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Comparison of Measurement Techniques for Temperature and Soot Concentration in Premixed, Small-Scale Burner Flames
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Energivetenskap.ORCID-id: 0000-0002-6473-7090
RISE-Energy Technology Center AB .
Umeå University, Thermochemical Energy Conversion Laboratory, Department of Applied Physics and Electronics.
Umeå University, Thermochemical Energy Conversion Laboratory, Department of Applied Physics and Electronics.
Vise andre og tillknytning
2017 (engelsk)Inngår i: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 31, nr 10, s. 11328-11336Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Optical and intrusive measurement techniques for temperature and soot concentration in hot reacting flows were tested on a small-scale burner in fuel-rich, oxygen-enriched atmospheric flat flames produced to simulate the environment inside an entrained flow reactor. The optical techniques comprised two-color pyrometry (2C-PYR), laser extinction (LE), and tunable diode laser absorption spectroscopy (TDLAS), and the intrusive methods included fine-wire thermocouple thermometry (TC) and electrical low pressure impactor (ELPI) particle analysis. Vertical profiles of temperature and soot concentration were recorded in flames with different equivalence and O2/N2 ratios. The 2C-PYR and LE data were derived assuming mature soot. Gas temperatures up to 2200 K and soot concentrations up to 3 ppmv were measured. Close to the burner surface, the temperatures obtained with the pyrometer were up to 300 K higher than those measured by TDLAS. Further away from the burner, the difference was within 100 K. The TC-derived temperatures were within 100 K from the TDLAS results for most of the flames. At high signal-to-noise ratio and in flame regions with mature soot, the temperatures measured by 2C-PYR and TDLAS were similar. The soot concentrations determined with 2C-PYR were close to those obtained with LE but lower than the ELPI results. It is concluded that the three optical techniques have good potential for process control applications in combustion and gasification processes. 2C-PYR offers simpler installation and 2D imaging, whereas TDLAS and LE provide better accuracy and dynamic range without calibration procedures.

sted, utgiver, år, opplag, sider
American Chemical Society (ACS), 2017. Vol. 31, nr 10, s. 11328-11336
HSV kategori
Forskningsprogram
Energiteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-65767DOI: 10.1021/acs.energyfuels.7b01168ISI: 000413710300104Scopus ID: 2-s2.0-85032857034OAI: oai:DiVA.org:ltu-65767DiVA, id: diva2:1143717
Merknad

Validerad;2017;Nivå 2;2017-11-09 (andbra)

Tilgjengelig fra: 2017-09-22 Laget: 2017-09-22 Sist oppdatert: 2019-04-04bibliografisk kontrollert
Inngår i avhandling
1. Improving the efficiency of entrained flow gasifiers by real time in-situ diagnostics and burner design
Åpne denne publikasjonen i ny fane eller vindu >>Improving the efficiency of entrained flow gasifiers by real time in-situ diagnostics and burner design
2019 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Alternativ tittel[sv]
Optimering av suspensionsförgasare med hjälp av laserdiagnostik och brännardesign
sted, utgiver, år, opplag, sider
Luleå: Luleå University of Technology, 2019. s. 110
Serie
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
HSV kategori
Forskningsprogram
Energiteknik
Identifikatorer
urn:nbn:se:ltu:diva-73406 (URN)978-91-7790-348-2 (ISBN)978-91-7790-349-9 (ISBN)
Disputas
2019-06-14, E231, Luleå, 10:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2019-04-04 Laget: 2019-04-03 Sist oppdatert: 2019-05-17bibliografisk kontrollert

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