CN112250069A - Method for manufacturing straw matrix activated carbon - Google Patents
Method for manufacturing straw matrix activated carbon Download PDFInfo
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- CN112250069A CN112250069A CN202011152816.8A CN202011152816A CN112250069A CN 112250069 A CN112250069 A CN 112250069A CN 202011152816 A CN202011152816 A CN 202011152816A CN 112250069 A CN112250069 A CN 112250069A
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- China
- Prior art keywords
- activated carbon
- straw
- straws
- putting
- graphene
- Prior art date
- 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 172
- 239000010902 straw Substances 0.000 title claims abstract description 99
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000011159 matrix material Substances 0.000 title claims abstract description 19
- 239000002245 particle Substances 0.000 claims abstract description 40
- 238000001035 drying Methods 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000008187 granular material Substances 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910021389 graphene Inorganic materials 0.000 claims description 30
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 26
- 238000005470 impregnation Methods 0.000 claims description 22
- 239000004460 silage Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 13
- 235000005074 zinc chloride Nutrition 0.000 claims description 13
- 239000011592 zinc chloride Substances 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- 230000003213 activating effect Effects 0.000 claims description 6
- 238000005056 compaction Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000000967 suction filtration Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 238000006386 neutralization reaction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 10
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C01B32/342—Preparation characterised by non-gaseous activating agents
- C01B32/348—Metallic compounds
-
- 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
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
-
- 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
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/194—After-treatment
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
Abstract
The invention relates to the technical field of activated carbon, and discloses a method for manufacturing straw matrix activated carbon, which comprises the following steps: step one, raw material pretreatment: putting the screened straws into clean water for cleaning, removing impurities mixed in the straws, airing the cleaned straws in the sun to reduce the water content of the straws to 40-55%, and bundling the aired straws for later use; step two, crushing the raw materials: putting the aired straws into a crusher for crushing to enable the straws to be crushed into granules, wherein the diameter of each granule is 20-30mm, and performing semi-dry ensiling on the crushed straw granules; step three, drying the raw materials: and (3) putting the half-dried ensiled straw particles into a dryer for quick drying until the weight is constant, so that the weight of the straw particles is reduced to 1-5%. The method for manufacturing the straw matrix active carbon can manufacture the active carbon with high adsorption performance, and effectively improves the quality of the straw matrix active carbon.
Description
Technical Field
The invention relates to the technical field of activated carbon, in particular to a method for manufacturing straw matrix activated carbon.
Background
The active carbon is a black porous solid carbon, the main component of the active carbon is carbon, and contains a small amount of elements such as oxygen, hydrogen, sulfur, nitrogen, chlorine and the like, the active carbon is irregularly arranged in the structure, pores are formed among cross connections, carbon tissue defects can be generated during activation, the bulk density is low, the specific surface area is large, the adsorption performance is strong, and the active carbon is an industrial adsorbent with wide application.
The traditional activated carbon preparation raw materials are coal, wood and coconut shells, the raw materials are limited in source or too long in growth period, the produced activated carbon is high in cost, a large amount of wood is needed for production and processing, the environment is not environment-friendly, and the straw after the existing agricultural planting cannot be reasonably utilized, so that the resource waste is caused, and the method for preparing the activated carbon by using the straw is an environment-friendly manufacturing method. However, the existing method for preparing the straw matrix activated carbon has simpler preparation process, so that the prepared activated carbon has poorer quality.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the method for manufacturing the straw matrix activated carbon, which has the advantages of improving the quality of the straw matrix activated carbon and the like, and solves the problem of poor quality of the straw matrix activated carbon in the current market.
