Title: |
Title:
Effects of the spatial heterogeneity of gas matrix and thermal boundary layers on absolute TDLAS HCl measurements in hot flue gases
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Authors: |
Authors:
Qu, Zhechao, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.4, Analytische Chemie der GasphaseNwaboh, Javis, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.4, Analytische Chemie der Gasphase Werhahn, Olav, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.4, Analytische Chemie der Gasphase Ebert, Volker, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.4, Analytische Chemie der Gasphase |
Contributors: |
Contributors:
HostingInstitution: Physikalisch-Technische Bundesanstalt (PTB), ISNI: 0000 0001 2186 1887
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Pages: |
Pages:
1
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Languages: |
Languages:
en
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DOI: |
DOI:
10.7795/810.20200309
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Resource Type: |
Resource Type:
Text / Poster
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Publisher: |
Publisher:
Physikalisch-Technische Bundesanstalt (PTB)
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Rights: |
Rights:
Download for personal/private use only, if your national copyright law allows this kind of use.
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Dates: |
Dates:
Available: 2020-03-13 |
File: |
File:
Download File
(application/pdf)
3.69 MB (3869958 Bytes)
MD5 Checksum: fa6dca694261d11cdd11e9afe9880991 SHA256 Checksum: ae858c16250e7a4f3f5460b61922965935984089d603c2c345d488ff5ffdfcd6 |
Keywords: |
Keywords:
HCl-dTDLAS ;
boundary layer ;
temperature gradient ;
gas matrix
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Abstract: |
Abstract:
European Directives are coming into force setting increasingly stringent Emission Limit Values (ELVs) for key air pollutants and regulating emissions from combustion processes. Accurate meas-urement of emissions to the atmosphere is vital to control and reduce air pollution. Optical methods offer promising tools to investigate the dynamic release of molecular species from combustion envi-ronments. The IMPRESS 2 project [1] goes beyond state of the art in measuring the emissions of critical pollutants (e.g. HCl) with lower ELVs.
Tunable diode laser absorption spectroscopy (TDLAS) [2-4] is frequently applied in combustion research and industry for sampling-free and in situ gas analysis [5], but its application is normally limited to uniform conditions along the line-of-sight (LOS). However, in many applications, for ex-ample, combustion diagnostic measurements, heterogeneities (e.g. temperature, gas matrix) along the LOS may occur. In those conditions, the effects of heterogeneities should be considered for spectral fitting and concentration quantification [6]. A direct TDLAS (dTDLAS) based HCl spectrometer [7] has been developed in PTB recently. Here, the key point of this presentation is a better understanding of the effects of spatial gas matrix heter-ogeneity on the absolute accuracy of this spectrometer. A simulation model will be used here to ana-lyze the effects of spatial heterogeneities on dTDLAS HCl concentration measurement. This work was supported by IMPRESS2 within the EMPIR. |
Citation: |
Citation:
Qu, Zhechao ; Nwaboh, Javis ; Werhahn, Olav ; Ebert, Volker. Effects of the spatial heterogeneity of gas matrix and thermal boundary layers on absolute TDLAS HCl measurements in hot flue gases, 2020. Physikalisch-Technische Bundesanstalt (PTB). DOI: https://doi.org/10.7795/810.20200309
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