Upgrading of fast pyrolysis bio-oils to renewable hydrocarbons using slurry- and fixed bed hydroprocessing

Bergvall, NiklasRISE,Bioraffinaderi och energi,RISE Research Institutes of Sweden (författare)

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
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%.

Cheah, You Wayne,1993Chalmers University of Technology, Sweden,Chalmers tekniska högskola(Swepub:cth)cheah (författare)
Bernlind, ChristianRISE,Kemiska processer och läkemedel,RISE Research Institutes of Sweden(Swepub:ri)christianbe@ri.se (författare)
Bernlind, AlexandraRISE,Kemiska processer och läkemedel,RISE Research Institutes of Sweden(Swepub:ri)AlexandraBe@ri.se (författare)
Olsson, Louise,1974Chalmers University of Technology, Sweden,Chalmers tekniska högskola(Swepub:cth)louisej (författare)
Creaser, Derek,1966Chalmers University of Technology, Sweden,Chalmers tekniska högskola(Swepub:cth)creaser (författare)
Sandström, LindaRISE,Bioraffinaderi och energi,RISE Research Institutes of Sweden(Swepub:ri)LindaSa@ri.se (författare)
Öhrman, Olov GWPreem,Preem AB,Preem AB, Sweden (författare)
RISEBioraffinaderi och energi (creator_code:org_t)

Av författaren/redakt...: Bergvall, Niklas; Cheah, You Wayne ...; Bernlind, Christ ...; Bernlind, Alexan ...; Olsson, Louise, ...; Creaser, Derek, ...; visa fler...; Sandström, Linda; Öhrman, Olov GW; visa färre...

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