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Effects of pyrolysis conditions and ash formation on gasification rates of biomass char
Umeå University, Department of Applied Physics and Electronics, Thermochemical Energy Conversion Laboratory.
Umeå University, Department of Applied Physics and Electronics, Thermochemical Energy Conversion Laboratory.
Umeå University, Department of Applied Physics and Electronics, Thermochemical Energy Conversion Laboratory.
RISE Energy Technology Center.
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2017 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 31, no 6, 6507-6514 p.Article in journal (Refereed) Published
Abstract [en]

Pyrolysis conditions and the presence of ash-forming elements significantly influence char properties and its oxidation or gasification reactivity. In this study, intrinsic gasification rates of char from high heating rate pyrolysis were analyzed with isothermal thermogravimetry. The char particles were prepared from two biomasses at three size ranges and at two temperatures. Reactivity dependence on original particle size was found only for small wood particles that had higher intrinsic char gasification rates. Pyrolysis temperature had no significant effect on char reactivity within the range tested. Observations of ash formation highlighted that reactivity was influenced by the presence of ash-forming elements, not only at the active char sites but also through prohibition of contact between char and gasification agent by ash layer formation with properties highly depending on ash composition.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017. Vol. 31, no 6, 6507-6514 p.
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-63402DOI: 10.1021/acs.energyfuels.7b00688OAI: oai:DiVA.org:ltu-63402DiVA: diva2:1096328
Note

Validerad;2017;Nivå 2;2017-06-15 (rokbeg)

Available from: 2017-05-17 Created: 2017-05-17 Last updated: 2017-06-15Bibliographically approved

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