Off-gassing reduction of stored wood pellets by adding acetylsalicylic acid

Document identifier: oai:DiVA.org:ltu-76608
Access full text here:10.1016/j.fuproc.2019.106218
Keyword: Engineering and Technology, Mechanical Engineering, Energy Engineering, Teknik och teknologier, Maskinteknik, Energiteknik, Antioxidant, Storage, Emission, Carbon monoxide, Volatile organic compounds, Aspirin
Publication year: 2020
Relevant Sustainable Development Goals (SDGs):
SDG 3 Good health and wellbeingSDG 13 Climate actionSDG 6 Clean water and sanitation
The SDG label(s) above have been assigned by OSDG.ai

Abstract:

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.

Authors

Irene Sedlmayer

BEST – Bioenergy and Sustainable Technologies GmbH, Graz, Austria. Technische Universität Wien, Institute of Chemical, Environmental and Bioscience Engineering, Vienna, Austria
Other publications >>

Waltraud Bauer-Emhofer

BEST – Bioenergy and Sustainable Technologies GmbH, Graz, Austria
Other publications >>

Walter Haslinger

Luleå tekniska universitet; Energivetenskap; BEST – Bioenergy and Sustainable Technologies GmbH, Graz, Austria.
Other publications >>

Hermann Hofbauer

Technische Universität Wien, Institute of Chemical, Environmental and Bioscience Engineering, Vienna, Austria
Other publications >>

Christoph Schmidl

BEST – Bioenergy and Sustainable Technologies GmbH, Graz, Austria
Other publications >>

Elisabeth Wopienka

BEST – Bioenergy and Sustainable Technologies GmbH, Graz, Austria
Other publications >>

Record metadata

Click to view metadata