Carbon microparticle having lignin as raw material and preparation method therefor

A carbon microparticle preparation method,

• wherein a mixed solution of an organic raw material having lignin as a main constituent and an inorganic substance is turned into a micro-droplet, the micro-droplet is dried to prepare a microparticle, and the microparticle is thermally decomposed in a range of 300° C. to 1200° C. to prepare a carbon microparticle.

A carbon microparticle preparation method,

• wherein a mixed solution of organic raw materials having lignin as a main constituent and a basic compound is turned into a micro-droplet, the micro-droplet is dried to prepare a microparticle, and the microparticle is thermally decomposed in a range of 300° C. to 1200° C. and the specific surface area is increased to prepare a carbon microparticle.

A carbon microparticle preparation method,

• wherein preprocessing to raise the constituent ratio of lignin is carried out on a pulp waste solution,
• the pulp waste solution after the preprocessing is turned into a micro-droplet, the micro-droplet is dried to prepare a microparticle, and the microparticle is thermally decomposed in a range of 300° C. to 1200° C. to prepare a carbon microparticle.

A carbon microparticle preparation method,

• wherein preprocessing to raise the constituent ratio of lignin is carried out on a pulp waste solution,
• a solution comprising the pulp waste solution after the preprocessing added with an inorganic substance is turned into a micro-droplet, the micro-droplet is dried to prepare a microparticle, and the microparticle is thermally decomposed in a range of 300° C. to 1200° C. to prepare a carbon microparticle.

A hollow carbon microparticle, which is obtained by turning a solution of lignin, or lignin and an inorganic substance into a micro-droplet, drying the micro-droplet to prepare a microparticle, and thermally decomposing the microparticle in a range of 300° C. to 1200° C.

A hollow carbon microparticle, which is obtained by turning a solution of lignin, or lignin and a basic compound into a micro-droplet, drying the micro-droplet to prepare a microparticle, and thermally decomposing the microparticle in a range of 300° C. to 1200° C.,

• wherein the hollow carbon microparticle has an external diameter of 0.2 to 50 μm and a carbon wall thickness of 0.05 to 20 μm.

A hollow carbon microparticle, which is obtained by turning a solution of lignin as well as a metal compound constituted by one or more species selected from the group consisting of an oxide, a hydroxide, a carbonate and a halide of a metal into a micro-droplet, drying the micro-droplet to prepare a microparticle, and thermally decomposing the microparticle in a range of 300° C. to 1200° C.,

• wherein the hollow carbon microparticle has an external diameter of 0.2 to 50 μm, a carbon wall thickness of 5 to 200 nm and a bulk density of 3 to 20 g/L.

A hollow carbon microparticle, which is obtained by turning a solution of lignin and metasilicate into a micro-droplet, drying the micro-droplet to prepare a microparticle, and thermally decomposing the microparticle in a range of 300° C. to 1200° C.,

• wherein the hollow carbon microparticle has an external diameter of 0.2 to 50 μm and a carbon wall thickness of 0.05 to 20 μm, and wherein the carbon wall thereof is constituted by a carbon nanopipe having an external diameter of 5 to 50 nm and a carbon wall thickness of 1 to 5 nm.

A hollow, non-graphite carbon microparticle, which is obtained by turning a solution of lignin and orthosilicate into a micro-droplet, drying the micro-droplet to prepare a microparticle, and thermally decomposing the microparticle in a range of 300° C. to 1200° C.,

• wherein the hollow, non-graphite carbon microparticle has an external diameter of 3 to 30 nm, a carbon wall thickness of 1 to 5 nm and a specific surface area of 1400 to 1600 m2/g.