Abstract
The purpose of the research was to validate if the fast pyrolysis bio-oil (FPBO) from used wood would meet the specifications set by the standard EN 16900-2017 for industrial boilers. Commercial used wood Class C was used for fast pyrolysis. According to physical characterization studies, the dominant material groups were (virgin) wood (i.e. no visible coatings) (58 wt%) and chemically treated wood (41 wt%). The share of plastics was 0.7 wt%. The contents of heavy metals were not significant. No bromine was observed and the content of chlorine was ≤0.05 wt%. Prior pyrolysis studies, the sample was grinded, dried, and sieved. Plastic fraction was separated to over 0.98 mm sieve fraction. The main fraction having particle size of 0.55 − 0.98 mm containing wood was tested in one experiment and a mixture of plastic fraction (over 0.98 mm) and wood fraction (0.55 − 0.98 mm) was tested in two other experiments. The fines below 0.55 mm were removed; Pb was found only in this finest fraction. The pyrolysis experiments were carried out in a bench scale bubbling fluidized bed reactor (1 kg/h). Organic yields were lower (42 − 47 wt%) than with sawdust (62 wt%) but at the same level than those with stored forest residues (46 wt%). The side products char and gases are combusted for process energy in commercial integrated process. The liquid product had a high water content, which resulted in a spontaneous phase separation. The phases were mixed together, and a part of water was gently removed to obtain a single phase product with a water content of 21 wt%. The liquid product was a homogenous fluid, which in most cases met the demands of the EN standard and hence can be used in industrial boilers. All product met the specifications for REACH.
Original language | English |
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Title of host publication | Proceedings of European Biomass Conference and Exhibition, EUBCE 2018 |
Publisher | ETA-Florence Renewable Energies |
Pages | 1030-1034 |
Number of pages | 5 |
ISBN (Electronic) | 978-88-89407-18-9 |
DOIs | |
Publication status | Published - 1 May 2018 |
MoE publication type | B3 Non-refereed article in conference proceedings |
Event | 26th European Biomass Conference and Exhibition, EUBCE 2018 - Bella center, Copenhagen, Denmark Duration: 14 May 2018 → 17 May 2018 |
Conference
Conference | 26th European Biomass Conference and Exhibition, EUBCE 2018 |
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Abbreviated title | EUBCE 2018 |
Country/Territory | Denmark |
City | Copenhagen |
Period | 14/05/18 → 17/05/18 |
Keywords
- Pyrolysis
- Pyrolysis oil
- Used wood