Preparation method of monodisperse large size carbon ball

Abstract

The invention belongs to the field of chemical industry and specifically relates to a preparation method of monodisperse large size carbon ball. The invention takes liquid urea resin as precursor material, prepares stable micron urea resin emulsion with uniform size by glass membrane emulsification method, conducting emulsification at room temperature, pressure of disperse phase being 0.2-0.5 MPa, concentration of emulsifier in aqueous phase being 0.1-1.0wt%, concentration of ammonium chloride being 0.05-0.5mol / L, and concentration of PVA being 0.1-0.5wt%; after emulsification, stirring 2 hours, curing urea resin under catalysis of ammonium chloride completely, precipitating cured urea resin from aqueous phase; separating settled resin particles, drying and carbonizing at high temperaturein argon gas. The sizes of the carbon balls prepared by the invention are uniform, and the grain diameter of the carbon ball is adjustable within 10-80mm by changing aperture of SPG membrane or pressure of disperse phase during the emulsification. The invention has simple technique and low cost.

Description

technical field

[0001] The invention belongs to the field of chemical industry, and in particular relates to a method for preparing micron-scale porous monodisperse large-size carbon spheres with high specific surface area and uniform size. The porous carbon spheres can be applied to the fields of adsorption, catalysis, electrode materials and the like. Background technique

[0002] Porous carbon materials have been paid close attention to due to their wide application value in gas separation, water purification, catalysis, chromatographic analysis, energy storage, etc. At present, the synthesis methods of spherical carbon materials include chemical vapor deposition, plasma deposition, catalytic pyrolysis and arc method.

[0003] Chinese patent CN200510047804.8 discloses a method for preparing pyrolytic carbon spheres. The carbon source liquid is injected into the reactor. Under the action of the gas flow, the carbon source liquid is volatilized and brought to the constant ...

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