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Effect of fast pyrolysis conditions on biomass solid residues at high temperatures
Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads Bygning 229, Kgs. Lyngby 2800, Denmark.
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2016 (English)In: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 143, p. 118-129Article in journal (Refereed) Published
Abstract [en]

Fast pyrolysis of wood and straw was conducted in a drop tube furnace (DTF) and compared with corresponding data from a wire mesh reactor (WMR) to study the influence of temperature (1000-1400)°C, biomass origin (pinewood, beechwood, wheat straw, alfalfa straw), and heating rate (103 °C/s, 104 °C/s) on the char yield and morphology. Scanning electron microscopy (SEM), elemental analysis, and ash compositional analysis were applied to characterize the effect of operational conditions on the solid residues (char, soot) and gaseous products. The char yield from fast pyrolysis in the DTF setup was 3 to 7% (daf) points lower than in the WMR. During fast pyrolysis pinewood underwent drastic morphological transformations, whereas beechwood and straw samples retained the original porous structure of the parental fuel with slight melting on the surface. The particle size of Danish wheat straw char decreased in its half-width with respect to the parental fuel, whereas the alfalfa straw char particle size remained unaltered at higher temperatures. Soot particles in a range from 60 to 300 nm were obtained during fast pyrolysis. The soot yield from herbaceous fuels was lower than from wood samples, possibly due to differences in the content of lignin and resin acids.

Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2016. Vol. 143, p. 118-129
Keywords [en]
Fast pyrolysis, Drop tube furnace, Wire mesh reactor, Soot, CAMSIZER XT
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:umu:diva-134512DOI: 10.1016/j.fuproc.2015.11.002ISI: 000369455300014OAI: oai:DiVA.org:umu-134512DiVA, id: diva2:1093854
Available from: 2017-05-08 Created: 2017-05-08 Last updated: 2018-06-09Bibliographically approved

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Trubetskaya, Anna

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CiteExportLink to record
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Citation style
  • apa
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  • de-DE
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