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Process for direct hydorliquefaction of biomass comprising two stages of ebullating bed hydroconversion

  • US 8,623,102 B2
  • Filed: 01/11/2011
  • Issued: 01/07/2014
  • Est. Priority Date: 01/12/2010
  • Status: Active Grant
First Claim
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1. Process for hydroliquefaction of biomass selected from algae, lignocellulosic biomass and/or of one or more constituents of lignocellulosic biomass selected from the group comprising cellulose, hemicellulose and/or lignin for producing fuel bases comprisinga) a stage of preparation of a suspension of particles of biomass in a solvent,b) a first stage of hydroconversion in the presence of hydrogen of said suspension in at least one reactor containing an ebullating bed catalyst and operating at a temperature comprised between 300°

  • C. and 440°

    C., at a total pressure comprised between 15 and 25 MPa, at an hourly mass velocity comprised between 0.1 and 5 h

    1
    and at a hydrogen/feed ratio comprised between 0.1 and 2 Nm3/kg,c) a second stage of hydroconversion in the presence of hydrogen of at least a proportion of effluent obtained in stage b) in at least one reactor containing an ebullating bed catalyst and operating at a temperature comprised between 350°

    C. and 470°

    C., at a total pressure comprised between 15 and 25 MPa, at an hourly mass velocity comprised between 0.1 and 5 h

    1
    and a hydrogen/feed ratio comprised between 0.1 and 2 Nm3/kg, and wherein the temperature of the second hydroconversion stage is at least 10°

    C. higher than that of the first hydroconversion stage.

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