Method of producing carbon-enriched biomass material
AssigneeArbaflame Technology AS
InventorsRune Brusletto, Mike Kleinert
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Abstract
The present invention provides a carbon-enriched biomass material, a method of producing the carbon-enriched biomass material, and a method for using the carbons-enriched biomass material. A lignocellulosic material is used as a starting material and is treated at elevated temperatures under partially oxidizing conditions in a reaction vessel which is isolated from the environment. The carbon enriched biomass can be used in domestic or industrial combustion processes.
Claims28
A method of producing carbon-enriched biomass material, comprising the steps of:
- (i) providing lignocellulosic material as starting material,
- (ii) subjecting said starting material to a treatment at temperatures in the range of from 120° C. to 320° C. in the presence of a substoichiometric amount of oxygen at a concentration of O2 or O2 equivalents in the range of 0.15-0.45 mol/kg dried lignocellulosic material in a sealed reaction vessel at absolute pressures in the range of 2 to 100 bar, wherein no gases are removed during the reaction,
- (iii) opening of said reaction vessel, and
- (iv) obtaining carbon-enriched biomass material.
A method for combusting a carbon-enriched biomass material, comprising grinding the carbon-enriched biomass material and combusting the material in a dust firing system, wherein said carbon-enriched biomass material is obtainable using a method comprising
- (i) providing lignocellulosic material as starting material,
- (ii) subjecting said starting material to treatment at temperatures in the range of from 120° C. to 320° C. in the presence of a substoichiometric amount of oxygen at a concentration of O2 or O2 equivalents in the range of 0.15-0.45 mol/kg dried lignocellulosic material in a sealed reaction vessel, at absolute pressures in the range of from 2 to 100 bar, wherein no gases are removed during the reaction,
- (iii) opening of said reaction vessel, and
- (iv) obtaining carbon-enriched biomass material wherein the concentration of HMF, FU, aldehydes, phenol and/or phenol derivatives amounts to less than 20 mg/m3.
Carbon-enriched biomass material obtainable according to a method comprising the steps of:
- (i) providing lignocellulosic material as starting material, (ii) subjecting said starting material to a treatment at temperatures in the range of from 120° C. to 320° C. in the presence of a substoichiometric amount of oxygen at a concentration of O2 or O2 equivalents in the range of 0.15-0.45 mol/kg dried lignocellulosic material, in a sealed reaction vessel, at absolute pressures in the range of from 2 to 100 bar wherein no gases are removed during the reaction, (iii) opening of said reaction vessel, and (iv) obtaining carbon-enriched biomass material, wherein the concentration of HMF, FU, aldehydes, phenol and/or phenol derivatives amounts to less than 20 mg/m3.
Dependencies are inferred from the claim text.