CN106672965A - Method for preparing high-surface-area multi-stage porous carbon with cotton straws - Google Patents
Method for preparing high-surface-area multi-stage porous carbon with cotton straws Download PDFInfo
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- CN106672965A CN106672965A CN201710008199.6A CN201710008199A CN106672965A CN 106672965 A CN106672965 A CN 106672965A CN 201710008199 A CN201710008199 A CN 201710008199A CN 106672965 A CN106672965 A CN 106672965A
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- activated carbon
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/14—Pore volume
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/16—Pore diameter
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Abstract
The invention belongs to the field of activated carbon and provides a method for preparing high-surface-area multi-stage porous carbon with cotton straws. The method includes: 1), pretreatment including (1) preparation of raw materials, namely smashing the cotton straws to be 5-15mm in particle size via or not via sheath-core separation and screening to remove residues; (2), rinsing with clean water, namely rinsing with water prior to dehydration; (3), rubbing and heap leaching, namely rubbing to devillicate after adding an alkalescent solution for heap leaching and extruding residual liquid for heap leaching; (4), bomb explosion treatment, namely putting into a sealed pressure vessel, pumping in high-pressure steam, keeping 1.0MPa-2.5MPa atmosphere pressure for 5-20 minutes, releasing materials and the steam in 60-75 millseconds and releasing the atmosphere pressure to normal pressure, and letting the materials to explode; (5), rinsing with deionized water, namely rinsing with the deionized water and performing dehydration; (6), performing drying; 2), adding of an ting agent; 3), drying and grinding; 4), activating; 5), washing; 6), drying. With the method, cotton straw carbon sources can be utilized, and the method is simple in process, small in use amount of the activating agent, low in production cost and suitable for promotion.
Description
Technical field
The invention belongs to activated carbon preparing technical field, specifically a kind of cotton stalk prepares high-ratio surface multi-stage porous activity
The method of charcoal.
Background technology
Activated carbon is black powder or granular amorphous carbon, also the crystal carbon comprising marshalling.Activated carbon by
Have that specific surface area is big in it, conduct electricity very well, electrochemical stability is good, high adsorption capacity the features such as, therefore be widely used
In fields such as gas absorption separation, food processing, the electrode material of ultracapacitor, medical treatment, environmental protection, national defence, agriculturals.Activated carbon
Preparation method be mainly natural material（Such as bagasse, cotton stalk, shell）After charing, then lived with activator mixing high temperature
Change and obtain.It is cotton stalk to prepare the carbon source that activated carbon uses, and is the discarded object of agricultural product, not only increases the additional of agricultural product
Value, and there are environment-friendly, wide material sources, with low cost, the specific surface area of the activated carbon for preparing is higher.But
It is more single to be that activated carbon structure remains unchanged, and based on micropore, absorption property is poor, and preparation process consumes substantial amounts of activator.
The persursor material of activated carbon is prepared, two major classes are can be divided mainly at present：Plant and mineral substance.Plant is life
Material, mainly has：Timber, stalk, cauline leaf, shell etc..Using the natural structure of biological material, micropore hair can be obtained
Up to, specific surface area activated carbon very high, and with mechanical strength higher.Mineral substance raw material have：Coal, petroleum coke, synthesis
Resin etc., in these raw material, coal resources are most abundant, but coal texture directly affects activated carbon with component characteristic
Performance, ash content is high and is difficult to the flourishing micropore of generation.
By the use of renewable biomass, especially various biological materials are rich as activated carbon carbon matrix precursor material, raw material is prepared
Richness, method is easy, economically feasible, environmentally friendly and endemic element that biological material can be utilized to possess in itself and structure.
By corresponding process modification, people have been able to prepare the high-performance activity with unique texture using biological material
Carbon, causes many researchs both domestic and external and concern.
Biological material is mainly and is grouped into by cellulose, hemicellulose and the great achievement of lignin three, but these three components exist
Composition, structure in plant and distribution can be because of the species of plant, the place of production and growth period etc. it is different and different.Additionally, biomass
In stalk also containing the organic compound such as a small amount of pectin, fat, wax and plant growth needed for, and transported and raw in raw material
Various metallic elements brought during product etc..This causes that the chemical composition and structure of biomass straw are extremely complex, also causes
There is very big difference in the pretreatment of different biomass straws and Land use systems, or even completely different.
