CN106348295A - Preparation method of walnut shell active carbon - Google Patents
Preparation method of walnut shell active carbon Download PDFInfo
- Publication number
- CN106348295A CN106348295A CN201611052459.1A CN201611052459A CN106348295A CN 106348295 A CN106348295 A CN 106348295A CN 201611052459 A CN201611052459 A CN 201611052459A CN 106348295 A CN106348295 A CN 106348295A
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- CN
- China
- Prior art keywords
- walnut shell
- preparation
- activated carbon
- active carbon
- carbonized
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
-
- 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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- 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 walnut shell active carbon. The preparation method comprises the following steps that walnut shells are cleaned, dried and crushed, and are then carbonized to obtain a carbonization material; KOH and the carbonization material are uniformly mixed; deionized water is added; room temperature impregnation is performed for 8h; under the inert gas atmosphere condition, heating and activation are performed; after the cooling, an activation material is obtained; the activation material is soaked by 5 mol/L of hydrochloric acid; filtering is performed; the deionized water is used for washing till the pH of filtrate is 7; drying is performed; the walnut shell active carbon is obtained. The reasonable resource utilization of wasted walnut shells is realized; the operation method is simple; the specific surface area of the walnut shell active carbon obtained through preparation can reach 2404 m<2>/g, and can be used as an electrode material of a supercapacitor.
Description
Technical field
The invention belongs to the preparation field of activated carbon is and in particular to a kind of preparation method of walnut shell activated carbon.
Background technology
With the excessive exploitation of fossil energy, non-renewable resources and energy worsening shortages, for the survival of mankind
Ecological environment day by day deteriorates, and energy crisis and problem of environmental pollution have caused people to pay much attention to.Faced with this situation, the world
The all development to cleaning, reproducible green novel energy source of each state propose more urgent requirement.Ultracapacitor is also known as electrification
Learn capacitor, be a kind of novel energy-storing element between traditional capacitor and battery, because it has ordinary capacitor power concurrently
Density is big and secondary cell energy density is high advantage and be widely used in electric automobile, mobile communication, Aero-Space and national defence
The multiple fields such as science and technology.In numerous electrode materials, activated carbon is because having that specific surface area is big, stable chemical nature, good conductivity,
The advantages of prepare simple and cheap, always manufacture the preferred material of electrode for super capacitor.
Extensively, the richness carbon such as coal, petroleum coke, timber, macromolecule resin and solid waste is former for the raw material sources of activated carbon
Material all can be used to prepare activated carbon.In recent years, the sharp increase of the expansion with activated carbon application field and demand, using renewable
Resource (as biomass etc.) is prepared activated carbon for raw material and is favored by people.China is a large agricultural country, Semen Juglandiss annual production
Ten thousand tons about more than 100, but most walnut shell directly abandons in process or burns, not only waste of resource, and can make
Become environmental pollution.Walnut shell tree material is hard, phosphorus content is higher, and composition, close to timber, is that a kind of Activated Carbon Production of high-quality is former
Material.At present, the activated carbon specific surface prepared for material with walnut shell is all relatively low, about 1000m2/ g is it is difficult to meet as super
The demand of capacitor electrode material.
Content of the invention
The present invention is intended to provide a kind of preparation method of walnut shell activated carbon, the activated carbon specific surface area height prepared.
The present invention is achieved by the following technical solutions.
The preparation method of walnut shell activated carbon it is characterised in that: comprise the following steps:
(1) take walnut shell through cleaning, after baking operation, being crushed, be crushed to granularity and be less than 0.2mm, be placed in retort
Charing process 1h at 600 DEG C in inert gas atmosphere, after carbonization terminates, collects carbonized material；
(2) carbonized material (1～5) in mass ratio that koh is obtained with step (1): 1 mixing, add and carbonized stock equal in quality
Deionized water, after room temperature immersion 8 h, under the conditions of inert gas atmosphere, is warming up to after 200 DEG C with the rate of heat addition of 10 DEG C/min
Constant temperature is dehydrated 30min, is then heated to 800 DEG C of activation 1h, naturally cools to room temperature, obtain activated material；
(3) activated material obtaining step (2) soak with hydrochloric acid 24 h of 5 mol/l, filters, be then washed with deionized to
Filtrate ph=7, forced air drying 4 h at 150 DEG C, then through vacuum drying, obtain final product walnut shell activated carbon.
Preferably, the noble gases in step (1) and step (2) are nitrogen.
Preferably, in step (2), koh and the mass ratio of carbonized material are 3:1.
Preferably, in step (3), vacuum drying condition is dried 5h at being 60 DEG C.
Advantages of the present invention:
Discarded walnut shell reasonable resourceization is utilized by the present invention, and operational approach is simple, the walnut shell activated carbon ratio preparing
Surface area is up to 2404 m2/ g, this activated carbon is used as ratio in the koh electrolyte of 3 mol/l for the electrode material for super capacitor
Electric capacity is up to 340 f/g, and has good heavy-current discharge characteristic and excellent cycle performance, after 1000 circulations, than
Capacity retention reaches 93.4%, can serve as electrode for super capacitor material.
