Carbon material and production method therefor
AssigneeNippon Steel Engineering Co., Ltd.
InventorsEiichiroh Mori, Kenichi Sekimoto, Sugura Takeda, Yukio Kowaki
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Abstract
A biomass-derived carbon material is provided, the carbon material having a carbon content of 60 to 75% by weight and an integrated heat of oxidation reaction of 5 kJ/kg or less when maintained in air at 107° C. for 20 minutes. A method for producing a carbon material is provided, the method including: a carbonization step of obtaining biomass chars having a carbon content of 61 to 75% by weight from biomass; and an oxidation step of heating the biomass chars to 200° C. or higher in an atmosphere having an oxygen concentration of 2 to 13% by volume.
Claims16
A method for producing a carbon material, the method comprising:
- a carbonization step of obtaining biomass chars having a carbon content of 61 to 75% by weight from biomass;
- and
- an oxidation step of heating the biomass chars to 200° C. or higher and lower than 300° C. in an atmosphere having an oxygen concentration of 2 to 13% by volume to obtain the carbon material.
A method for producing a carbon material, the method comprising:
- a carbonization step of obtaining biomass chars having a carbon content of 61% by weight or more from biomass;
- and
- an oxidation step of heating the biomass chars to 200° C. or higher in an atmosphere having an oxygen concentration of 2 to 13% by volume
- wherein in the carbonization step, the biomass is carbonized and then fractionated into first biomass chars and second biomass chars having a lower carbon content than the first biomass chars, and
- wherein in the oxidation step, the first biomass chars are heated.
A method for producing a carbon material, the method comprising:
- a carbonization step of obtaining biomass chars having a carbon content of 61 to 75% by weight from biomass;
- and
- an oxidation step of heating the biomass chars to 200° C. or higher in an atmosphere having an oxygen concentration of 2 to 13% by volume;
- wherein in the carbonization step, the biomass is carbonized and then fractionated into first biomass chars and second biomass chars having a lower carbon content than that of the first biomass chars, and
- wherein in the oxidation step, the first biomass chars are heated.
Dependencies are inferred from the claim text.