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Experimental studies on a two-step fast pyrolysis-catalytic hydrotreatment process for hydrocarbons from microalgae (Nannochloropsis gaditana and Scenedesmus almeriensis)
Priharto, N.; Ronsse, F.; Prins, W.; Carleer, R.; Heeres, H.J. (2020). Experimental studies on a two-step fast pyrolysis-catalytic hydrotreatment process for hydrocarbons from microalgae (Nannochloropsis gaditana and Scenedesmus almeriensis). Fuel Processing Technology 206: 106466. https://hdl.handle.net/10.1016/j.fuproc.2020.106466
In: Fuel Processing Technology. ELSEVIER SCIENCE BV: Amsterdam. ISSN 0378-3820; e-ISSN 1873-7188, meer
Peer reviewed article  

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Trefwoorden
    Marien/Kust; Zoet water
Author keywords
    Microalgae; Fast pyrolysis; Catalytic hydrotreatment; Deoxygenation; Hydrotreated oils

Auteurs  Top 
  • Carleer, R.
  • Heeres, H.J.

Abstract
    Two microalgae species (marine Nannochloropsis gaditana, and freshwater Scenedesmus almeriensis) were subjected to pyrolysis followed by a catalytic hydrotreatment of the liquid products with the objective to obtain liquid products enriched in hydrocarbons. Pre-dried microalgae were pyrolyzed in a mechanically stirred fluidized bed reactor (380 and 480 °C) with fractional condensation. The heavy phase pyrolysis oils were hydrotreated (350 °C and 15 MPa of H2 pressure for 4 h) using a NiMo on alumina catalyst. The pyrolysis liquids after pyrolysis and those after catalytic hydrotreatment were analyzed in detail using GC–MS, GC × GC–MS, and 2D HSQC NMR. The liquid products are enriched in aromatics and aliphatic hydrocarbons and, as such have a considerably lower oxygen content (1.6–4.2% w/w) compared to the microalgae feeds (25–30% w/w). The overall carbon yield for the liquid products was between 15.6 and 19.1% w/w based on the initial carbon content of the algae feedstock.

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