Method for preparing nitrogen-doped porous carbon from heavy organic component in coal liquefaction residue

The invention provides a method for preparing nitrogen-doped porous carbon from a heavy organic component in a coal liquefaction residue, which belongs to the field of preparation technology for carbon materials. The method comprises the following steps: subjecting the coal liquefaction residue to solvent extraction so as to obtain a heavy organic component; mixing the obtained component with a nitrogen source and carrying out preoxidation treatment so as to obtain a nitrogen-rich carbon source; and with the nitrogen-rich carbon source as a raw material, preparing the nitrogen-containing porous carbon with a high specific area by respectively using physical activation, chemical activation or a template method. The method provided by the invention has the characteristics of simple process, a wide selection range of the nitrogen source and the like and provides a novel approach for high-added value utilization of the coal liquefaction residue. The prepared nitrogen-doped porous carbon can be extensively used in fields like electrode materials, adsorption materials and catalyst carriers.