Hierarchical porous activated carbon prepared from paper mill sludge composite kawo kawo fibers and preparation method of hierarchical porous activated carbon

A technology of kapok fiber and papermaking sludge, which is applied in the field of materials, can solve the problems of low specific gravity of kapok fiber, inability to be effectively utilized, and low yield of activated carbon, and achieve excellent adsorption rate, wide pore size distribution, and convenient implementation.

Inactive Publication Date: 2019-05-24
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low specific gravity of kapok fiber, the yield of activated carbon is low and cannot be effectively utilized.

Method used

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  • Hierarchical porous activated carbon prepared from paper mill sludge composite kawo kawo fibers and preparation method of hierarchical porous activated carbon
  • Hierarchical porous activated carbon prepared from paper mill sludge composite kawo kawo fibers and preparation method of hierarchical porous activated carbon
  • Hierarchical porous activated carbon prepared from paper mill sludge composite kawo kawo fibers and preparation method of hierarchical porous activated carbon

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Cut the kapok fiber irregularly to a dispersed state and mix it with papermaking sludge for 15 minutes until the mixing degree is uniform to obtain composite sludge; the kapok fiber has a hollowness of 90% and a length of about 250 μm; papermaking The moisture content of the sludge is 20%, and the particle size range is about 3mm; the composite volume ratio of sludge and kapok is 2:1;

[0035] (2) Send the composite sludge into the rotary dryer for drying, take it out and stir it and cut it properly; send it into the dryer again for drying until it is completely dry, take it out and pulverize it for use;

[0036] (3) According to the mass ratio of composite sludge to anhydrous sodium carbonate of 4:1, add the dried and pulverized composite sludge obtained in step (3) into anhydrous sodium carbonate solution, mix well and form a muddy impregnation 12h, drying at 110°C for 12h to obtain flocculated composite sludge;

[0037] (4) Feed the flocculated composite sludge ...

Embodiment 2

[0043] (1) Cut the kapok fiber irregularly to a dispersed state and mix it with papermaking sludge for 20 minutes until the mixing degree is uniform to obtain composite sludge; the kapok fiber has a hollowness of 95% and a length of about 500 μm; papermaking The moisture content of the sludge is 15%, and the particle size range is about 2mm; the composite volume ratio of sludge and kapok is 4:1;

[0044] (2) Send the composite sludge into the rotary dryer for drying, take it out and stir it and cut it properly; send it into the dryer again for drying until it is completely dry, take it out and pulverize it for use;

[0045] (3) According to the mass ratio of composite sludge to anhydrous sodium carbonate of 5:1, add the dried and pulverized composite sludge obtained in step (3) into anhydrous sodium carbonate solution, mix well and form a muddy impregnation 14h, drying at 120°C for 10h to obtain flocculated composite sludge;

[0046] (4) Send the flocculated composite sludge ...

Embodiment 3

[0051] (1) Cut the kapok fiber irregularly to a dispersed state and mix it with papermaking sludge for 10 minutes until the mixing degree is uniform to obtain composite sludge; the kapok fiber has a hollowness of 85% and a length of about 50 μm; papermaking The moisture content of the sludge is 20%, and the particle size range is about 5mm; the composite volume ratio of sludge and kapok is 4:1;

[0052] (2) Send the composite sludge into the rotary dryer for drying, take it out and stir it and cut it properly; send it into the dryer again for drying until it is completely dry, take it out and pulverize it for use;

[0053] (3) According to the mass ratio of composite sludge to anhydrous sodium carbonate of 5:1, add the dried and pulverized composite sludge obtained in step (3) into anhydrous sodium carbonate solution, mix well and form a muddy impregnation 14h, drying at 120°C for 10h to obtain flocculated composite sludge;

[0054] (4) Send the flocculated composite sludge i...

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Abstract

The invention discloses hierarchical porous activated carbon prepared from paper mill sludge composite kawo kawo fibers and a preparation method of the hierarchical porous activated carbon. The preparation method comprises the steps that kawo kawo fibers and paper mill sludge are stirred to be compounded to obtain composite sludge; the composite sludge is dried and taken out to be smashed for standby; the smashed composite sludge is added into a anhydrous sodium carbonate solution, mixed and uniformly stirred to form slurry, and the slurry is impregnated and then dried; under inert gas protection, baking and carbonization are conducted; after cooling is conducted to the room temperature, the carbonized slurry is taken out; the carbonized slurry after being taken out is ground, extra anhydrous sodium carbonate and surface residues are washed away, suction filtration, drying and screening are conducted, and powdered activated carbon is obtained. The paper mill sludge composite kawo kawofibers are used as the raw material, the anhydrous sodium carbonate is used as an activating agent, and the high-performance hierarchical porous activated carbon material is obtained through carbonization and activation. A new thought and method are provided for preparing biomass activated carbon, the problem that the paper mill sludge treatment difficulty is high is indirectly solved, the preparation technology is simple and practical, energy consumption is reduced, time is saved, and the hierarchical porous activated carbon can be produced and applied on a large scale.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a multi-level porous activated carbon prepared from papermaking sludge compounded with kapok fibers and a preparation method thereof. Background technique [0002] Activated carbon is a porous carbon material obtained by using various biomass, coal and heavy petroleum as raw materials, carbonized at a temperature of several hundred degrees Celsius, and then activated. There are a large number of micropores invisible to the naked eye in the activated carbon material, which has a developed internal pore structure and a large specific surface area. It also has a variety of oxygen-containing functional groups on the surface, and the regeneration effect is good. It has been widely used in environmental protection, chemical and chemical engineering , medicine and health, food processing and agriculture and other fields. The continuous expansion of its application fields puts forwa...

Claims

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Application Information

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IPC IPC(8): C01B32/324C01B32/318C01B32/348
Inventor 罗明汉许加星关庆庆康晓荣陈求稳徐进吴功德丁克强
Owner NANJING INST OF TECH
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