(II) technical scheme
The invention provides the following technical scheme: a method for manufacturing straw matrix activated carbon comprises the following steps:
step one, raw material pretreatment: putting the screened straws into clean water for cleaning, removing impurities mixed in the straws, airing the cleaned straws in the sun to reduce the water content of the straws to 40-55%, and bundling the aired straws for later use;
step two, crushing the raw materials: putting the aired straws into a crusher for crushing to enable the straws to be crushed into granules, wherein the diameter of each granule is 20-30mm, and performing semi-dry ensiling on the crushed straw granules;
step three, drying the raw materials: putting the half-dried ensiled straw particles into a dryer for quick drying until the weight is constant, so that the weight of the straw particles is reduced to 1-5%;
step four: activating agent impregnation: preparing zinc chloride impregnation liquid, putting the dried straw particles into the prepared zinc chloride impregnation liquid for impregnation, wherein the impregnation time is 24 hours, and the solid-to-liquid ratio is 1:3, and taking the straw particles out for later use after the impregnation is finished;
step five: activating, namely putting the soaked straw particles into a high-frequency heating furnace for high-frequency heating for 40min, taking out the straw particles after heating, cooling the straw particles, and forming primary activated carbon after cooling;
putting the obtained primary activated carbon into mixing equipment, adding graphene into the mixing equipment, starting the mixing equipment, and uniformly mixing the primary activated carbon and the graphene to form graphene activated carbon;
step seven, PH neutralization: putting the graphene activated carbon into prepared deionized water for cleaning, washing the PH of the graphene activated carbon to be neutral, performing suction filtration treatment on the washed graphene activated carbon, performing quick drying by using a dryer after suction filtration, and drying to obtain the microporous graphene activated carbon.
Preferably, the conditions of the straw particle semi-dry ensiling in the second step are as follows: putting the crushed straw particles into a silage container, compacting the straw particles by using compaction equipment, sealing the silage container after compaction to avoid the straw particles from contacting with the outside air, storing the silage container in a dark storage environment at 25 ℃, and storing for 20-30 days until the straw particles give off strong wine sour interfaces to finish silage.
Preferably, the drying temperature in the third step is 90-100 ℃, and the drying time is 20 min.
Preferably, the mixture ratio of the zinc chloride impregnation liquid in the fourth step is as follows: 20% zinc chloride and 80% water.
Preferably, the heating temperature of the high-frequency heating furnace in the step five is 500-600 ℃.
Preferably, the graphene in the sixth step is extracted from corncobs.
Preferably, the drying time in the seventh step is 20 min.
(III) advantageous effects
Compared with the prior art, the invention provides a method for manufacturing straw matrix activated carbon, which has the following beneficial effects:
according to the manufacturing method of the straw matrix activated carbon, the microporous graphene activated carbon can be produced and processed through the steps of the first step, the second step, the third step, the fourth step, the fifth step, the sixth step and the seventh step, and the microporous graphene activated carbon has more excellent adsorption performance compared with activated carbon produced by a traditional method, so that the using effect of the activated carbon can be improved, and the quality of the straw matrix activated carbon is effectively improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A method for manufacturing straw matrix activated carbon comprises the following steps:
step one, raw material pretreatment: putting the screened straws into clean water for cleaning, removing impurities mixed in the straws, airing the cleaned straws in the sun to reduce the water content of the straws to 40-55%, and bundling the aired straws for later use;
step two, crushing the raw materials: putting the aired straws into a crusher for crushing to enable the straws to be crushed into granules, wherein the diameter of each granule is 20-30mm, and performing semi-dry ensiling on the crushed straw granules;
step three, drying the raw materials: putting the half-dried ensiled straw particles into a dryer for quick drying until the weight is constant, so that the weight of the straw particles is reduced to 1-5%;
step four: activating agent impregnation: preparing zinc chloride impregnation liquid, putting the dried straw particles into the prepared zinc chloride impregnation liquid for impregnation, wherein the impregnation time is 24 hours, and the solid-to-liquid ratio is 1:3, and taking the straw particles out for later use after the impregnation is finished;
step five: activating, namely putting the soaked straw particles into a high-frequency heating furnace for high-frequency heating for 40min, taking out the straw particles after heating, cooling the straw particles, and forming primary activated carbon after cooling;
putting the obtained primary activated carbon into mixing equipment, adding graphene into the mixing equipment, starting the mixing equipment, and uniformly mixing the primary activated carbon and the graphene to form graphene activated carbon;
step seven, PH neutralization: putting the graphene activated carbon into prepared deionized water for cleaning, washing the PH of the graphene activated carbon to be neutral, performing suction filtration treatment on the washed graphene activated carbon, performing quick drying by using a dryer after suction filtration, and drying to obtain the microporous graphene activated carbon.
