Measurement of ethylene in combustion exhaust using a 3.3-μm distributed feedback interband cascade laser with wavelength modulation spectroscopy

Tanaka, Kotaro; Akishima, Kazushi; Sekita, Masahiro; Tonokura, Kenichi; Konno, Mitsuru

doi:10.1007/s00340-017-6798-4

Cited by 15 publications

(1 citation statement)

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“…Strand et al established a fixed-wavelength methodology for the measurement of a quantitative absorption cross-section of elevated temperature and pressure gases using an externalcavity quantum cascade laser with raid-tuning mode and broadscanning range [21]. Tanaka et al constructed a sensor for trace gas analysis of C 2 H 4 in combustion emission using WMS coupled with a DFB interband cascade laser near 3.356 µm under 3 kPa pressure [22]. The peak of the absorption may be shifted due to the change of the pressure in a practical combustion; these methods are difficult to implement for most sensors deployed in real-world environments.…”

Section: Introductionmentioning

confidence: 99%

A TDLAS Sensor for Simultaneous Measurement of Temperature and C2H4 Concentration Using a Differential Absorption Scheme at High Temperature

Zhang

Liu

et al. 2020

Front. Phys.

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Ethylene (C 2 H 4 ) concentration and temperature is simultaneously measured in high temperature environments using a differential absorption scheme combined with a distributed feedback (DFB) diode laser near 1. 620 µm. Based on optimal selection criteria, two wavelength pairs with absorption peaks at 6,174.58 cm −1 and 6,174.98 cm −1 are selected for the measurement. Temperatures are obtained from the ratio of the absorption cross-section of the two wavelength pairs, and C 2 H 4 concentration is inferred from the differential absorption of one of the wavelength pairs. Measurements are performed in a high temperature cell (T = 300-900 K, P = 1 atm) to verify the accuracy of the system. The accuracies for the measurement of C 2 H 4 concentration and temperature are 1.135 and 2.215%, respectively. Continuous time series measurements indicated that the system has a good stability, and the limit of detection achieved by Allan-Werle variance analysis is 6.6 ppm at the optimal average time of 340 s. All the measurements show the scheme is helpful for improving the practicality of laser absorption spectroscopy in combustion diagnosis.

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Section: Introductionmentioning

confidence: 99%