Process for direct hydorliquefaction of biomass comprising two stages of ebullating bed hydroconversion
First Claim
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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Accused Products
Abstract
A process for direct 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 comprising two successive hydroconversion stages under high hydrogen pressure in ebullating bed reactors. Hydroconversion takes place in the presence of a supported catalyst of the type for hydroconversion of petroleum residue and a suspension composed of the biomass and a solvent, preferably a hydrogen donor solvent and preferably recycled from the process. The biomass can undergo a pretreatment of drying and/or roasting and/or grinding and/or demineralization prior to hydroliquefaction.
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Citations
23 Claims
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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 comprising
a) 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- C. and 440°
Specification