Catalytic wood liquefaction using a hydrogen donor solvent

Authors

  • Paulo E. Araya,

    1. Department of Chemical Engineering, Faculty of Physical and Mathematical Sciences, University of Chile, Casilla 2777, Santiago, Chile
    Search for more papers by this author
  • Sergio E. Droguett,

    1. Department of Chemical Engineering, Faculty of Physical and Mathematical Sciences, University of Chile, Casilla 2777, Santiago, Chile
    Search for more papers by this author
  • Heinz J. Neuburg,

    1. Department of Chemical Engineering, Faculty of Physical and Mathematical Sciences, University of Chile, Casilla 2777, Santiago, Chile
    Search for more papers by this author
  • Ricardo Badilla-Ohlbaum

    Corresponding author
    1. Department of Chemical Engineering, Faculty of Physical and Mathematical Sciences, University of Chile, Casilla 2777, Santiago, Chile
    • Department of Chemical Engineering, Faculty of Physical and Mathematical Sciences, University of Chile, Casilla 2777, Santiago, Chile Badilla-Ohlbaum
    Search for more papers by this author

Abstract

Direct wood liquefaction of pine sawdust (Pinus radiata) in a hydrogen donor solvent (tetralin), was studied in a 0.5 L autoclave using Co-Mo/γ-Al2O3 and Pt/γ-Al2O3 supported catalysts. Uncatalyzed as well as Raney Nickel catalyzed runs were also performed for comparison purposes. Reaction temperature was kept at 673 K and total system pressure at 10 MPa in all cases. Weight ratio of solvent to solid loaded was 2:1, the gas phase being either H2 or N2. Independent runs were also performed with cellulose and lignin which are the main wood constituents. Reaction products were characterized by means of gas chromatography and solvent fractionation using specific solvents.

Abstract

La liquéfaction directe de la sciure de bois de pin (Pinus radiata) dans un solvant donneur d'hydrogène (tétraline) a été étudiée dans un autoclave de 0,5 L en présence de catalyseurs supportés Co-Mo/γ-Al2O3 et Pt/γ-Al2O3. Nous avons également effectué des essais sans catalyseurs et des essais avec le nickel de Raney comme catalyseur, à des fins de comparaisons. La température de réaction a été maintenue à 673 K et la pression totale du système à 10 MPa dans tous les essais. Le rapport en poids du solvant aux solides chargés est de 2/1, la phase gazeuse étant composée soit de H2 soit de N2. Des essais séparés ont également eté effectués avec la cellulose et la lignine, les principaux constituents du bois. Les produits de la réaction ont été caractérisés par chromatographic en phase gazeuse et par fractionnement au solvant en utilisant des solvants spécifiques.

Ancillary