The method has the advantages that the microporous graphene activated carbon can be produced and processed, and has more excellent adsorption performance compared with the activated carbon produced by the traditional method, so that the use effect of the activated carbon can be improved, and the quality of the straw matrix activated carbon is effectively improved.
The straw particle semi-dry ensiling condition in the second step is as follows: the method comprises the steps of putting crushed straw particles into a silage container, then compacting the straw particles by using compaction equipment, sealing the silage container after compaction to avoid the straw particles from contacting with outside air, placing the silage container in a dark storage environment with the temperature of 25 ℃ for storage, wherein the silage time is 20-30 days, and the silage is finished until the straw particles give out strong wine sour interfaces, so that the silage effect and the silage efficiency can be improved under strict silage conditions, and the problem that the straw particles are rotten during silage is avoided.
And in the third step, the drying temperature is 90-100 ℃, and the drying time is 20 min.
The zinc chloride impregnation liquid in the fourth step comprises the following components in percentage by weight: the zinc chloride impregnation liquid prepared from 20% of zinc chloride and 80% of water has a good using effect.
The heating temperature of the high-frequency heating furnace in the fifth step is 500-600 ℃, so that the straw particles are prevented from being damaged on the premise of ensuring the heating effect.
In the sixth step, the graphene is extracted from the corncobs, so that the utilization rate of crops is improved, and the environmental protection property of the activated carbon production is improved.
And the drying time in the seventh step is 20min, so that the problem that the microporous graphene activated carbon is damaged due to overlong drying time is solved.
In summary, the manufacturing method of the straw matrix activated carbon can produce and process the microporous graphene activated carbon, and the microporous graphene activated carbon has more excellent adsorption performance compared with activated carbon produced by a traditional method, so that the use effect of the activated carbon can be improved, and the quality of the straw matrix activated carbon is effectively improved.
It should be noted that the term "comprises/comprising" when used in this specification is taken to specify the presence of stated elements, integers, steps, operations, elements, components, and/or groups thereof, but does not exclude the presence or addition of other elements, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A method for manufacturing straw matrix activated carbon is characterized by comprising the following steps:
step one, raw material pretreatment: putting the screened straws into clean water for cleaning, removing impurities mixed in the straws, airing the cleaned straws in the sun to reduce the water content of the straws to 40-55%, and bundling the aired straws for later use;
step two, crushing the raw materials: putting the aired straws into a crusher for crushing to enable the straws to be crushed into granules, wherein the diameter of each granule is 20-30mm, and performing semi-dry ensiling on the crushed straw granules;
step three, drying the raw materials: putting the half-dried ensiled straw particles into a dryer for quick drying until the weight is constant, so that the weight of the straw particles is reduced to 1-5%;
step four: activating agent impregnation: preparing zinc chloride impregnation liquid, putting the dried straw particles into the prepared zinc chloride impregnation liquid for impregnation, wherein the impregnation time is 24 hours, and the solid-to-liquid ratio is 1:3, and taking the straw particles out for later use after the impregnation is finished;
step five: activating, namely putting the soaked straw particles into a high-frequency heating furnace for high-frequency heating for 40min, taking out the straw particles after heating, cooling the straw particles, and forming primary activated carbon after cooling;
putting the obtained primary activated carbon into mixing equipment, adding graphene into the mixing equipment, starting the mixing equipment, and uniformly mixing the primary activated carbon and the graphene to form graphene activated carbon;
step seven, PH neutralization: putting the graphene activated carbon into prepared deionized water for cleaning, washing the PH of the graphene activated carbon to be neutral, performing suction filtration treatment on the washed graphene activated carbon, performing quick drying by using a dryer after suction filtration, and drying to obtain the microporous graphene activated carbon.
