Off-gassing reduction of stored wood pellets by adding acetylsalicylic acid
| Autor: | Irene Sedlmayer, Waltraud Bauer-Emhofer, Elisabeth Wopienka, Walter Haslinger, Hermann Hofbauer, Christoph Schmidl |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Antioxidant
Chemistry 020209 energy General Chemical Engineering medicine.medical_treatment Pellets Energy Engineering and Power Technology 02 engineering and technology Pelletizing Pulp and paper industry Outgassing Laboratory flask chemistry.chemical_compound Fuel Technology 020401 chemical engineering visual_art Carbon dioxide 0202 electrical engineering electronic engineering information engineering medicine visual_art.visual_art_medium Sawdust 0204 chemical engineering Carbon monoxide |
| Zdroj: | Fuel Processing Technology. 198:106218 |
| ISSN: | 0378-3820 |
| DOI: | 10.1016/j.fuproc.2019.106218 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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