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Design and validation of an advanced entrained flow reactor system for studies of rapid solid biomass fuel particle conversion and ash formation reactions
Thermochemical Energy Conversion Laboratory, Department of Applied Physics and Electronics, Umeå University.ORCID iD: 0000-0001-5074-4233
Thermochemical Energy Conversion Laboratory, Department of Applied Physics and Electronics, Umeå University.ORCID iD: 0000-0003-3096-1999
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. Thermochemical Energy Conversion Laboratory, Department of Applied Physics and Electronics, Umeå University.ORCID iD: 0000-0002-5777-9241
Thermochemical Energy Conversion Laboratory, Department of Applied Physics and Electronics, Umeå University.ORCID iD: 0000-0003-1095-9154
2018 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 89, no 6, article id 065101Article in journal (Refereed) Published
Abstract [en]

The design and validation of a newly commissioned entrained flow reactor is described in the present paper. The reactor was designed for advanced studies of fuel conversion and ash formation in powder flames, and the capabilities of the reactor were experimentally validated using two different solid biomass fuels. The drop tube geometry was equipped with a flat flame burner to heat and support the powder flame, optical access ports, a particle image velocimetry (PIV) system for in situ conversion monitoring, and probes for extraction of gases and particulate matter. A detailed description of the system is provided based on simulations and measurements, establishing the detailed temperature distribution and gas flow profiles. Mass balance closures of approximately 98% were achieved by combining gas analysis and particle extraction. Biomass fuel particles were successfully tracked using shadow imaging PIV, and the resulting data were used to determine the size, shape, velocity, and residence time of converting particles. Successful extractive sampling of coarse and fine particles during combustion while retaining their morphology was demonstrated, and it opens up for detailed time resolved studies of rapid ash transformation reactions; in the validation experiments, clear and systematic fractionation trends for K, Cl, S, and Si were observed for the two fuels tested. The combination of in situ access, accurate residence time estimations, and precise particle sampling for subsequent chemical analysis allows for a wide range of future studies, with implications and possibilities discussed in the paper.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2018. Vol. 89, no 6, article id 065101
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-69223DOI: 10.1063/1.5030603ISI: 000437195200054Scopus ID: 2-s2.0-85048128383OAI: oai:DiVA.org:ltu-69223DiVA, id: diva2:1215348
Note

Validerad;2018;Nivå 2;2018-06-08 (andbra)

Available from: 2018-06-08 Created: 2018-06-08 Last updated: 2018-08-10Bibliographically approved

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Skoglund, Nils

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