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Effects of Pyrolysis Conditions and Ash Formation on Gasification Rates of Biomass Char
Umeå University, Sweden.
Umeå University, Sweden.
Umeå University, Sweden.
RISE - Research Institutes of Sweden, Bioeconomy, ETC Energy Technology Center.
Show others and affiliations
2017 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 31, no 6, p. 6507-6514Article 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
2017. Vol. 31, no 6, p. 6507-6514
Keywords [en]
Pyrolysis, Thermogravimetric analysis, Ash composition, Ash-forming elements, Char gasification, Char reactivity, Gasification reactivity, High heating rates, Isothermal thermogravimetry, Pyrolysis temperature, Gasification
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-30874DOI: 10.1021/acs.energyfuels.7b00688Scopus ID: 2-s2.0-85021216054OAI: oai:DiVA.org:ri-30874DiVA, id: diva2:1139007
Funder
Swedish Energy Agency
Note

 Funding details: Energimyndigheten; Funding text: We gratefully acknowledge financial support from the Swedish Gasification Centre, SFC, funded by the Swedish Energy Agency, and from the Kempe foundations. We also thank Bio4Energy, a strategic research environment appointed by the Swedish government, for supporting this work.

Available from: 2017-09-06 Created: 2017-09-06 Last updated: 2018-07-05Bibliographically approved

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Wiinikka, Henrik

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