CN115557499A - Preparation method of square bamboo activated carbon and square bamboo activated carbon - Google Patents
Preparation method of square bamboo activated carbon and square bamboo activated carbon Download PDFInfo
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- CN115557499A CN115557499A CN202211470654.1A CN202211470654A CN115557499A CN 115557499 A CN115557499 A CN 115557499A CN 202211470654 A CN202211470654 A CN 202211470654A CN 115557499 A CN115557499 A CN 115557499A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 240000003096 Chimonobambusa quadrangularis Species 0.000 title claims abstract description 93
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 20
- 239000002904 solvent Substances 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000003213 activating effect Effects 0.000 claims abstract description 18
- 238000007598 dipping method Methods 0.000 claims abstract description 11
- 238000010000 carbonizing Methods 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 238000010025 steaming Methods 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 20
- 238000003763 carbonization Methods 0.000 claims description 20
- 230000004913 activation Effects 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000002585 base Substances 0.000 claims description 17
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 14
- 238000009835 boiling Methods 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract description 24
- 235000017491 Bambusa tulda Nutrition 0.000 abstract description 24
- 241001330002 Bambuseae Species 0.000 abstract description 24
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract description 24
- 239000011425 bamboo Substances 0.000 abstract description 24
- 230000008569 process Effects 0.000 abstract description 9
- 238000005336 cracking Methods 0.000 abstract description 8
- 238000001179 sorption measurement Methods 0.000 abstract description 8
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052740 iodine Inorganic materials 0.000 abstract description 7
- 239000011630 iodine Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000004898 kneading Methods 0.000 abstract description 2
- 239000011230 binding agent Substances 0.000 abstract 1
- 238000005470 impregnation Methods 0.000 description 10
- 239000011148 porous material Substances 0.000 description 7
- 230000006872 improvement Effects 0.000 description 6
- 229920005610 lignin Polymers 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 244000302661 Phyllostachys pubescens Species 0.000 description 3
- 235000003570 Phyllostachys pubescens Nutrition 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000003795 desorption Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 241001166076 Diapheromera femorata Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012229 microporous material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- 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
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Abstract
The invention discloses a preparation method of square bamboo activated carbon and the square bamboo activated carbon, and belongs to the technical field of activated carbon. The preparation method of the square bamboo activated carbon comprises the following steps: (1) cutting the square bamboo into short sections; (2) putting the short section into a solvent to boil; (3) putting the short section into steam for steaming; (4) drying the short section and then carbonizing; (5) dipping the short section in a reinforcing base; (6) And drying the short sections and activating to obtain the square bamboo activated carbon. The preparation method of the invention has simple process, gets rid of the traditional activated carbon powder forming process, does not need to add binders and other kneading forming auxiliary materials, obviously reduces the production cost of the hollow activated carbon, and has more environment-friendly preparation process. The prepared square bamboo activated carbon has extremely low cracking rate, still well maintains the original cylindrical shape of the square bamboo raw bamboo, has higher strength and extremely high iodine value, and shows that the square bamboo activated carbon can obtain better adsorption performance and longer service cycle when in use.
Description
Technical Field
The invention relates to the technical field of activated carbon, in particular to the technical field of activated carbon prepared by taking square bamboo as a raw material, and specifically relates to a preparation method of square bamboo activated carbon and the square bamboo activated carbon.
Background
The square bamboo is an economic bamboo commonly existing in south China, is about 3-8 meters high and about 1-4 centimeters thick, and generally has a hollow structure. The bamboo stick is usually applied to garden appreciation due to the slender size, and is also applied to the manufacture of the walking stick due to the high brittleness, so that the economic benefit of the square bamboo is very low and the utilization value is not high at present. But the square bamboo has short growth period and high survival rate, and is an environment-friendly material.
At present, bamboo charcoal tubes are produced on the market by taking moso bamboos as raw materials and are used for purifying indoor air. However, the moso bamboo is relatively thick and is prepared by primary carbonization, so the moso bamboo is easy to crack and pulverize, and the purification effect is poor. For example, chinese patent No. CN105643750a discloses a process for obtaining carbonized round bamboo by heating with high-temperature steam to soften lignin and rapidly carbonize fiber. However, the bamboo activated carbon with high adsorption index needs to be further activated by carbon, so that the original shape and high strength of the bamboo charcoal cylinder are more difficult to ensure.
