| Titel: | Effects of the spatial heterogeneity of gas matrix and thermal boundary layers on absolute TDLAS HCl measurements in hot flue gases |
| Autoren: |
Qu, Zhechao, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.4, Analytische Chemie der Gasphase Nwaboh, 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 |
| Beitragende: | HostingInstitution: Physikalisch-Technische Bundesanstalt (PTB), ISNI: 0000 0001 2186 1887 |
| Seiten: | 1 |
| Sprache: | en |
| DOI: | 10.7795/810.20200309 |
| Art der Ressource: | Text / Poster |
| Herausgeber: | Physikalisch-Technische Bundesanstalt (PTB) |
| Rechte: | Download for personal/private use only, if your national copyright law allows this kind of use. |
| Daten: |
Verfügbar: 2020-03-13 |
| Datei: |
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| Schlagworte | HCl-dTDLAS ; boundary layer ; temperature gradient ; gas matrix |
| Zusammenfassung: | 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. |
| Zitierform: | 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 |