At present, biological material is generally required when activated carbon is prepared as persursor material and pre-processed, its method
Biological material is typically crushed to powder, its distinctive natural fine pore passage structure is not by corresponding technique hand
Section is made full use of, therefore existing activated carbon from activated sludge technology of preparing solve only the Utilizing question of biological material, and
The microscopic characteristics in the institutional framework of biological material are not made full use of, biomass microcellular structure and micropore surface is expanded
Product.
Specific to cotton stalk, its content of lignin is higher than general biomass material, while ash content and gelatin substance content
Height, makes it possess as the good natural endowment of activated carbon precursor, but have the shortcomings that to be more difficult to processing and utilization.
On the other hand, the preparation method of multistage mesoporous activated carbon mainly has template, chemical activation method and physically activated at present
Method.Template is typically from a kind of material of special pore structure as template, import target material or presoma and make its
Reacted in the hole of mould material, acted on using the limitation of mould material, realized anti-to the physics and chemistry in preparation process
Should control, finally give the new material of structure-controllable.The pore structure and pattern of the multi-stage porous Carbon Materials that the method is obtained receive die
The limitation of plate, and template preparation technology is relative complex, it is relatively costly.Physical activation method is first to be carbonized raw material, Ran Houzai
Activated with vapor or carbon dioxide, the simple production process, cleaning, in the absence of asking for equipment corrosion and environmental pollution
Topic, but activation temperature and soak time more long higher is generally needed, energy consumption is also higher.Chemical activation method is typically by general
The presoma and activator of charcoal are mixed, then high-temperature calcination, can obtain specific surface area activated carbon higher, but can consume
Substantial amounts of alkali activator, and have serious corrosivity to equipment.
China is large agricultural country, possesses abundant cotton stalk resource, and wherein most is idle to be wasted or on-site incineration,
Cause serious air environmental pollution.
It is therefore desirable to study a kind of natural hole framework that can make full use of cotton stalk, process is simple, activator consumption
Amount is few, realizes the method that low cost prepares high-specific surface area multistage mesoporous activated carbon.
The content of the invention
The purpose of the present invention be using it is cheap and easy to get and, environment-friendly cotton stalk, add by special pretreating process
Work, the carbon source material of the microcosmic duct architecture for obtaining possessing excellent；A step activation method is used again, and with inorganic in activator
Salt replaces a part of highly basic, and activator consumption is greatly lowered, equipment corrosion degree is also considerably reduced, so as to realize overcast
Prepare high-ratio surface multistage mesoporous activated carbon.
The technical scheme is that：
A kind of method that cotton stalk prepares high-ratio surface multistage mesoporous activated carbon, implements according to the following steps：
Step one is pre-processed：Prepared including (1) raw material：By cotton stalk, separate and remove peach by core-skin, after leaf, withe
The cladding and core material for obtaining crush the cladding and core material for obtaining 5~15mm of particle diameter respectively, or separate direct powder without core-skin
It is broken, obtain the non-separating material of 5~15mm of particle diameter；Then the qualified material of 5~15mm of particle diameter is screened out, screening removes dust, miscellaneous
Matter；(2) clear water rinsing：Material is rinsed with water, is then dehydrated；(3) dump leaching is rubbed：By heap after material addition weak caustic solution
Leaching, machinery is rubbed to its sub-wire, extrudes surplus liquid, again dump leaching；(4) Hong quick-fried treatment：Material is inserted into closed pressure vessel
It is interior, high steam is passed through, keep 1.0MPa~2.5MPa air pressure 5~20 minutes, discharge material and steam simultaneously in 60~75ms
Pressure release to normal pressure, material is produced；(5) deionized water rinsing：Material is rinsed with deionized water, dehydration；(6) dry：By material
Uniform drying；
Step 2 adds activator：Resulting material and the appropriate activator aqueous solution are sufficiently impregnated dissolving；
Step 3 drying grinding：It is ground into powder after moisture in material is removed；
Step 4 is activated：Material is carried out into activation heat treatment under nitrogen protective condition；
Step 5 is cleaned：Material is cleaned；
Step 6 is dried：Treatment is dried to material, high-ratio surface multistage mesoporous activated carbon is obtained final product.