Disclosure of Invention
The invention mainly aims to provide a preparation method of provider bamboo activated carbon and the provider bamboo activated carbon, and solves the technical problem that bamboo activated carbon in the prior art cannot give consideration to adsorption performance, form and strength.
In order to achieve the above object, according to a first aspect of the present invention, there is provided a method for preparing square bamboo activated carbon, the technical scheme being as follows:
the preparation method of the square bamboo activated carbon comprises the following steps:
(1) Cutting the square bamboo into short sections;
(2) Putting the short section into a solvent and boiling;
(3) Putting the short section into steam for steaming;
(4) Drying the short section and then carbonizing;
(5) Dipping the short section into a reinforcing base;
(6) And drying the short section and activating to obtain the square bamboo activated carbon.
As a further improvement of the first aspect of the invention, the outer diameter of the square bamboo is 2-3 cm, the wall thickness is 3-4 mm, and the length of the short section is 2-3 cm.
As a further improvement of the first aspect of the invention, the solvent is water or lye; boiling for 1-3 h.
As a further improvement of the first aspect of the present invention, the solvent is a sodium hydroxide solution with a mass fraction of 3 to 10%.
As a further development of the first aspect of the invention, the steam is water vapor; steaming for 1-3 h.
As a further improvement of the first aspect of the invention, the carbonization temperature is 400-600 ℃, and the carbonization time is 1-2 h.
As a further development of the first aspect of the invention, the reinforcing group is a silica sol.
As a further improvement of the first aspect of the invention, the mass fraction of the silica sol is 15-20%, the silica sol is immersed in a reaction kettle at 180-220 ℃ for 5-7 h, or the silica sol is immersed at normal temperature and normal pressure for 5-7 h, and the immersed silica sol is kept stand for 5-7 h.
As a further improvement of the first aspect of the invention, the activation temperature is 850-950 ℃, the activation time is 3-5 h, and the activating agent is water vapor.
In order to achieve the above object, according to a second aspect of the present invention, there is also provided bamboo activated carbon, the technical solution is as follows:
activated carbon prepared by the method of the first aspect.
The preparation method of the square bamboo activated carbon and the square bamboo activated carbon have the following advantages:
the hollow bamboo tube structure naturally formed in the square bamboo is used as a structural framework foundation of the hollow activated carbon, powder making and forming are not needed, and the preparation process and the raw material cost are obviously shortened.
The boiling can improve vertical moisture permeability, increase the inside space of bamboo timber, reduce the degree of difficulty of moisture migration, can slowly deviate from the inside lignin of bamboo timber simultaneously. Because the lignin in the bamboo wood can be dissolved in the alkali liquor, when the sodium hydroxide solution is selected and boiled, the lignin can be quickly removed, and the cracking phenomenon caused by the structural damage caused by the high-temperature quick decomposition of the lignin in the square bamboo in the subsequent heat treatment process is reduced.
The steam can increase the internal energy of the water molecules of the bamboo, the activity is enhanced, and the connecting force among the structural components of the bamboo is reduced, so that the bamboo is softened. The bamboo softening reduces the deformation resistance of the bamboo, reduces the drying stress, reduces the possibility of cracking, and ensures that the dehydrated structure tends to be densified.
During the carbonization process, the fiber components in the square bamboo can be removed preliminarily, and macropores in the active carbon are produced preliminarily.
The reinforcing base can be sufficiently dispersed in the carbonized square bamboo structure by impregnation. The preferred impregnation process is to complete the impregnation in a reaction vessel, so that the impregnation efficiency can be improved by pressure impregnation. The silica sol is a dispersion of nano-scale silica particles in water or solvent, and permeates into the carbonized square bamboo structure after impregnation to occupy the volatilization and precipitation position in the square bamboo, and Si0 with higher strength can be formed in the square bamboo activated carbon after heat treatment 2 The monomer structure remolds the skeleton texture, strengthens the intensity of bamboo activated carbon.
