CN112028072A - Method for preparing activated carbon from corncob residues - Google Patents
Method for preparing activated carbon from corncob residues Download PDFInfo
- Publication number
- CN112028072A CN112028072A CN202010982424.8A CN202010982424A CN112028072A CN 112028072 A CN112028072 A CN 112028072A CN 202010982424 A CN202010982424 A CN 202010982424A CN 112028072 A CN112028072 A CN 112028072A
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- CN
- China
- Prior art keywords
- activation
- corncob
- phosphoric acid
- residues
- activated carbon
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 14
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000002994 raw material Substances 0.000 claims abstract description 31
- 230000004913 activation Effects 0.000 claims abstract description 28
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 15
- 238000003763 carbonization Methods 0.000 claims abstract description 14
- 239000005539 carbonized material Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 230000003213 activating effect Effects 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 239000002440 industrial waste Substances 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 11
- 238000010000 carbonizing Methods 0.000 claims description 6
- 238000007598 dipping method Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 239000002028 Biomass Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 240000008042 Zea mays Species 0.000 description 6
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 6
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 6
- 235000005822 corn Nutrition 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 4
- MIDXCONKKJTLDX-UHFFFAOYSA-N 3,5-dimethylcyclopentane-1,2-dione Chemical compound CC1CC(C)C(=O)C1=O MIDXCONKKJTLDX-UHFFFAOYSA-N 0.000 description 3
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 3
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 3
- 235000013736 caramel Nutrition 0.000 description 3
- 229910052740 iodine Inorganic materials 0.000 description 3
- 239000011630 iodine Substances 0.000 description 3
- 229960000907 methylthioninium chloride Drugs 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- SRBFZHDQGSBBOR-IOVATXLUSA-N D-xylopyranose Chemical compound O[C@@H]1COC(O)[C@H](O)[C@H]1O SRBFZHDQGSBBOR-IOVATXLUSA-N 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- PYMYPHUHKUWMLA-UHFFFAOYSA-N arabinose Natural products OCC(O)C(O)C(O)C=O PYMYPHUHKUWMLA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- SRBFZHDQGSBBOR-UHFFFAOYSA-N beta-D-Pyranose-Lyxose Natural products OC1COC(O)C(O)C1O SRBFZHDQGSBBOR-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002972 pentoses Chemical class 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/324—Preparation characterised by the starting materials from waste materials, e.g. tyres or spent sulfite pulp liquor
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/342—Preparation characterised by non-gaseous activating agents
Abstract
The invention discloses a method for preparing activated carbon from corncob residues. Taking industrial waste corncob residues as a raw material, taking phosphoric acid as an activating agent, uniformly mixing the corncob residues with a phosphoric acid solution with the mass fraction of 60%, wherein the mass ratio of the phosphoric acid solution to the corncob residues is 1.3:1-3.0:1, carrying out pretreatment carbonization firstly, the carbonization heating temperature is 180-290 ℃, and the carbonization time is 50-120 min; then placing the carbonized material in an activation device for activation, wherein the activation device is a muffle furnace, the activation temperature is 320-530 ℃, and the activation time is 15-120 min; finally, the finished product of the active carbon is obtained by drying after washing. The invention aims to realize the comprehensive reutilization of waste biomass, and simultaneously develop new raw material resources for the production of activated carbon, thereby ensuring the utilization of the resources.
Description
Technical Field
The invention belongs to the technical field of carbon processing, and particularly relates to a method for preparing activated carbon from industrial waste corncob residues serving as a raw material.
Background
In the prior art process for producing xylose, the corn cob of crops is used as a raw material, pentose solution can be obtained under an acidic condition, a large amount of corn cob residues are generated, part of the corn cob residues are used for a combustion boiler, and most of the corn cob residues cannot be treated, so that the environmental pollution is caused, the industrial waste residues are changed into valuable things, and the condition that the carbonaceous raw material for preparing the activated carbon is in short supply is solved.
Disclosure of Invention
In view of the above, the invention provides a method for preparing activated carbon from corncob residues, and aims to realize comprehensive recycling of waste biomass, develop new raw material resources for production of activated carbon, and ensure utilization of resources.
The invention solves the technical problems by the following technical means:
the invention relates to a method for preparing activated carbon by using corncob residues, which takes industrial waste corncob residues as a raw material and phosphoric acid as an activating agent, uniformly mixes the corncob residues with a phosphoric acid solution with the mass fraction of 60%, and carries out pretreatment carbonization on the corncob residues according to the mass ratio of pure phosphoric acid to absolute dry raw material of 1.3:1-3.0:1, wherein the carbonization heating temperature is 180-290 ℃, and the carbonization time is 50-120 min; then placing the carbonized material in an activation device for activation, wherein the activation device is a muffle furnace, the activation temperature is 320-530 ℃, and the activation time is 15-120 min; finally, the finished product of the active carbon is obtained by drying after washing.
