Method for gasifying biomass
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsThierry Chataing, Gilles Ratel, Thomas Robin
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Abstract
Gasification method comprising the following steps of: a) bringing, in a main reactor, beads made of steel, an alloy, glass or ceramic, at a temperature between 600° C. and 1,000° C., into contact with a feedstock mixture comprising water and a biomass, the biomass comprising an organic part and salts, the main reactor being pressurised to more than 224 bar and at a temperature above 200° C. b) gasifying the organic part in the presence of the beads, thereby forming a gaseous phase, an aqueous phase and a solid residue, and whereby the salts precipitate on the beads, forming a salt shell covering the beads, c) separating the beads from the organic part, d) regenerating the beads.
Claims15
A method for gasifying biomass comprising the steps of:
- a) in a main reactor, bringing beads that have been pre-heated to a temperature between 600° C. and 1,000° C. into contact with a feedstock mixture comprising water and a biomass, the biomass comprising an organic part and salts,
- wherein the beads are made of a material that is selected from steel, a metal alloy, glass or a ceramic,
- and wherein the main reactor is pressurised to more than 222 bar;
- b) at least partially gasifying the organic part, in the presence of the beads at a temperature above 374° C. and at a pressure above 222 bar, thereby forming a gaseous phase, an aqueous phase and a solid residue, and whereby the salts precipitate on the beads, forming a salt shell covering the beads;
- c) separating the beads covered by the salt shell from any recoverable organic part;
- and
- d) regenerating the beads.
Dependencies are inferred from the claim text.