In conclusion, the preparation method of the square bamboo activated carbon with the hollow structure, which does not need a forming process, is simple in process, gets rid of the traditional activated carbon powder forming process, does not need to add bonding agents and other kneading forming auxiliary materials, remarkably reduces the production cost of the hollow activated carbon, and is more environment-friendly. The verification proves that the square bamboo activated carbon prepared by the preparation method disclosed by the invention is extremely low in cracking rate, the original cylindrical shape of the square bamboo raw bamboo is still well maintained, the outer diameter of the square bamboo activated carbon is 15-20 mm, the wall thickness is 1-3 mm, the square bamboo activated carbon is easy to transport and use, and has higher strength and extremely high iodine value, so that the square bamboo activated carbon can obtain better adsorption performance and longer service cycle when in use, can be applied to a wider field, and improves the economic value of the square bamboo.
The invention is further described with reference to the following figures and detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to assist in understanding the invention, and are included to explain the invention and their equivalents and not limit it unduly.
FIG. 1 is a scanning electron micrograph of square bamboo activated carbon of example 2.
FIG. 2 is a scanning electron microscope photograph of square bamboo activated carbon of example 2.
FIG. 3 is a graph showing nitrogen adsorption and desorption of square bamboo activated carbon in example 2.
Figure 4 is a pore structure distribution diagram of square bamboo activated carbon of example 2.
Detailed Description
The invention will be described more fully hereinafter with reference to the accompanying drawings. Those skilled in the art will be able to implement the invention based on these teachings. Before describing the present invention in detail with reference to the accompanying drawings, it is to be noted that:
the technical solutions and features provided in the present invention in the respective sections including the following description may be combined with each other without conflict.
Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.
With respect to terms and units in the present invention. The terms "comprising," "having," and any variations thereof in the description and claims of this invention and in the related section are intended to cover a non-exclusive inclusion.
The specific implementation mode of the preparation method of the square bamboo activated carbon comprises the following steps:
(1) Cutting the square bamboo into short sections: the outer diameter of the square bamboo is 2-3 cm, the wall thickness is 3-4 mm, and the length of the short section is 2-3 cm.
(2) Putting the short section into a solvent for boiling: the solvent is water or sodium hydroxide solution with the mass fraction of 3-10%, and the boiling is carried out for 1-3 h.
(3) And putting the short section into steam to steam for 1-3 h.
(4) And (3) drying the short section and then carbonizing: the carbonization temperature is 400-600 ℃, and the carbonization time is 1-2 h.
(5) Dipping the pup joint in a reinforcing base: the reinforcing base is 15-20% silica sol, and is soaked in a reaction kettle at 180-220 ℃ for 5-7 h, or is soaked at normal temperature and pressure for 5-7 h, and is kept stand for 5-7 h after being soaked.
(6) Drying the short sections and then activating to obtain square bamboo activated carbon; the activation temperature is 850-950 ℃, the activation time is 3-5 h, and the activating agent is water vapor.
The specific embodiment of the square bamboo activated carbon of the invention is prepared by the preparation method.
The advantageous effects of the present invention are illustrated below by specific examples.
Example 1
The preparation method of the square bamboo activated carbon comprises the following steps:
(1) Cutting the square bamboo into short sections: the outer diameter of the square bamboo is 2-3 cm, the wall thickness is 3-4 mm, and the length of the short section is 2cm.
(2) Putting the short section into a solvent for boiling: the solvent is water, and the boiling is carried out for 2 hours.
(3) And putting the short section into steam to be steamed for 1 hour.
(4) And (3) drying the short section and then carbonizing: the carbonization temperature is 600 ℃, and the carbonization time is 1h.
(5) Dipping the pup joint in a reinforcing base: the reinforcing base is 15% silica sol by mass, and is dipped at normal temperature and normal pressure for 6h, and is taken out and kept stand for 6h after being dipped.
(6) Drying the short sections and then activating to obtain square bamboo activated carbon; the activation temperature is 900 ℃, the activation time is 3h, and the activating agent is water vapor.
