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Cogasification of Crude Glycerol and Black Liquor Blends: Char Morphology and Gasification Kinetics
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.ORCID iD: 0000-0003-1095-9154
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2017 (English)In: Energy Technology, ISSN 2194-4288, Vol. 5, no 8, p. 1272-1281Article in journal (Refereed) Published
Abstract [en]

In this study, we assessed the feasibility of black liquor/glycerol blends as a potential gasification feedstock. The char gasification reactivity and kinetics were studied at T=750, 800, 850, and 900 degrees C for 20 and 40% blends of glycerol with black liquor. Three qualities of glycerol were used including two industrial-grade crude glycerols. The gasification rates were similar for all blends; therefore, the alkali-metal catalysis is also sufficient for the char blends (alkali/C atomic ratio between 0.45 and 0.55). The blends with the most impure glycerol (containing K) had the lowest activation energies (approximate to 120 kJ mol(-1)) and reaction times for char gasification and, therefore, had fuel properties suitable for gasification. The char particles from different blends showed surface morphologies similar to those of black liquor chars with an even surface distribution of alkali elements. A loss of alkali (mainly K) from the fuel blends during pyrolysis indicated the necessity to perform gas-phase studies of alkali release. Overall, these results encourage the use of glycerol as a potential gasification feedstock for catalytic-gasification-based biorefineries.

Place, publisher, year, edition, pages
2017. Vol. 5, no 8, p. 1272-1281
Keywords [en]
alkali metals, biomass, gasification, glycerol, kinetics
National Category
Bioenergy
Identifiers
URN: urn:nbn:se:umu:diva-139012DOI: 10.1002/ente.201600569ISI: 000407591200020OAI: oai:DiVA.org:umu-139012DiVA, id: diva2:1139001
Available from: 2017-09-06 Created: 2017-09-06 Last updated: 2018-06-09Bibliographically approved

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Broström, Markus

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
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  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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