Present invention additionally comprises optimization or/and improvement have：
One of preferred scheme：The activator aqueous solution in the step 2 is inorganic salts and the mixed solution of alkali；
The two of preferred scheme：Described activator is 2~3 with the consumption mass ratio of preceding material：7.5；
The three of preferred scheme：The temperature of the step 3 activation heat treatment is 800 DEG C, and the time is 1~2h；
The four of preferred scheme：Cleaning in the step 5 is respectively hydrochloric acid cleaning and deionized water cleaning.
Further preferred scheme has：
The five of preferred scheme：The activator aqueous solution in the step 2 is potassium carbonate and the mixed solution of potassium hydroxide；
The six of preferred scheme：Concentration of hydrochloric acid in the step 5 is 1mol/L.
Implementing the beneficial effect of technical solution of the present invention is：
The present invention prepares activated carbon using cotton stalk as carbon source material, belongs to the discarded object of agricultural product, not only increases agricultural production
The added value of product, and there is environment-friendly, wide material sources, with low cost, the activated carbon specific surface area for preparing
Higher, pore-size distribution is good；
The present invention can make full use of the natural fine pore passage structure of cotton stalk to be expanded into more by special pretreating process
It is flourishing biomass microcellular structure so that the activated carbon of preparation can obtain bigger specific surface area and more flourishing hole point
Cloth；
The present invention replaces a part of highly basic, activator consumption with inorganic salts in additionally using one-step preparation process, and activator
It is greatly lowered, equipment corrosion degree is also considerably reduced, so as to realizes overcast local preparing high-ratio surface multistage mesoporous activated carbon.
To sum up, present invention process is simple, low production cost, good product quality, and sustainability is strong, is adapted to popularization and application.
Technical scheme is described in detail with reference to embodiment.
Brief description of the drawings
Nothing.
Specific embodiment
To make those skilled in the art more fully understand technical scheme, below with embodiment the present invention is made into
One step ground is described in detail.
Embodiment 1
1.0t cottons stalk is taken as activated carbon precursor material, its step is：
Step one is pre-processed：(1) prepared by raw material：By cotton stalk, separate and remove peach by core-skin, obtain after leaf, withe
Cladding and core material crush the cladding and core material for obtaining 5~15mm of particle diameter respectively, or separate directly crushing without core-skin, obtain
To the non-separating material of 5~15mm of particle diameter；Then the qualified material of 5~15mm of particle diameter is screened out, screening removes dust, impurity；(2)
Clear water is rinsed：Material is rinsed with water, is then dehydrated；(3) dump leaching is rubbed：By dump leaching, machine after material addition weak caustic solution
Tool is rubbed to its sub-wire, extrudes surplus liquid, again dump leaching；(4) Hong quick-fried treatment：Material is inserted in closed pressure vessel, is led to
Enter high steam, keep 1.0MPa~2.5MPa air pressure 5~20 minutes, discharge material and steam in 60~75ms and pressure release extremely
Normal pressure, material is produced；(5) deionized water rinsing：Material is rinsed with deionized water, dehydration；(6) dry：Material is uniformly dried
It is dry, obtain 0.3t pretreatment cotton stalks；
Step 2 adds activator：In mass ratio it is 1 by potassium hydroxide, potassium carbonate and the present embodiment pretreatment cotton stalk：2：7.5
Ratio mixing is dissolved in water, stirs, and the mixture is standing and soak for into 24h, is sufficiently impregnated pretreatment cotton stalk and aqueous slkali
Dissolving；
Step 3 drying grinding：The mixture that will be obtained is placed in and 12h is dried in 100 DEG C of baking ovens, removes the moisture in mixture, obtains
To product be ground into powder；
Step 4 is activated：The solid powder is placed in tube furnace, under nitrogen protection, is warmed up to the speed of 10 DEG C/min
100 DEG C, keep 1h, then be warmed up to 300 DEG C with the speed, speed now is set into 1 DEG C/min is warmed up to 400 DEG C, continue with
The speed of 10 DEG C/min is warmed up to 800 DEG C, and keeps 2h, and room temperature is cooled under nitrogen atmosphere, obtains activation products；
Step 5 is cleaned：The activation products for obtaining first are cleaned with the HCl of 1mol/L, neutralized, by product deionized water after cleaning
Clean to pH=7~8；
Step 6 is dried：Product after cleaning is dried into 12h in 100 DEG C of baking oven, high-specific surface area multistage mesoporous activated carbon is obtained
0.08t。
The absorbent charcoal material that the present embodiment is obtained is tested and analyzed through BJH computational methods, and the sample has micropore, mesoporous simultaneously
With the hierarchical porous structure of macropore, and larger specific surface area is can obtain through step activation, specific surface area reaches 2398.6m2/g, hole
Gap volume 1.727cm3/g, average pore size 2.925nm.