Example 2
The preparation method of the square bamboo activated carbon comprises the following steps:
(1) Cutting the square bamboo into short sections: the outer diameter of the square bamboo is 2-3 cm, the wall thickness is 3-4 mm, and the length of the short section is 2cm.
(2) Putting the short section into a solvent for boiling: the solvent is water and is boiled for 2 hours.
(3) And putting the short section into steam to be steamed for 1 hour.
(4) And (3) drying the short section and then carbonizing: the carbonization temperature is 600 ℃, and the carbonization time is 1h.
(5) Dipping the pup joint in a reinforcing base: the reinforcing base is silica sol with the mass fraction of 20%, the impregnation is carried out at normal temperature and normal pressure for 6 hours, and the reinforcing base is taken out and stands for 6 hours after the impregnation.
(6) Drying the short sections and then activating to obtain square bamboo activated carbon; the activation temperature is 900 ℃, the activation time is 3h, and the activating agent is water vapor.
Example 3
The preparation method of the square bamboo activated carbon comprises the following steps:
(1) Cutting the square bamboo into short sections: the outer diameter of the square bamboo is 2-3 cm, the wall thickness is 3-4 mm, and the length of the short section is 2cm.
(2) Putting the short section into a solvent for boiling: the solvent is water and is boiled for 2 hours.
(3) And putting the short section into steam to be steamed for 1 hour.
(4) And (3) drying the short section and then carbonizing: the carbonization temperature is 600 ℃, and the carbonization time is 1h.
(5) Dipping the pup joint in a reinforcing base: the reinforcing base is 15% silica sol by mass, and is soaked in a reaction kettle at the soaking temperature of 200 ℃ for 6 hours.
(6) Drying the short sections and then activating to obtain square bamboo activated carbon; the activation temperature is 900 ℃, the activation time is 3h, and the activating agent is water vapor.
Example 4
The preparation method of the square bamboo activated carbon comprises the following steps:
(1) Cutting the square bamboo into short sections: the outer diameter of the square bamboo is 2-3 cm, the wall thickness is 3-4 mm, and the length of the short section is 2cm.
(2) Putting the short section into a solvent for boiling: the solvent is 8 percent sodium hydroxide solution by mass percent and is boiled for 2 hours.
(3) And putting the short section into steam to be steamed for 1 hour.
(4) And (3) drying the short section and then carbonizing: the carbonization temperature is 600 ℃, and the carbonization time is 1h.
(5) Dipping the pup joint in a reinforcing base: the reinforcing base is 15% silica sol by mass, and is impregnated at normal temperature and normal pressure for 6 hours, and the reinforcing base is kept stand for 6 hours after impregnation.
(6) Drying the short sections and then activating to obtain square bamboo activated carbon; the activation temperature is 900 ℃, the activation time is 3h, and the activating agent is water vapor.
Example 5
The preparation method of the square bamboo activated carbon comprises the following steps:
(1) Cutting the square bamboo into short sections: the outer diameter of the square bamboo is 2-3 cm, the wall thickness is 3-4 mm, and the length of the short section is 2cm.
(2) Putting the short section into a solvent for boiling: the solvent is sodium hydroxide solution with the mass fraction of 8%, and the solution is boiled for 2 hours.
(3) And putting the short section into steam to be steamed for 1 hour.
(4) And (3) drying the short section and then carbonizing: the carbonization temperature is 600 ℃, and the carbonization time is 1h.
(5) Dipping the pup joint in a reinforcing base: the reinforcing base is 15% silica sol by mass, and is soaked in a reaction kettle at the soaking temperature of 200 ℃ for 6 hours.
(6) Drying the short sections and then activating to obtain square bamboo activated carbon; the activation temperature is 900 ℃, the activation time is 3h, and the activating agent is water vapor.
Comparative example
Directly carbonizing and activating the cut raw bamboo of the square bamboo: the carbonization temperature is 600 ℃, the carbonization time is 1h, the activation temperature is 900 ℃, and the activation time is 3h.
Table 1 shows iodine value, compressive strength and cracking rate of square bamboo activated carbon prepared in examples 1 to 5 and comparative example.
