a supportive method to quantify the NO concentration in the PFR. The NO laser is a continuous wave interband cascade laser (ICL, Nanoplus) with a central wavelength of 1915.76 cm –1 . The wavelength was tuned by varying the current and the temperature, using the modular laser diode controller (LDC-3900, ILX Lightwave) and characterized by a wavelength meter (671B, Bristol Instruments).…”

Section: Experimental and Modeling Methodsmentioning

confidence: 99%

“…The time-resolved NO profiles were measured using the same laser as mentioned in Section but using fixed-wavelength absorption spectroscopy for a high temporal resolution. As noted in ref , because of a relatively low dilution ratio, the effect of varying pressure and temperature on the absorption coefficient cannot be ignored. The pressure variation was taken directly from the measured profile by the pressure sensor.…”

Section: Experimental and Modeling Methodsmentioning

confidence: 99%

Section: Experimental and Modeling Methodsmentioning

confidence: 99%

“…This procedure was repeated twice and then a formal mixture charging was started. Note that a 90% dilution ratio was used in this study, making the NH 3 mole fraction high enough to ignore the relatively minor adsorption on the surface Table shows the experimental conditions.…”

Section: Experimental and Modeling Methodsmentioning

confidence: 99%

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Interactions in Ammonia and Hydrogen Oxidation Examined in a Flow Reactor and a Shock Tube

et al. 2023

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Ammonia (NH 3 ) is a promising fuel, because it is carbon-free and easier to store and transport than hydrogen (H 2 ). However, an ignition enhancer such as H 2 might be needed for technical applications, because of the rather poor ignition properties of NH 3 . The combustion of pure NH 3 and H 2 has been explored widely. However, for mixtures of both gases, mostly only global parameters such as ignition delay times or flame speeds were reported. Studies with extensive experimental species profiles are scarce. Therefore, we experimentally investigated the interactions in the oxidation of different NH 3 /H 2 mixtures in the temperature range of 750−1173 K at 0.97 bar in a plug-flow reactor (PFR), as well as in the temperature range of 1615−2358 K with an average pressure of 3.16 bar in a shock tube. In the PFR, temperature-dependent mole fraction profiles of the main species were obtained via electron ionization molecular-beam mass spectrometry (EI-MBMS). Additionally, for the first time, tunable diode laser absorption spectroscopy (TDLAS) with a scanned-wavelength method was adapted to the PFR for the quantification of nitric oxide (NO). In the shock tube, time-resolved NO profiles were also measured by TDLAS using a fixed-wavelength approach. The experimental results both in PFR and shock tube reveal the reactivity enhancement by H 2 on ammonia oxidation. The extensive sets of results were compared with predictions by four NH 3 -related reaction mechanisms. None of the mechanisms can well predict all experimental results, but the Stagni et al. [React.

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Section: Experimental and Modeling Methodsmentioning

confidence: 99%

Section: Experimental and Modeling Methodsmentioning

confidence: 99%

Section: Experimental and Modeling Methodsmentioning

confidence: 99%

Section: Experimental and Modeling Methodsmentioning

confidence: 99%

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Interactions in Ammonia and Hydrogen Oxidation Examined in a Flow Reactor and a Shock Tube

et al. 2023

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“…Additionally, the NO concentration measurement in the gas-phase oxidation of ammonia under 90% argon dilution determined in the temperature range of 1581-2720 K near 3 bar is being used and well validated with the evaluated Ar broadening coefficient data. More details on the measurement are available in the reference [27].…”

Section: Broadening Coefficient Armentioning

confidence: 99%

Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N2, CO2, Ar, H2, O2 and He

et al. 2023

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A tunable diode laser absorption spectroscopy (TDLAS)-based spectrometer employing a mid-infrared (Mid-IR) interband cascade laser (ICL) was developed and used to determine pressure broadening coefficients of two NO absorption transitions at 1914.98 cm−1 and 1915.76 cm−1 in the fundamental (1←0) band (R11.5 Ω1/2 and Ω3/2) for CO2, N2, Ar, O2, He, and H2. For the first time, a reliable and consistent set of six different pressure-broadening coefficients for the NO line has been measured by a consistent approach covering pressures from 100 to 970 mbar at a temperature of 294 K. Air pressure broadening has been calculated based on N2 and O2 coefficients. The stated pressure-broadening coefficients for N2, CO2, Ar, H2, O2, He, and Air have relative errors in the 0.5–1.5% range. For CO2 and H2, broadening results of NO (1←0) band (R11.5 Ω1/2 and Ω3/2) lines are reported for the first time. The results are also compared to previously available literature data. It was found that the broadening coefficients for O2 and Air are in agreement with literature values, whereas results for Ar and He show larger differences.

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Development of comprehensive kinetic models of ammonia/methanol ignition using Reaction Mechanism Generator (RMG)

Nadiri

Shu

Goldsmith

et al. 2023

Combustion and Flame

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Investigation on the NO formation of ammonia oxidation in a shock tube applying tunable diode laser absorption spectroscopy

Cited by 22 publications

References 61 publications

Interactions in Ammonia and Hydrogen Oxidation Examined in a Flow Reactor and a Shock Tube

Interactions in Ammonia and Hydrogen Oxidation Examined in a Flow Reactor and a Shock Tube

Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N2, CO2, Ar, H2, O2 and He

Development of comprehensive kinetic models of ammonia/methanol ignition using Reaction Mechanism Generator (RMG)

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