Method for preparing hollow carbon structure using cracking reaction of heavy hydrocarbon fraction
The present invention relates to a method of preparing a hollow carbon structure. The method includes a step of calcining a solid component separated after a cracking reaction of a heavy hydrocarbon fraction; and a step of performing an acid treatment or base treatment on the solid component calcined in the above-described step. The present invention provides a method of preparing a hollow carbon structure which may be used to separate carbon dioxide, to remove a sulfur compound, and as a carrier of various substances by performing various pre-processes on carbon generated on a surface of a spent catalyst which is used in a cracking reaction of a heavy hydrocarbon fraction.
1. A method of producing a hollow carbon structure, the method comprising:
a step of calcining a solid component which includes a residue of a heavy hydrocarbon fraction, a carbonaceous material generated during a reaction, and a spent catalyst separated after a cracking reaction of a heavy hydrocarbon fraction; and
a step of performing an acid treatment or base treatment on the solid component calcined in the above-described step.
2. The method of claim 1 , wherein the cracking reaction of the heavy hydrocarbon fraction includes a step of performing a cracking reaction of the heavy hydrocarbon fraction by controlling internal conditions of a reactor having a hydrocarbon solvent, the heavy hydrocarbon fraction, and a catalyst contained therein to be in a supercritical or subcritical state; and
a step of separating a liquid oil fraction and a solid component generated by the cracking reaction.
3. The method of claim 2 , wherein the heavy hydrocarbon fraction is a vacuum residue, crude oil, an atmospheric residue, a residue of a hydrogenation reaction, or oil sand.
4. The method of claim 2 , wherein the hydrocarbon solvent is dodecane, xylene, tetralin, or a mixture thereof.
5. The method of claim 2 , wherein the catalyst is a metal-based or non-metal-based oxide catalyst.
6. The method of claim 1 , wherein a step of cleaning and drying the solid component is performed before the step of calcining the solid component.
7. The method of claim 1 , wherein the calcining is performed at 550 to 650° C. for 1 to 12 hours.
8. The method of claim 1 , wherein the acid treatment or base treatment is performed for 6 to 20 hours using a solution including an acid or base and distilled water at a volume ratio of 1:1 to 1:5.
9. The method of claim 1 , comprising a step of secondarily calcining the solid component subjected to the acid or base treatment.
10. The method of claim 9 , wherein the secondarily calcining is performed at 700 to 1,200° C. for 1 to 12 hours.