A method for preparing activated carbon from corncob residues comprises the following steps:
1. preparing raw materials, namely drying the corncob residue raw materials, and measuring the moisture to control the moisture to be 15-25%;
2. dipping, namely mixing the raw materials in the step 1 with a phosphoric acid solution with the mass fraction of 60%, uniformly stirring and fully dipping;
3. pre-treating and carbonizing, namely transferring the corncob residues fully soaked in the step 2 into an oven for pre-treating and carbonizing;
4. activating, namely placing the carbonized material obtained in the step 3 in a muffle furnace for activation;
5. washing, and after the activation is finished, rinsing the activated material with water until the pH value of the rinsing liquid is 4-6.
6. Drying, and drying the product at 150 ℃ to constant weight.
The method for preparing the activated carbon from the corn cob residues of the crops by using the phosphoric acid method has the advantages that the methylene blue adsorption value of the prepared activated carbon from the corn cob residues is 250mg/g of 200-fold materials, the iodine adsorption value is 800mg/g of 700-fold materials, the caramel is 90-110 percent, and the specific surface area is 100-fold materials and is 250 m-fold materials2G, pore volume of 1-1.1cm3The mesopore ratio is 70-72%.
The invention has the beneficial effects that: aims to realize the comprehensive reutilization of waste biomass, develop new raw material resources for the production of active carbon and ensure the utilization of the resources.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
The invention will be described in detail below with reference to the accompanying figure 1 and specific examples: the method for preparing the activated carbon by using the corncob residues in the embodiment comprises the steps of taking industrial waste corncob residues as a raw material and phosphoric acid as an activating agent, uniformly mixing the corncob residues with a phosphoric acid solution with the mass fraction of 60%, and carrying out pretreatment carbonization on the corncob residues according to the mass ratio of pure phosphoric acid to absolute dry raw materials of 1.3:1-3.0:1, wherein the carbonization heating temperature is 180-290 ℃, and the carbonization time is 50-120 min; then placing the carbonized material in an activation device for activation, wherein the activation device is a muffle furnace, the activation temperature is 320-530 ℃, and the activation time is 15-120 min; finally, the finished product of the active carbon is obtained by drying after washing.
A method for preparing activated carbon from corncob residues comprises the following steps:
1. preparing raw materials, namely drying the corncob residue raw materials, and measuring the moisture to control the moisture to be 15-25%;
2. dipping, namely mixing the raw materials in the step 1 with a phosphoric acid solution with the mass fraction of 60%, uniformly stirring and fully dipping;
3. pre-treating and carbonizing, namely transferring the corncob residues fully soaked in the step 2 into an oven for pre-treating and carbonizing;
4. activating, namely placing the carbonized material obtained in the step 3 in a muffle furnace for activation;
5. washing, and after the activation is finished, rinsing the activated material with water until the pH value of the rinsing liquid is 4-6.
