Method for preparing hierarchical porous activated carbon from leaf as template

Abstract

The invention relates to a method for preparing hierarchical porous activated carbon from a leaf as a template. According to the technical scheme of the method, hierarchical porous activated carbon isprepared from the leaf as the template and heavy duty bitumen as a carbon source with a template coupling method and a thermal decomposition control-partial steam activation method, so that an original structure of the leaf can be reserved in a carbonized decomposition process while bitumen in a melt flowing state can enter the microstructure of the leaf through imprinting and a trans-form structure of the microstructure of the leaf is formed. Activated carbon prepared with the method has obvious hierarchical pore characteristics, a pore diameter distribution curve shows obvious double peaks,micropore percentage is 14.9%-34.9%, and mesopore percentage is 65.0%-85.0%. According to the leaf template coupling technology for preparing hierarchical porous activated carbon, defects that an activating agent in a traditional activated carbon preparation technology is high in cost, corrodes equipment and pollutes environment, a product has chemical residues and the like can be overcome.

Description

technical field

[0001] The invention belongs to the technical field of active carbon preparation. In particular, it relates to a method for preparing hierarchically porous activated carbon using leaves as templates. Background technique

[0002] Due to its huge specific surface area, developed pore structure, chemical stability and thermal stability, activated carbon has been widely used in many fields such as reducing industrial pollution, supercapacitors, catalyst carriers, and biomedical engineering. Petroleum heavy-duty asphalt is a non-energy product with a large output in petroleum production, and its application potential is great. It is generally used for paving roads, waterproofing and moisture-proofing buildings, etc. If petroleum asphalt is used as a carbon source for the preparation of activated carbon, it will not only expand the market demand for petroleum asphalt, increase its utilization rate, but also increase its added value.

[0003] Hierarchical porous ...

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