Embodiment 2
1.0t cottons stalk is taken as activated carbon precursor material, its step is：
Step one is pre-processed：(1) prepared by raw material：By cotton stalk, separate and remove peach by core-skin, obtain after leaf, withe
0.5t core materials are crushed to 5~15mm of particle diameter, and screening removes dust, impurity screening and removes dust, impurity, and particle diameter is more than into 15mm's
Cladding is returned and continues to crush, and the unqualified material by size less than 5mm is discarded；(2) clear water rinsing：Material is floated with water
Wash, be then dehydrated；(3) dump leaching is rubbed：By dump leaching after the NaOH weak caustic solutions of the pH9 of material addition 3% 48 hours, machinery was rubbed
To its sub-wire, surplus liquid is extruded, again dump leaching 30 hours；(4) Hong quick-fried treatment：Material is inserted in closed pressure vessel, is led to
Enter high steam, keep 2.0~2.5MPa air pressure 5~10 minutes, discharge material and steam in 60ms and pressure release is to normal pressure, thing
Material is produced；(5) deionized water rinsing：Material is rinsed with deionized water, dehydration；(6) dry：Material is uniformly dried, is obtained
0.35t pre-processes cotton stalk；
Step 2 adds activator：In mass ratio it is 1 by potassium hydroxide, potassium carbonate and the present embodiment pretreatment cotton stalk：2：7.5
Ratio mixing is dissolved in water, stirs, and the mixture is standing and soak for into 24h, is sufficiently impregnated cotton stalk cladding and aqueous slkali molten
Solution；
Step 3 drying grinding：The mixture for obtaining is placed in and 12h is dried in 100 DEG C of baking ovens, removes the moisture in mixture, obtains
Product be ground into powder；
Step 4 is activated：The solid powder is placed in tube furnace, under nitrogen protection, is warmed up to the speed of 10 DEG C/min
100 DEG C, keep 1h, then be warmed up to 300 DEG C with the speed, speed now is set into 1 DEG C/min is warmed up to 400 DEG C, continue with
The speed of 10 DEG C/min is warmed up to 800 DEG C, and keeps 2h, and room temperature is cooled under nitrogen atmosphere, obtains activation products；
Step 5 is cleaned：The activation products for obtaining first are cleaned with the HCl of 1mol/L, neutralized, by product deionized water after cleaning
Clean to pH=7~8；
Step 6 is dried：Product after cleaning is dried into 12h in 100 DEG C of baking oven, high-specific surface area multistage mesoporous activated carbon is obtained
0.1t。
The absorbent charcoal material that the present embodiment is obtained is tested and analyzed through BJH computational methods, and the sample has micropore, mesoporous simultaneously
With the hierarchical porous structure of macropore, and larger specific surface area is can obtain through step activation, specific surface area reaches 2261.1m2/g, hole
Gap volume 1.641cm3/g, average pore size 2.903nm.