6. Drying, and drying the product at 150 ℃ to constant weight.
Example 1
Weighing 20g of dried raw materials, mixing the raw materials with a phosphoric acid solution with the mass fraction of 60% according to the impregnation ratio (the mass ratio of pure phosphoric acid to the absolutely dry raw materials) of 2.0:1, stirring uniformly, standing to fully impregnate the raw materials, placing the raw materials in an oven for carbonization at 270 ℃ for 1h, placing the carbonized materials in a muffle furnace for activation at 450 ℃ for 1h, rinsing the obtained activated materials with water for multiple times until the pH value of the filtrate is 4-6, and placing the activated materials in the oven at 150 ℃ for drying until the weight is constant to obtain the activated carbon. Through the test: the methylene blue adsorption value is 211.3mg/g, the iodine adsorption value is 792.5mg/g, the caramel content is 103 percent, and the specific surface area is 201m2G, pore volume 1.09cm3(ii) a mesopore ratio of 71.5%
Example 2
Weighing 20g of dried raw materials, mixing the raw materials with a phosphoric acid solution with the mass fraction of 60% according to the impregnation ratio (the mass ratio of pure phosphoric acid to the absolutely dry raw materials) of 1.8:1, stirring uniformly, standing to fully impregnate the raw materials, placing the raw materials in an oven for carbonization at 270 ℃ for 1h, placing the carbonized materials in a muffle furnace for activation at 450 ℃ for 1h, rinsing the obtained activated materials with water for multiple times until the pH value of the filtrate is 4-6, and placing the activated materials in the oven at 150 ℃ for drying until the weight is constant to obtain the activated carbon. Through the test: the methylene blue adsorption value is 209.0mg/g, the iodine adsorption value is 753.0mg/g, the caramel content is 99 percent, and the specific surface area is 101m2G, pore volume 1.00cm3(g), the mesopore ratio is 70.1%.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (2)
1. A method for preparing activated carbon by using corncob residues is characterized by comprising the following steps: taking industrial waste corncob residues as a raw material, taking phosphoric acid as an activating agent, uniformly mixing the corncob residues with a phosphoric acid solution with the mass fraction of 60%, wherein the mass ratio of the phosphoric acid solution to the corncob residues is 1.3:1-3.0:1, carrying out pretreatment carbonization firstly, the carbonization heating temperature is 180-290 ℃, and the carbonization time is 50-120 min; then placing the carbonized material in an activation device for activation, wherein the activation device is a muffle furnace, the activation temperature is 320-530 ℃, and the activation time is 15-120 min; finally, the finished product of the active carbon is obtained by drying after washing.
2. The method for preparing activated carbon from corncob residue as claimed in claim 1, which comprises the following steps:
1. preparing raw materials, namely drying the corncob residue raw materials, and measuring the moisture to control the moisture to be 15-25%;
2. dipping, namely mixing the raw materials in the step 1 with a phosphoric acid solution with the mass fraction of 60%, uniformly stirring and fully dipping;
3. pre-treating and carbonizing, namely transferring the corncob residues fully soaked in the step 2 into an oven for pre-treating and carbonizing;
4. activating, namely placing the carbonized material obtained in the step 3 in a muffle furnace for activation;
5. washing, and after the activation is finished, rinsing the activated material with water until the pH value of the rinsing liquid is 4-6.
6. Drying, and drying the product at 150 ℃ to constant weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010982424.8A CN112028072A (en) | 2020-09-17 | 2020-09-17 | Method for preparing activated carbon from corncob residues |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010982424.8A CN112028072A (en) | 2020-09-17 | 2020-09-17 | Method for preparing activated carbon from corncob residues |
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| Publication Number | Publication Date |
|---|---|
| CN112028072A true CN112028072A (en) | 2020-12-04 |
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| CN202010982424.8A Pending CN112028072A (en) | 2020-09-17 | 2020-09-17 | Method for preparing activated carbon from corncob residues |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466618A (en) * | 2013-09-10 | 2013-12-25 | 无锡宝禾生物科技有限公司 | Continuous type preparation method of biomass activated carbon |
| CN104528719A (en) * | 2014-12-17 | 2015-04-22 | 中国林业科学研究院林产化学工业研究所 | Method for preparing activated carbon by using alkali xylose residues as raw material |
| CN104843701A (en) * | 2015-04-27 | 2015-08-19 | 宁夏医科大学 | Method for preparing activated carbon from waste Chinese angelica residues |
| WO2017198160A1 (en) * | 2016-05-18 | 2017-11-23 | 天津科技大学 | Method for preparing activated carbon having high specific surface area by using rapid activation under fluidization |
| CN109052399A (en) * | 2018-08-22 | 2018-12-21 | 贵州森环活性炭有限公司 | Clean the production method of low consumption activated carbon of phosphoric acid method |
-
2020
- 2020-09-17 CN CN202010982424.8A patent/CN112028072A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466618A (en) * | 2013-09-10 | 2013-12-25 | 无锡宝禾生物科技有限公司 | Continuous type preparation method of biomass activated carbon |
| CN104528719A (en) * | 2014-12-17 | 2015-04-22 | 中国林业科学研究院林产化学工业研究所 | Method for preparing activated carbon by using alkali xylose residues as raw material |
| CN104843701A (en) * | 2015-04-27 | 2015-08-19 | 宁夏医科大学 | Method for preparing activated carbon from waste Chinese angelica residues |
| WO2017198160A1 (en) * | 2016-05-18 | 2017-11-23 | 天津科技大学 | Method for preparing activated carbon having high specific surface area by using rapid activation under fluidization |
| CN109052399A (en) * | 2018-08-22 | 2018-12-21 | 贵州森环活性炭有限公司 | Clean the production method of low consumption activated carbon of phosphoric acid method |
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Application publication date: 20201204 |