A method for preparing hierarchically porous activated carbon using leaves as templates

A technology of porous activated carbon and leaves, applied in the field of preparation of multi-level porous activated carbon, can solve the problems of chemical residues, high preparation cost, environmental pollution, etc.

Inactive Publication Date: 2019-12-03
WUHAN UNIV OF SCI & TECH
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  • Description
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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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  • A method for preparing hierarchically porous activated carbon using leaves as templates

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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 hierarchically porous activated carbon using leaves as templates. The technical solution is to use leaves as templates and heavy asphalt as carbon source to prepare hierarchical porous activated carbon by coupling template method and controlled thermal decomposition-partial water vapor activation method, so that leaves can retain their original structure during carbonization and decomposition. And the asphalt in the melt flow state can imprint into the microstructure of the leaves, forming a trans structure with the microstructure of the leaves. The activated carbon prepared by the invention has obvious characteristics of multi-level pores, and the pore size distribution curve presents obvious double peaks, wherein the percentage of micropores is 14.9-34.9%, and the percentage of mesopores is 65.0-85.0%. The leaf-template coupling process of the invention prepares the multi-level porous activated carbon, which can overcome the disadvantages of high activator cost, equipment corrosion, environmental pollution, product residual chemicals and the like in the traditional activated carbon preparation process.

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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Patent Type & Authority Patents(China)
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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