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Method for preparing hierarchical porous activated carbon from leaf as template

A technology of porous activated carbon and leaves is applied in the field of preparing multi-level porous activated carbon, which can solve the problems of impurity of carbon materials, environmental pollution, chemical residues, etc.

Inactive Publication Date: 2018-06-22
WUHAN UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

Washing the template with strong acid is expensive to prepare, and the process is easy to cause environmental pollution, and it will also cause residues of chemicals to make the prepared carbon material impure

Method used

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  • Method for preparing hierarchical porous activated carbon from leaf as template

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Embodiment

[0027] A method for preparing hierarchically porous activated carbon with leaves as a template, comprising the following steps:

[0028] Step 1. First wash the fresh camphor leaves with distilled water, dry them, and cut them into pieces, then mix the cut leaves with distilled water at a mass ratio of 1:1, put them into the cooking machine, and start the cooking machine for 30 minutes to prepare Slurry material, then move the slurry material into the tube furnace, raise the temperature to 350°C at a rate of 0.5°C / min under nitrogen protection atmosphere, then cool down naturally to room temperature under nitrogen protection atmosphere, take out the carbonized product and grind it with 200 mesh sieves are screened, and the charcoal powder under the sieve is the prepared leaf charcoal;

[0029] Step 2. Mix the leaf charcoal prepared in step 1 with heavy traffic petroleum asphalt at a mass ratio of 3:1, then add a cosolvent, and stir at 30°C for 8 hours to prepare a carbonization...

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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 ...

Claims

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Application Information

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IPC IPC(8): C01B32/318C01B32/336
Inventor 张春桃梅姝婷童仕唐
Owner WUHAN UNIV OF SCI & TECH
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