Real-time 2D Concentration Measurement of CH4 in Oscillating Flames Using CT Tunable Diode Laser Absorption Spectroscopy

Kamimoto, Takahiro; Deguchi, Yoshihiro; Zhang, Ning; Nakao, Ryota; Takagi, Taku; Zhang, Jiazhong

doi:10.5890/jand.2015.09.009

Cited by 12 publications

(9 citation statements)

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“…Two dimensional (2D) temperature and concentration maps can be obtained by combining the TDLAS method with a set of individual detectors or a focal planar array (FPA) detector. Kamimoto et al obtained 2D CH 4 concentration distributions using a 16 path TDLAS measurement cell [149]. In another study from the same group, FB lasers at 1.388 and 1.635 µm were used to measure water vapor, and CH 4 concentration, respectively.…”

Section: Tunable Diode Laser Absorption Spectroscopy (Tdlas)mentioning

confidence: 99%

Non-Thermal Plasma for Process and Energy Intensification in Dry Reforming of Methane

et al. 2020

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Plasma-assisted dry reforming of methane (DRM) is considered as a potential way to convert natural gas into fuels and chemicals under near ambient temperature and pressure; particularly for distributed processes based on renewable energy. Both catalytic and photocatalytic technologies have been applied for DRM to investigate the CH4 conversion and the energy efficiency of the process. For conventional catalysis; metaldoped Ni-based catalysts are proposed as a leading vector for further development. However; coke deposition leads to fast deactivation of catalysts which limits the catalyst lifetime. Photocatalysis in combination with non-thermal plasma (NTP), on the other hand; is an enabling technology to convert CH4 to more reactive intermediates. Placing the catalyst directly in the plasma zone or using post-plasma photocatalysis could generate a synergistic effect to increase the formation of the desired products. In this review; the recent progress in the area of NTP-(photo)catalysis applications for DRM has been described; with an in-depth discussion of novel plasma reactor types and operational conditions including employment of ferroelectric materials and nanosecond-pulse discharges. Finally, recent developments in the area of optical diagnostic tools for NTP, such as optical emission spectroscopy (OES), in-situ FTIR, and tunable diode laser absorption spectroscopy (TDLAS), are reviewed.

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Section: Tunable Diode Laser Absorption Spectroscopy (Tdlas)mentioning

confidence: 99%

Non-Thermal Plasma for Process and Energy Intensification in Dry Reforming of Methane

et al. 2020

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“…The external cavity type laser diode was split using the fiber splitter to 16 laser paths. 22,23 The absorption signals of 16 paths were detected and recorded simultaneously. The CT reconstruction rate was 1 ms/image using the absorption spectra with 30 times average.…”

Section: Experimental Systemmentioning

confidence: 99%

“…Recently, combination of computed tomography (CT) and TDLAS has been studied and applied for two-dimensional (2D) measurements of temperature and concentration in combustion processes. 15–24 In past studies, H 2 O absorption spectra using narrow wavelength range scanning lasers were used for 2D temperature measurement. 20–24 However, these lasers are not applicable for temperature measurement in high-pressure condition, such as 1.0–5.0 MPa.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Temperature Measurement in a High-Temperature and High-Pressure Combustor Using Computed Tomography Tunable Diode Laser Absorption Spectroscopy (CT-TDLAS) with a Wide-Scanning Laser at 1335–1375 nm

et al. 2019

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Tunable diode laser absorption spectroscopy (TDLAS) technology is a developing method for temperature and species concentration measurements with the features of non-contact, high precision, high sensitivity, etc. The difficulty of two-dimensional (2D) temperature measurement in actual combustors has not yet been solved because of pressure broadening of absorption spectra, optical accessibility, etc. In this study, the combination of computed tomography (CT) and TDLAS with a wide scanning laser at 1335–1375 nm has been applied to a combustor for 2D temperature measurement in high temperature of 300–2000 K and high pressure of 0.1–2.5 MPa condition. An external cavity type laser diode with wide wavelength range scanning at 1335–1375 nm was used to evaluate the broadened H2O absorption spectra due to the high-temperature and high-pressure effect. The spectroscopic database in high temperature of 300–2000 K and high pressure of 0.1–5.0 MPa condition has been revised to improve the accuracy for temperature quantitative analysis. CT reconstruction accuracy was also evaluated in different cases, which presented the consistent temperature distribution between CT reconstruction and assumed distributions. The spatial and temporal distributions of temperature in the high-temperature and high-pressure combustor were measured successfully by CT-TDLAS using the revised spectroscopic database.

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“…The temperature and species concentration at each analysis grid are determined using a multifunction minimization method to reduce the spectral fitting error, as shown in Figure 5. The measurement errors are induced by a lot of factors, such as number of beams, view angles, CT-algorism, uncertainty of spectral database, and so on [7][8][9][10][11][12][13][14][15].…”

Section: Temperature Sensingmentioning

confidence: 99%

“…The CT-TDLAS method has been applied to the oscillating flames to measure the timeresolved 2D temperature and concentration distributions [9,11]. Figure 13 shows the experimental setup of time-resolved 2D temperature and CH 4 concentration measurements using CT-TDLAS in an oscillating CH 4 -Air Bunsen-type flame.…”

Section: Burner and Plant Applicationsmentioning

confidence: 99%

Industrial Applications of Tunable Diode Laser Absorption Spectroscopy

Wang¹,

Kamimoto²,

Deguchi³

2018

Temperature Sensing

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Tunable diode laser absorption spectroscopy (TDLAS) utilizes the absorption phenomena to measure the temperature and species concentration. The main features of the TDLAS technique are its fast response and high sensitivity. Extensive research has been performed on the utilization of diode laser absorption spectroscopy for the system monitoring and its control. The TDLAS technique gives self-calibrations to reduce the noise such as particles and dusts because the laser wavelength is rapidly modulated at kHz rates. In addition, two dimensional (2D) temperature and concentration distributions can be obtained by combining computed tomography (CT) with TDLAS. The TDLAS applications have been extensively studied with great progress. This chapter largely focuses on the engineering fields, especially the practical industrial applications.

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Real-time 2D Concentration Measurement of CH4 in Oscillating Flames Using CT Tunable Diode Laser Absorption Spectroscopy

Cited by 12 publications

References 0 publications

Non-Thermal Plasma for Process and Energy Intensification in Dry Reforming of Methane

Non-Thermal Plasma for Process and Energy Intensification in Dry Reforming of Methane

Two-Dimensional Temperature Measurement in a High-Temperature and High-Pressure Combustor Using Computed Tomography Tunable Diode Laser Absorption Spectroscopy (CT-TDLAS) with a Wide-Scanning Laser at 1335–1375 nm

Industrial Applications of Tunable Diode Laser Absorption Spectroscopy

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