Embodiment 3
1.0t cottons stalk is taken as activated carbon precursor material, its step is：
Step one is pre-processed：(1) prepared by raw material：Take a certain amount of cotton stalk, without core-skin separate, be directly crushed to particle diameter 5~
Chalk dust removing, impurity are removed in 15mm, screening；(2) clear water rinsing：Material is rinsed, is dehydrated to water content about；(3) dump leaching is rubbed：
By dump leaching after the NaOH weak caustic solutions of the pH9.5 of material addition 1% 48 hours, machinery was rubbed to its sub-wire, extrudes surplus liquid,
Dump leaching 42 hours again；(4) Hong quick-fried treatment：Material is inserted in closed pressure vessel, high steam is passed through, 1.0MPa gas is kept
Pressure 5 minutes, discharges material and steam and pressure release is to normal pressure with the time of 60ms, and material is produced；(5) deionized water rinsing：By thing
Material is rinsed with deionized water, dehydration；(6) dry：Material is uniformly dried, 0.7t pretreatment cotton stalks are obtained；
Step 2 adds activator：In mass ratio it is 1 by potassium hydroxide, potassium carbonate and the present embodiment pretreatment cotton stalk:2:7.5
Ratio mixing is dissolved in water, stirs, and the mixture is standing and soak for into 24h, is sufficiently impregnated pretreatment cotton stalk and aqueous slkali
Dissolving；
Step 3 drying grinding：The mixture that will be obtained is placed in and 12h is dried in 100 DEG C of baking ovens, removes the moisture in mixture, obtains
To product be ground into powder；
Step 4 is activated：The solid powder is placed in tube furnace, under nitrogen protection, is warmed up to the speed of 10 DEG C/min
100 DEG C, keep 1h, then be warmed up to 300 DEG C with the speed, speed now is set into 1 DEG C/min is warmed up to 400 DEG C, continue with
The speed of 10 DEG C/min is warmed up to 800 DEG C, and keeps 2h, and room temperature is cooled under nitrogen atmosphere, obtains activation products；
Step 5 is cleaned：The activation products for obtaining first are cleaned with the HCl of 1mol/L, neutralized, by product deionized water after cleaning
Clean to pH=7~8；
Step 6 is dried：12h will be dried in the baking oven of 100 DEG C of product after cleaning, obtain high-specific surface area multistage mesoporous activated carbon
0.2t。
The absorbent charcoal material that the present embodiment is obtained is tested and analyzed through BJH computational methods, and the sample has micropore, mesoporous simultaneously
With the hierarchical porous structure of macropore, and larger specific surface area is can obtain through step activation, specific surface area reaches 1963.3m2/g, hole
Gap volume 1.415cm3/g, average pore size 2.88nm.
It is understood that the above example principle being intended to be merely illustrative of the present and the exemplary embodiment party for using
Formula, but the invention is not limited in this, implementer can technology according to the present invention scheme and actual conditions combination known technology
To determine specific embodiment.For those skilled in the art, spirit of the invention and reality are not being departed from
In the case of matter, various changes and modifications can be made therein, and increased these variations and modifications are also considered as protection scope of the present invention.
Claims (7)
1. a kind of method that cotton stalk prepares high-ratio surface multistage mesoporous activated carbon, it is characterised in that comprise the following steps：
Step one is pre-processed：Prepared including (1) raw material：By cotton stalk, separate and remove peach by core-skin, after leaf, withe
The cladding and core material for obtaining crush the cladding and core material for obtaining 5~15mm of particle diameter respectively, or separate direct powder without core-skin
It is broken, obtain the non-separating material of 5~15mm of particle diameter；Then the qualified material of 5~15mm of particle diameter is screened out, screening removes dust, miscellaneous
Matter；(2) clear water rinsing：Material is rinsed with water, is then dehydrated；(3) dump leaching is rubbed：By heap after material addition weak caustic solution
Leaching, machinery is rubbed to its sub-wire, extrudes surplus liquid, again dump leaching；(4) Hong quick-fried treatment：Material is inserted into closed pressure vessel
It is interior, high steam is passed through, keep 1.0MPa~2.5MPa air pressure 5~20 minutes, discharge material and steam simultaneously in 60~75ms
Pressure release to normal pressure, material is produced；(5) deionized water rinsing：Material is rinsed with deionized water, dehydration；(6) dry：By material
Uniform drying；
Step 2 adds activator：Resulting material and the appropriate activator aqueous solution are sufficiently impregnated dissolving；
Step 3 drying grinding：It is ground into powder after moisture in material is removed；
Step 4 is activated：Material is carried out into activation heat treatment under nitrogen protective condition；
Step 5 is cleaned：Material is cleaned；
Step 6 is dried：Treatment is dried to material, high-ratio surface multistage mesoporous activated carbon is obtained final product.
2. the method that a kind of cotton stalk according to claim 1 prepares high-ratio surface multistage mesoporous activated carbon, its feature exists
In the activator aqueous solution in the step 2 is inorganic salts and the mixed solution of alkali.