TABLE 1
As can be seen from Table 1, the iodine values of the square bamboo activated carbons of examples 1 to 5 were all over 800mg/g and had good compressive strength. Compared with a comparative example, the iodine value and the compressive strength are obviously improved and the cracking rate is obviously reduced after the digestion and the impregnation treatment.
The iodine value is tested by adopting the 'GB/T14296.8-2015 determination of iodine adsorption value of wood activated carbon experimental method'.
The compressive strength is tested by adopting a GB/T1964-1996 porous ceramic compressive strength test method.
The cracking rate is the proportion of the short sections with cracks or fractures on the surface in the total number of the short sections after activation.
It was verified that the square bamboo activated carbon of examples 1 to 5 was in the natural shape of the original bamboo, and had good appearance quality and less cracking and deformation.
FIG. 1 is a scanning electron microscope photomicrograph of square bamboo activated carbon of example 2. FIG. 2 is a photograph taken by a high scanning electron microscope of square bamboo activated carbon of example 2. As can be seen from FIGS. 1-2, the square bamboo activated carbon has a large number of macroporous structures with a size of 1-20 μm, and the pore structures are uniformly distributed.
FIG. 3 is a graph showing nitrogen adsorption and desorption of square bamboo activated carbon in example 2. Figure 4 is a pore structure distribution diagram of square bamboo activated carbon of example 2. As can be seen from fig. 3, the square bamboo activated carbon has a type i isothermal adsorption and desorption curve, which reflects the micropore filling phenomenon on the micropore adsorbent, confirming that the square bamboo activated carbon is a microporous material. Meanwhile, the maximum ratio of micropores with the diameter of 0.563nm can be verified according to a pore structure distribution diagram. According to the pore structure analysis, the average pore diameter of the square bamboo activated carbon is 1.75nm, and the total pore volume is 0.3764cm 3 Per g, specific surface area of 859.087m 2 /g。
The contents of the present invention have been explained above. Those skilled in the art will be able to implement the invention based on these teachings. All other embodiments, which can be derived by a person skilled in the art from the above description without inventive step, shall fall within the scope of protection of the present invention.
Claims (10)
1. The preparation method of the square bamboo activated carbon comprises the following steps:
(1) Cutting the square bamboo into short sections;
(2) Putting the short section into a solvent and boiling;
(3) Putting the short section into steam for steaming;
(4) Drying the short section and then carbonizing;
(5) Dipping the short section into a reinforcing base;
(6) And drying the short sections and activating to obtain the square bamboo activated carbon.
2. A method of preparing square bamboo activated carbon as claimed in claim 1, wherein: the outer diameter of the square bamboo is 2-3 cm, the wall thickness is 3-4 mm, and the length of the short section is 2-3 cm.
3. A method of preparing square bamboo activated carbon as claimed in claim 1, wherein: the solvent is water or alkali liquor; boiling for 1-3 h.
4. A method of preparing square bamboo activated carbon as claimed in claim 3, wherein: the solvent is sodium hydroxide solution with the mass fraction of 3-10%.
5. A method of preparing square bamboo activated carbon as claimed in claim 1, wherein: the steam is water vapor; steaming for 1-3 h.
6. A method of preparing square bamboo activated carbon as claimed in claim 1, wherein: the carbonization temperature is 400-600 ℃, and the carbonization time is 1-2 h.
7. A method of preparing square bamboo activated carbon as claimed in claim 1, wherein: the reinforcing group is silica sol.
8. A method of preparing square bamboo activated carbon as claimed in claim 7, wherein: the mass fraction of the silica sol is 15-20%; dipping in a reaction kettle at 180-220 ℃ for 5-7 h, or dipping at normal temperature and pressure for 5-7 h, and standing for 5-7 h.
9. A method of preparing square bamboo activated carbon as claimed in claim 1, wherein: the activation temperature is 850-950 ℃, the activation time is 3-5 h, and the activating agent is water vapor.
10. Activated carbon of square bamboo, its characteristic lies in: prepared by the preparation process according to any one of claims 1 to 9.
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