2. A method of making straw-based activated carbon as claimed in claim 1, which comprises: the straw particle semi-dry ensiling condition in the second step is as follows: putting the crushed straw particles into a silage container, compacting the straw particles by using compaction equipment, sealing the silage container after compaction to avoid the straw particles from contacting with the outside air, storing the silage container in a dark storage environment at 25 ℃, and storing for 20-30 days until the straw particles give off strong wine sour interfaces to finish silage.
3. A method of making straw-based activated carbon as claimed in claim 1, which comprises: and in the third step, the drying temperature is 90-100 ℃, and the drying time is 20 min.
4. A method of making straw-based activated carbon as claimed in claim 1, which comprises: the zinc chloride impregnation liquid in the fourth step comprises the following components in percentage by weight: 20% zinc chloride and 80% water.
5. A method of making straw-based activated carbon as claimed in claim 1, which comprises: the heating temperature of the high-frequency heating furnace in the fifth step is 500-600 ℃.
6. A method of making straw-based activated carbon as claimed in claim 1, which comprises: and in the sixth step, the graphene is extracted from the corncobs.
7. A method of making straw-based activated carbon as claimed in claim 1, which comprises: and the drying time in the seventh step is 20 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011152816.8A CN112250069A (en) | 2020-10-26 | 2020-10-26 | Method for manufacturing straw matrix activated carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011152816.8A CN112250069A (en) | 2020-10-26 | 2020-10-26 | Method for manufacturing straw matrix activated carbon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112250069A true CN112250069A (en) | 2021-01-22 |
Family
ID=74262387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011152816.8A Pending CN112250069A (en) | 2020-10-26 | 2020-10-26 | Method for manufacturing straw matrix activated carbon |
Country Status (1)
| Country | Link |
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| CN (1) | CN112250069A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103723723A (en) * | 2013-11-22 | 2014-04-16 | 盐城纳新天地新材料科技有限公司 | Preparation method of graphene-modified activated carbon |
| CN104610916A (en) * | 2015-02-11 | 2015-05-13 | 江苏金麦穗新能源科技股份有限公司 | Rice-wheat straw activated carbon powder toughening particle friction material and preparation method thereof |
| WO2015109206A1 (en) * | 2014-01-16 | 2015-07-23 | Biogenic Reagent Ventures, Llc | Carbon micro-plant |
| CN106115692A (en) * | 2016-06-17 | 2016-11-16 | 山东建筑大学 | A kind of method utilizing hay silage straw to prepare microporous activated carbon |
| CN106206051A (en) * | 2016-07-01 | 2016-12-07 | 浙江工业大学 | A kind of Graphene modified activated carbon and application thereof |
-
2020
- 2020-10-26 CN CN202011152816.8A patent/CN112250069A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103723723A (en) * | 2013-11-22 | 2014-04-16 | 盐城纳新天地新材料科技有限公司 | Preparation method of graphene-modified activated carbon |
| WO2015109206A1 (en) * | 2014-01-16 | 2015-07-23 | Biogenic Reagent Ventures, Llc | Carbon micro-plant |
| CN104610916A (en) * | 2015-02-11 | 2015-05-13 | 江苏金麦穗新能源科技股份有限公司 | Rice-wheat straw activated carbon powder toughening particle friction material and preparation method thereof |
| CN106115692A (en) * | 2016-06-17 | 2016-11-16 | 山东建筑大学 | A kind of method utilizing hay silage straw to prepare microporous activated carbon |
| CN106206051A (en) * | 2016-07-01 | 2016-12-07 | 浙江工业大学 | A kind of Graphene modified activated carbon and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 南京林产工业学院: "《林产化学工业手册 下册》", 31 August 1981, 中国林业出版社 * |
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Application publication date: 20210122 |