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Off-gassing reduction of stored wood pellets by adding acetylsalicylic acid
BEST – Bioenergy and Sustainable Technologies GmbH, Graz, Austria. Technische Universität Wien, Institute of Chemical, Environmental and Bioscience Engineering, Vienna, Austria.
BEST – Bioenergy and Sustainable Technologies GmbH, Graz, Austria.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. BEST – Bioenergy and Sustainable Technologies GmbH, Graz, Austria. .
Technische Universität Wien, Institute of Chemical, Environmental and Bioscience Engineering, Vienna, Austria.
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2020 (English)In: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 198, article id 106218Article in journal (Refereed) Published
Abstract [en]

During transportation and storage of wood pellets various gases are formed leading to toxic atmosphere. Various influencing factors and measures reducing off-gassing have already been investigated. The present study aims at applying an antioxidant, acetylsalicylic acid (ASA), to reduce off-gassing from wood pellets by lowering wood extractives oxidation. Therefore, acetylsalicylic acid was applied in industrial and laboratory pelletizing processes. Pine and spruce sawdust (ratio 1:1) were pelletized with adding 0-0.8% (m/m) ASA. Glass flasks measurements confirmed off-gassing reduction by adding ASA for all wood pellets investigated.The biggest effect was achieved by adding 0.8% (m/m) ASA in the industrial pelletizing experiments where the emission of volatile organic compounds (VOCtot) was reduced by 82% and a reduction of carbon monoxide (CO) and carbon dioxide (CO2) emissions by 70% and 51%, respectively, could be achieved. Even an addition of 0.05% (m/m) ASA led to off-gassing reduction by >10%. A six week storage experiment to investigate the long-term effectivity of ASA addition revealed, that antioxidant addition was effective in reducing CO-, CO2- and VOCtot-release, especially during the first four weeks of the storage experiment, after which time the relative reduction effect was significantly decreased.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 198, article id 106218
Keywords [en]
Antioxidant, Storage, Emission, Carbon monoxide, Volatile organic compounds, Aspirin
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-76608DOI: 10.1016/j.fuproc.2019.106218ISI: 000501613900003OAI: oai:DiVA.org:ltu-76608DiVA, id: diva2:1367656
Note

Validerad;2019;Nivå 2;2019-11-04 (johcin)

Available from: 2019-11-04 Created: 2019-11-04 Last updated: 2020-02-25Bibliographically approved

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