Fast pyrolysis of biomass: An experimental study on mechanisms influencing yield and composition of the products

E. Hoekstra

Research output: ThesisPhD Thesis - Research UT, graduation UTAcademic

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Abstract

Pyrolysis oil originating from biomass has the potential to replace ‘crude fossil oil’ and to produce fuels and chemicals in a more sustainable way. The favorable perspective of fast pyrolysis as biomass pre-treatment step is directly related to the production of a liquid as main product and the significantly higher density of the oil (~1200 kg/m3) compared to the original biomass (~150 kg/m3). The resulting transportation and storage benefits leads to the concept of small decentralized fast pyrolysis plants for production of oil to be transported to a central processing plant. Despite the large number of studies, the understanding of the chemical reactions and physical processes occurring in the fast pyrolysis process is limited. The same holds for the influence of reaction conditions on the yield and composition of the products. Alleged process requirements to obtain high oil yields are recently challenged in literature, based on experimental evidence. At the moment information to make a reliable science based process design of a pyrolysis unit is lacking. This thesis provides clarification in two areas: First, the initial decomposition reactions in the converting biomass in combination with the transport out of the particles of the decay fragments are studied. Secondly, the homogeneous and heterogeneous reactions of the vapors (including aerosols) are investigated.
Original languageEnglish
Awarding Institution
  • University of Twente
Supervisors/Advisors
  • van Swaaij, Willibrordus P.M., Supervisor
  • Kersten, Sascha R.A., Supervisor
  • Hogendoorn, J.A., Co-Supervisor
Award date11 Nov 2011
Place of PublicationEnschede
Publisher
Print ISBNs978-90-365-3262-4
DOIs
Publication statusPublished - 11 Nov 2011

Fingerprint

pyrolysis
experimental study
oil
biomass
chemical reaction
product
fossil
decomposition
liquid

Keywords

  • EC Grant Agreement nr.: FP6/518312
  • BIOCOUP

Cite this

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Fast pyrolysis of biomass : An experimental study on mechanisms influencing yield and composition of the products. / Hoekstra, E.

Enschede : University of Twente, 2011. 184 p.

Research output: ThesisPhD Thesis - Research UT, graduation UTAcademic

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AB - Pyrolysis oil originating from biomass has the potential to replace ‘crude fossil oil’ and to produce fuels and chemicals in a more sustainable way. The favorable perspective of fast pyrolysis as biomass pre-treatment step is directly related to the production of a liquid as main product and the significantly higher density of the oil (~1200 kg/m3) compared to the original biomass (~150 kg/m3). The resulting transportation and storage benefits leads to the concept of small decentralized fast pyrolysis plants for production of oil to be transported to a central processing plant. Despite the large number of studies, the understanding of the chemical reactions and physical processes occurring in the fast pyrolysis process is limited. The same holds for the influence of reaction conditions on the yield and composition of the products. Alleged process requirements to obtain high oil yields are recently challenged in literature, based on experimental evidence. At the moment information to make a reliable science based process design of a pyrolysis unit is lacking. This thesis provides clarification in two areas: First, the initial decomposition reactions in the converting biomass in combination with the transport out of the particles of the decay fragments are studied. Secondly, the homogeneous and heterogeneous reactions of the vapors (including aerosols) are investigated.

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