Standard liquid fuel for industrial boilers from used wood

Christian Lindfors (Corresponding Author), Anja Oasmaa, Alexi Välimäki, Taina Ohra-aho, Henna Punkkinen, Cyril Bajamundi, Kristin Onarheim

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The purpose of the research was to validate if the fast pyrolysis bio-oil (FPBO) from used wood would meet both the specifications set by the standard EN 16900–2017 for use of FPBO in industrial boilers and REACH requirements. Commercial used wood Class C was used for fast pyrolysis. The dominant material groups in the feedstock were (virgin) wood (58%) and chemically treated wood (41%). The contents of heavy metals and plastics were low. The pyrolysis experiments were carried out in a bench scale bubbling fluidized bed reactor (1 kg/h). Organic liquid yields were lower (42 − 47%) than with sawdust (64%) but at the same level with those from stored forest residues (46%). The lower organic liquid yield was partly caused by the ash in the feedstock. The liquid product had a high water mass fraction, which resulted in a spontaneous phase separation. The phases were mixed together, and a part of water was evaporated at 40 °C to obtain a single phase product with a water mass fraction of 21%. The liquid product was a homogenous fluid, which in most cases met the demands of the EN standard and the specifications for REACH. Thermodynamic equilibrium calculation suggests that fluidized bed combustion of the pyrolysis char may increase the risk of corrosion and ash melting problems. The recycled wood case is self-sufficient in terms of heat and energy input to the process and will produce excess electricity and district heating for export.

Original languageEnglish
Article number105265
JournalBiomass and Bioenergy
Volume127
DOIs
Publication statusE-pub ahead of print - 19 Jun 2019
MoE publication typeA1 Journal article-refereed

Fingerprint

Liquid fuels
pyrolysis
Boilers
Wood
Ashes
Pyrolysis
liquid
liquids
fluidized beds
Liquids
feedstocks
Feedstocks
water mass
ash
industrial oils
Specifications
heat
Water
Sawdust
Fluidized bed combustion

Keywords

  • Bio-oil
  • Fast pyrolysis
  • Used wood

Cite this

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title = "Standard liquid fuel for industrial boilers from used wood",
abstract = "The purpose of the research was to validate if the fast pyrolysis bio-oil (FPBO) from used wood would meet both the specifications set by the standard EN 16900–2017 for use of FPBO in industrial boilers and REACH requirements. Commercial used wood Class C was used for fast pyrolysis. The dominant material groups in the feedstock were (virgin) wood (58{\%}) and chemically treated wood (41{\%}). The contents of heavy metals and plastics were low. The pyrolysis experiments were carried out in a bench scale bubbling fluidized bed reactor (1 kg/h). Organic liquid yields were lower (42 − 47{\%}) than with sawdust (64{\%}) but at the same level with those from stored forest residues (46{\%}). The lower organic liquid yield was partly caused by the ash in the feedstock. The liquid product had a high water mass fraction, which resulted in a spontaneous phase separation. The phases were mixed together, and a part of water was evaporated at 40 °C to obtain a single phase product with a water mass fraction of 21{\%}. The liquid product was a homogenous fluid, which in most cases met the demands of the EN standard and the specifications for REACH. Thermodynamic equilibrium calculation suggests that fluidized bed combustion of the pyrolysis char may increase the risk of corrosion and ash melting problems. The recycled wood case is self-sufficient in terms of heat and energy input to the process and will produce excess electricity and district heating for export.",
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Standard liquid fuel for industrial boilers from used wood. / Lindfors, Christian (Corresponding Author); Oasmaa, Anja; Välimäki, Alexi; Ohra-aho, Taina; Punkkinen, Henna; Bajamundi, Cyril; Onarheim, Kristin.

In: Biomass and Bioenergy, Vol. 127, 105265, 19.06.2019.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Lindfors, Christian

AU - Oasmaa, Anja

AU - Välimäki, Alexi

AU - Ohra-aho, Taina

AU - Punkkinen, Henna

AU - Bajamundi, Cyril

AU - Onarheim, Kristin

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