Carbon microparticle having lignin as raw material and preparation method therefor

摘要

A method for preparing a carbon microparticle from an organic raw material having lignin as a main constituent, wherein an aqueous solution with 5% total concentration of lignin and sodium hydroxide (the proportion in mass is 1:0.5) is spray-dried to prepare a complex microparticle. This complex microparticle is heat-processed under nitrogen atmosphere at 600° C. for one hour and cooled. Thereafter, this is washed with water and further dried to prepare a hollow carbon microparticle such as those shown in FIG. 2 (b). The prepared carbon microparticle is light-weight and has an equivalent specific surface area to commercially available activated charcoal.

主权项

1. A hollow carbon microparticle preparation method, comprising:
providing an aqueous solution of an organic raw material having lignin as a main constituent; turning the aqueous solution 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. to prepare a hollow carbon microparticle.