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Upgrading of fast pyrolysis bio-oils to renewable hydrocarbons using slurry- and fixed bed hydroprocessing
RISE Research Institutes of Sweden, Bioekonomi och hälsa, Bioraffinaderi och energi.ORCID-id: 0000-0001-5147-7499
Chalmers University of Technology, Sweden.
RISE Research Institutes of Sweden, Bioekonomi och hälsa, Kemiska processer och läkemedel.ORCID-id: 0009-0000-6482-3178
RISE Research Institutes of Sweden, Bioekonomi och hälsa, Kemiska processer och läkemedel.ORCID-id: 0000-0002-8849-234x
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2024 (engelsk)Inngår i: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 253, artikkel-id 108009Artikkel i tidsskrift (Fagfellevurdert) 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%.

sted, utgiver, år, opplag, sider
Elsevier B.V. , 2024. Vol. 253, artikkel-id 108009
Emneord [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
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Identifikatorer
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
Forskningsfinansiär
Swedish Energy Agency, 41253-2
Merknad

 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

Tilgjengelig fra: 2024-02-22 Laget: 2024-02-22 Sist oppdatert: 2024-05-17bibliografisk kontrollert

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Bergvall, NiklasBernlind, ChristianBernlind, AlexandraSandström, Linda

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