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A kind of columnar coconut shell activated carbon and preparation method thereof

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

Active Publication Date: 2017-05-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional preparation method, related patents also involve a lot. Patent CN 1528510A discloses a kind of wooden vehicle granular activated carbon 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 has high strength and specific surface area, but the mesoporosity is not high. , and in the field of catalysis, there is a higher requirement for the strength of shaped activated carbon. At the same time, a higher microporosity is not suitable as a catalyst carrier, and a higher mesoporosity can further promote the progress of catalysis. Therefore, the invention of a Shaped activated carbon with high strength and high mesoporosity is particularly important

Method used

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  • A kind of columnar coconut shell activated carbon and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Soak the clean coconut shell in 5 wt% sulfuric acid solution for 15 h, wash and dry; then crush the coconut shell with a pulverizer and pass through a 150-mesh sieve; take 50 g of coconut shell powder for later use, and select the organic binder from field Cyanine powder, the addition amount is 4 g, add phosphoric acid, the mass ratio of phosphoric acid and coconut shell powder is selected as 1.5:1, the water amount is controlled at 15 g, and soaked at 40°C for 2 hours; after mixing evenly, start kneading, set the time for 30 minutes, and then set Molding was carried out in the extruder, and then the columnar material was solidified and shaped in an oven at 150 °C for 1 hour, and then the material was put into an atmosphere furnace for carbonization and activation. Ar gas atmosphere was used, the flow rate was controlled at 300 mL / min, and the final temperature was set at 300 mL / min. Set at 500°C and activate at constant temperature for 1h. After rinsing the activated c...

Embodiment 2

[0024] After soaking the clean coconut shell in 10 wt% hydrochloric acid solution for 10 h, wash and dry it; then crush it with a pulverizer and pass through a 150-mesh sieve; take 50 g for later use, the organic binder is polyvinyl alcohol, and the addition amount is 4 g, add phosphoric acid, the mass ratio of phosphoric acid to coconut shell powder is 1:1, the water volume is controlled to 15 g, soak at 30°C for 3 hours, after mixing evenly, start kneading, set the time for 30 minutes, and then place it in the extruder After molding, the columnar material was solidified and shaped in an oven at 130°C for 3 hours, and then the material was put into an atmosphere furnace for carbonization and activation. Ar gas atmosphere was used, the flow rate was controlled at 400 mL / min, and the final temperature was set at 700°C. Activate for 1h. After rinsing the activated columnar carbon, the pH value is 6~7, and then drying to obtain the sample. The parameters are shown in the table be...

Embodiment 3

[0026] After soaking the clean coconut shell in 1wt% strong acid solution for 20h, wash and dry; then pulverize with a pulverizer, and pass through a 150-mesh sieve; take 50 g for later use, and the organic binder is selected from kale 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 and coconut shell is selected as 1:1, the water volume is controlled at 15 g, and soaked at 50°C for 1 hour; after mixing evenly, start kneading, time Set it up for 30 minutes, then place it in the extruder for molding, then the columnar material is cured and shaped in an oven at 50°C for 3 hours, and then put the material into the atmosphere furnace for carbonization activation, using Ar gas atmosphere, and the flow rate is controlled at 300 mL / min , the final temperature was set at 1100°C, and the constant temperature activation was performed for 1 hour. After rinsing the activated columnar carb...

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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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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/324C01B32/342
Inventor 倪军詹勇林建新林炳裕江莉龙
Owner FUZHOU UNIV
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