Columnar cocoanut shell activated carbon and preparation method thereof

A technology of coconut shell activated carbon and activated carbon, which is applied in the field of columnar coconut shell activated carbon and its preparation, can solve the problem of low mesoporosity and achieve the effect of high strength and high mesoporosity

Active Publication Date: 2015-05-20
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the traditional preparation method, related patents also involve a lot. Patent CN 1528510A discloses a kind of granular activated carbon for wooden vehicles and its preparation method. The method does not add binder, and the mesoporosity can reach more than 60%. The strength of charcoal reaches 85%. Patent CN103058186A discloses a method for preparing granular activated carbon from sawdust. Also without adding a binder, the resulting granular carbon ha

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  • Columnar cocoanut shell activated carbon and preparation method thereof

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Example Embodiment

[0021] Example 1

[0022] Soak the clean coconut shell in a 5 wt% sulfuric acid solution for 15 hours, then wash and dry; then crush the coconut shell with a grinder and pass through a 150-mesh sieve; take 50 g coconut shell powder for later use, and use the organic binder Cyan powder, add 4 g, add phosphoric acid, the mass ratio of phosphoric acid to coconut shell powder is 1.5:1, the amount of water is controlled to 15 g, soak at 40℃ for 2h; after mixing uniformly, start kneading, set the time for 30min, then set Forming in the extruder, then the columnar material is solidified and shaped in an oven at 150℃ for 1h, and then the material is put into an atmosphere furnace for carbonization and activation, using Ar atmosphere, flow control at 300 mL / min, and final temperature setting Set it to 500°C and activate at constant temperature for 1 hour. The activated columnar carbon is rinsed, the pH value is 6~7, and the sample is obtained after drying. The parameters are shown in the...

Example Embodiment

[0023] Example 2

[0024] Soak the clean coconut shell in a 10 wt% hydrochloric acid solution for 10 hours, then wash and dry; then crush it with a grinder and pass through a 150-mesh sieve; take 50 g for use, and use polyvinyl alcohol as the organic binder. 4 g, add phosphoric acid, the mass ratio of phosphoric acid to coconut shell powder is 1:1, the amount of water is controlled to 15 g, soak at 30℃ for 3h, after mixing uniformly, start kneading, set the time for 30min, and then place it in the extruder After forming, the columnar materials are cured and shaped in an oven at 130°C for 3 hours, and then the materials are put into an atmosphere furnace for carbonization and activation. The Ar atmosphere is adopted, the flow is controlled at 400 mL / min, the final temperature is set to 700°C, and the temperature is constant. Activate for 1h. The activated columnar carbon is rinsed, the pH value is 6~7, and the sample is obtained after drying. The parameters are shown in the tabl...

Example Embodiment

[0025] Example 3

[0026] Soak the clean coconut shell in a 1wt% strong acid solution for 20 hours, then wash and dry; then crush with a grinder, and then pass through a 150-mesh sieve; take 50 g for use. The organic binder is made of sesame powder and polyvinyl alcohol. The mixing mass ratio is 1:1, and the addition amount is 4g; then add phosphoric acid, the mass ratio of phosphoric acid to coconut shell component is 1:1, the water amount is controlled to 15g, soak at 50℃ for 1h; after mixing uniformly, start kneading, time Set for 30min, then place it in an extruder for forming, then the columnar material is cured and shaped in an oven at 50℃ for 3h, then the material is put into an atmosphere furnace for carbonization activation, using Ar atmosphere, flow control at 300 mL / min , The final temperature is set to 1100 ℃, constant temperature activation 1h. The activated columnar carbon is rinsed, the pH value is 6~7, and the sample is obtained after drying. The parameters are ...

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Abstract

The invention provides columnar cocoanut shell activated carbon with high strength and high mesoporosity and a preparation method of the columnar cocoanut shell activated carbon. The columnar cocoanut shell activated carbon has the side pressure of 210N/cm, the strength of larger than or equal to 95% and the mesoporosity of 70-90%. The preparation method of the columnar cocoanut shell activated carbon comprises the steps of crushing and sieving pretreated cocoanut shells; uniformly mixing wood powder with a certain particle size and a specific organic binder; adding phosphoric acid and a proper amount of water according to a certain phosphorus/wood ratio; and sequentially dipping, kneading, carrying out extrusion molding, curing, carbonizing, activating, washing and drying to obtain the columnar cocoanut shell activated carbon. Through condition control, the columnar cocoanut shell activated carbon has the specific surface area of 900-1600 m<2>/g, the pore volume of 0.4-0.8 cm<3>/g and the mesoporosity of 70-90% within a certain high-strength range, and the controllability is also one of the advantages of the columnar cocoanut shell activated carbon. Due to the adoption of a porous structure with high strength and high mesoporosity, the columnar cocoanut shell activated carbon can be used as a solid catalyst in a fixed bed reactor and is wide in application prospect in the catalysis field.

Description

technical field [0001] The invention belongs to the field of preparation of activated carbon materials, and in particular relates to a columnar coconut shell activated carbon and a preparation method thereof. Background technique [0002] Due to the messy and irregular arrangement of carbon atoms in the plane layer of activated carbon into a "helical structure", and they are all combined with each other by intermolecular force, the wear resistance and compressive strength of activated carbon are very poor. At the same time, activated carbon, as a catalyst carrier, is more and more used in the field of catalysis, and shaped activated carbon with a certain strength and pore structure is increasingly valued by people. [0003] The preparation of shaped activated carbon can generally be divided into two categories: one is to prepare shaped activated carbon from carbonaceous precursors, and the other is to directly prepare shaped activated carbon from powdered activated carbon as...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 倪军詹勇林建新林炳裕江莉龙
Owner FUZHOU UNIVERSITY
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