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Upgrading of fast pyrolysis bio-oils to renewable hydrocarbons using slurry- and fixed bed hydroprocessing
RISE Research Institutes of Sweden, Bioeconomy and Health, Biorefinery and Energy.ORCID iD: 0000-0001-5147-7499
Chalmers University of Technology, Sweden.
RISE Research Institutes of Sweden, Bioeconomy and Health, Chemical Process and Pharmaceutical Development.ORCID iD: 0009-0000-6482-3178
RISE Research Institutes of Sweden, Bioeconomy and Health, Chemical Process and Pharmaceutical Development.ORCID iD: 0000-0002-8849-234x
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2024 (English)In: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 253, article id 108009Article in journal (Refereed) Published
Abstract [en]

Liquefaction of lignocellulosic biomass through fast pyrolysis, to yield fast pyrolysis bio-oil (FPBO), is a technique that has been extensively researched in the quest for finding alternatives to fossil feedstocks to produce fuels, chemicals, etc. Properties such as high oxygen content, acidity, and poor storage stability greatly limit the direct use of this bio-oil. Furthermore, high coking tendencies make upgrading of the FPBO by hydrodeoxygenation in fixed-bed bed hydrotreaters challenging due to plugging and catalyst deactivation. This study investigates a novel two-step hydroprocessing concept; a continuous slurry-based process using a dispersed NiMo-catalyst, followed by a fixed bed process using a supported NiMo-catalyst. The oil product from the slurry-process, having a reduced oxygen content (15 wt%) compared to the FPBO and a comparatively low coking tendency (TGA residue of 1.4 wt%), was successfully processed in the downstream fixed bed process for 58 h without any noticeable decrease in catalyst activity, or increase in pressure drop. The overall process resulted in a 29 wt% yield of deoxygenated oil product (0.5 wt% oxygen) from FPBO with an overall carbon recovery of 68%.

Place, publisher, year, edition, pages
Elsevier B.V. , 2024. Vol. 253, article id 108009
Keywords [en]
Biofuel, Deoxygenation, Hydroprocessing, Pyrolysis, Renewable, Slurry, Biofuels, Catalyst deactivation, Fuel storage, Oxygen, Deoxygenations, Fast pyrolysis bio-oil, Fixed bed, Fixed-bed process, Lignocellulosic biomass, Ni-Mo catalyst, Oil product, Oxygen content, Catalyst activity
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:ri:diva-71914DOI: 10.1016/j.fuproc.2023.108009Scopus ID: 2-s2.0-85179611112OAI: oai:DiVA.org:ri-71914DiVA, id: diva2:1839817
Funder
Swedish Energy Agency, 41253-2
Note

 Correspondence Address: N. Bergvall; Research Institutes of Sweden AB, Borås, Box 857, SE-501 15, Sweden; This work was funded by the Swedish Energy Agency, project number 41253-2

Available from: 2024-02-22 Created: 2024-02-22 Last updated: 2024-05-17Bibliographically approved

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Bergvall, NiklasBernlind, ChristianBernlind, AlexandraSandström, Linda

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