3. the method that a kind of cotton stalk according to claim 2 prepares high-ratio surface multistage mesoporous activated carbon, its feature exists
In the activator aqueous solution in the step 2 is potassium carbonate and the mixed solution of potassium hydroxide.
4. the method that a kind of cotton stalk according to claim 1 prepares high-ratio surface multistage mesoporous activated carbon, its feature exists
In activator and the mass ratio of material are 2~3 in the step 2：7.5.
5. the method that a kind of cotton stalk according to claim 1 prepares high-ratio surface multistage mesoporous activated carbon, its feature exists
In the temperature of the step 3 activation heat treatment is 800 DEG C, and the time is 1~2h.
6. the method that a kind of cotton stalk according to claim 1 prepares high-ratio surface multistage mesoporous activated carbon, its feature exists
In the cleaning in the step 5 is respectively hydrochloric acid cleaning and deionized water cleaning.
7. the method that a kind of cotton stalk according to claim 6 prepares high-ratio surface multistage mesoporous activated carbon, its feature exists
In the concentration of hydrochloric acid in the step 5 is 1mol/L.
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| CN109037677A (en) * | 2017-06-12 | 2018-12-18 | 四川大学 | A kind of porous carbon negative pole material of lithium ion battery and preparation method thereof |
| CN109192540A (en) * | 2018-09-18 | 2019-01-11 | 中联西北工程设计研究院有限公司 | A kind of biomass carbonization product and manganese dioxide composite electrode material and preparation method thereof |
| CN110422837A (en) * | 2019-08-02 | 2019-11-08 | 新疆弘瑞达纤维有限公司 | A method of fluorescent carbon point is prepared using biomass material |
| CN111617737A (en) * | 2019-02-27 | 2020-09-04 | 河北工业大学 | Hierarchical porous carbon material and preparation method and application thereof |
| CN114804098A (en) * | 2022-03-18 | 2022-07-29 | 广东省农业科学院作物研究所 | Method for preparing porous activated carbon by adopting waste tobacco straws |
| CN115784227A (en) * | 2022-11-07 | 2023-03-14 | 河南农业大学 | Method for preparing porous carbon from agriculture and forestry biomass |
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| CN102586897A (en) * | 2011-12-21 | 2012-07-18 | 中国热带农业科学院海口实验站 | Method for preparing banana cellulose nanofibers by using steam explosion technology |
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| CN101112983A (en) * | 2007-06-08 | 2008-01-30 | 山东大学 | Preparation method of mizue brocade straw activated charcoal |
| CN101423213A (en) * | 2007-10-30 | 2009-05-06 | 山东科技大学 | Method for preparing active carbon |
| CN102586897A (en) * | 2011-12-21 | 2012-07-18 | 中国热带农业科学院海口实验站 | Method for preparing banana cellulose nanofibers by using steam explosion technology |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109037677A (en) * | 2017-06-12 | 2018-12-18 | 四川大学 | A kind of porous carbon negative pole material of lithium ion battery and preparation method thereof |
| CN109192540A (en) * | 2018-09-18 | 2019-01-11 | 中联西北工程设计研究院有限公司 | A kind of biomass carbonization product and manganese dioxide composite electrode material and preparation method thereof |
| CN111617737A (en) * | 2019-02-27 | 2020-09-04 | 河北工业大学 | Hierarchical porous carbon material and preparation method and application thereof |
| CN110422837A (en) * | 2019-08-02 | 2019-11-08 | 新疆弘瑞达纤维有限公司 | A method of fluorescent carbon point is prepared using biomass material |
| CN114804098A (en) * | 2022-03-18 | 2022-07-29 | 广东省农业科学院作物研究所 | Method for preparing porous activated carbon by adopting waste tobacco straws |
| CN114804098B (en) * | 2022-03-18 | 2024-02-06 | 广东省农业科学院作物研究所 | Method for preparing porous activated carbon from waste tobacco straw |
| CN115784227A (en) * | 2022-11-07 | 2023-03-14 | 河南农业大学 | Method for preparing porous carbon from agriculture and forestry biomass |
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| CN106672965B (en) | 2019-01-22 |
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