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High-speed interferometric measurement and visualization of the conversion of a black liquor droplet during laser heating
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0003-4879-8261
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0001-8355-2414
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.
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2012 (English)In: Optics and lasers in engineering, ISSN 0143-8166, E-ISSN 1873-0302, Vol. 50, no 11, p. 1654-1661Article in journal (Refereed) Published
Abstract [en]

Black liquor is a mix of organic and inorganic materials that is left after the kraft pulping process. In a modern pulp mill the pulping chemicals and the energy in the black liquor is recovered and used in the pulping cycle by burning the black liquor in a recovery burner. An alternative to the recovery boiler is to gasify the black liquor to produce an energy rich synthesis gas that can be upgraded into synthetic fuels or chemicals. Characterization of black liquor has mostly been done under conditions that are relevant for recovery boilers but the conditions in a gasifier differ significantly from this. In particular the droplets are much smaller and the heating rates are much higher. This paper presents an optical interferometric technique that has the potential to produce data under relevant conditions for gasification. In the paper, results are measured at atmospheric conditions and with relatively low heating rate. However, the method can be applied also for pressurized conditions and at heating rates that are only limited by the frame rate of the digital camera that is used to capture the transient event when the droplets are heated. In the paper the dynamic properties of the gas ejected from and the swelling during conversion of a single droplet are measured

Place, publisher, year, edition, pages
2012. Vol. 50, no 11, p. 1654-1661
National Category
Fluid Mechanics and Acoustics Applied Mechanics Energy Engineering
Research subject
Fluid Mechanics; Experimental Mechanics; Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-10207DOI: 10.1016/j.optlaseng.2012.05.001ISI: 000307620900021Scopus ID: 2-s2.0-84864287158Local ID: 8f8423fe-791c-4f6d-a520-149558104cfbOAI: oai:DiVA.org:ltu-10207DiVA, id: diva2:983147
Note
Validerad; 2012; 20120806 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Lycksam, HenrikSjödahl, MikaelGren, PerÖhman, MarcusGebart, Rikard

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