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Laser-Based, Optical, and Traditional Diagnostics of NO and Temperature in 400 kW Pilot-Scale Furnace
RISE Research Institutes of Sweden, Bioeconomy and Health, Biorefinery and Energy.ORCID iD: 0000-0003-2253-6845
LKAB, Sweden.
RISE Research Institutes of Sweden, Bioeconomy and Health, Biorefinery and Energy.ORCID iD: 0000-0002-6473-7090
RISE Research Institutes of Sweden, Bioeconomy and Health, Biorefinery and Energy.ORCID iD: 0000-0002-9395-9928
2021 (English)In: Applied Sciences, E-ISSN 2076-3417, Vol. 11, no 15, article id 7048Article in journal (Refereed) Published
Abstract [en]

A fast sensor for simultaneous high temperature (above 800 K) diagnostics of nitrogen oxide (NO) concentration and gas temperature (T) based on the spectral fitting of low-resolution NO UV absorption near 226 nm was applied in pilot-scale LKAB’s Experimental Combustion Furnace (ECF). The experiments were performed in plasma and/or fuel preheated air at temperatures up to 1550 K, which is about 200 K higher than the maximal temperature used for the validation of the developed UV NO sensor previously. The UV absorption NO and T measurements are compared with NO probe and temperature measurements via suction pyrometry and tuneable diode laser absorption (TDL) using H2O transitions at 1398 nm, respectively. The agreement between the NO UV and NO probe measurements was better than 15%. There is also a good agreement between the temperatures obtained using laser-based, optical, and suction pyrometer measurements. Comparison of the TDL H2O measurements with the calculated H2O concentrations demonstrated an excellent agreement and confirms the accuracy of TDL H2O measurements (better than 10%). The ability of the optical and laser techniques to resolve various variations in the process parameters is demonstrated.

Place, publisher, year, edition, pages
2021. Vol. 11, no 15, article id 7048
Keywords [en]
NO UV absorption, temperature, TDLAS, pilot-scale furnace
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:ri:diva-55657DOI: 10.3390/app11157048OAI: oai:DiVA.org:ri-55657DiVA, id: diva2:1583107
Available from: 2021-08-05 Created: 2021-08-05 Last updated: 2024-03-03Bibliographically approved

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Sepman, AlexeyÖgren, YngveWiinikka, Henrik

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