Specific embodiment
Embodiment 1
The preparation method of walnut shell activated carbon it is characterised in that: comprise the following steps:
(1) take walnut shell through cleaning, after baking operation, being crushed, be crushed to granularity and be less than 0.2mm, be placed in retort
Charing process 1h at 600 DEG C in inert gas atmosphere, after carbonization terminates, collects carbonized material；
(2) carbonized material (1～5) in mass ratio that koh is obtained with step (1): 1 mixing, add and carbonized stock equal in quality
Deionized water, after room temperature immersion 8 h, under the conditions of inert gas atmosphere, is warming up to after 200 DEG C with the rate of heat addition of 10 DEG C/min
Constant temperature is dehydrated 30min, is then heated to 800 DEG C of activation 1h, naturally cools to room temperature, obtain activated material；
(3) activated material obtaining step (2) soak with hydrochloric acid 24 h of 5 mol/l, filters, be then washed with deionized to
Filtrate ph=7, forced air drying 4 h at 150 DEG C, then through vacuum drying, obtain final product walnut shell activated carbon.
Embodiment 2
The preparation method of walnut shell activated carbon it is characterised in that: comprise the following steps:
(1) take walnut shell through cleaning, after baking operation, being crushed, be crushed to granularity and be less than 0.2mm, be placed in retort
Charing process 1h at 600 DEG C in nitrogen atmosphere, after carbonization terminates, collects carbonized material；
(2) the carbonized material 3:1 in mass ratio that koh is obtained with step (1) is mixed, add the deionization with carbonized stock equal in quality
Water, after room temperature immersion 8 h, under the conditions of nitrogen atmosphere, is warming up to constant temperature dehydration after 200 DEG C with the rate of heat addition of 10 DEG C/min
30min, is then heated to 800 DEG C of activation 1h, naturally cools to room temperature, obtain activated material；
(3) activated material obtaining step (2) soak with hydrochloric acid 24 h of 5 mol/l, filters, be then washed with deionized to
Filtrate ph=7, forced air drying 4 h at 150 DEG C, then through vacuum drying, vacuum drying condition is dried 5h at being 60 DEG C, obtains final product
Walnut shell activated carbon.
Claims (4)
1. walnut shell activated carbon preparation method it is characterised in that: comprise the following steps:
(1) take walnut shell through cleaning, after baking operation, being crushed, be crushed to granularity and be less than 0.2mm, be placed in retort
Charing process 1h at 600 DEG C in inert gas atmosphere, after carbonization terminates, collects carbonized material；
(2) carbonized material (1～5) in mass ratio that koh is obtained with step (1): 1 mixing, add and carbonized stock equal in quality
Deionized water, after room temperature immersion 8 h, under the conditions of inert gas atmosphere, is warming up to after 200 DEG C with the rate of heat addition of 10 DEG C/min
Constant temperature is dehydrated 30min, is then heated to 800 DEG C of activation 1h, naturally cools to room temperature, obtain activated material；
(3) activated material obtaining step (2) soak with hydrochloric acid 24 h of 5 mol/l, filters, be then washed with deionized to
Filtrate ph=7, forced air drying 4 h at 150 DEG C, then through vacuum drying, obtain final product walnut shell activated carbon.
2. walnut shell activated carbon according to claim 1 preparation method it is characterised in that: in step (1) and step (2)
Noble gases be nitrogen.
3. walnut shell activated carbon according to claim 1 preparation method it is characterised in that: koh and carbonization in step (2)
The mass ratio of material is 3:1.
4. walnut shell activated carbon according to claim 1 preparation method it is characterised in that: vacuum drying in step (3)
Condition be 60 DEG C at 5h is dried.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611052459.1A CN106348295A (en) | 2016-11-25 | 2016-11-25 | Preparation method of walnut shell active carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611052459.1A CN106348295A (en) | 2016-11-25 | 2016-11-25 | Preparation method of walnut shell active carbon |
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| Publication Number | Publication Date |
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| CN106348295A true CN106348295A (en) | 2017-01-25 |
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| CN201611052459.1A Pending CN106348295A (en) | 2016-11-25 | 2016-11-25 | Preparation method of walnut shell active carbon |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107032349A (en) * | 2017-04-12 | 2017-08-11 | 南京工业大学 | A kind of method that activated carbon is prepared by racket leftover pieces |
| CN108010747A (en) * | 2017-11-13 | 2018-05-08 | 东华大学 | A kind of preparation method of ultracapacitor nitrogen sulphur codope activated carbon |
| CN109777741A (en) * | 2019-01-15 | 2019-05-21 | 昆明理工大学 | A kind of method that walnut shell efficiently utilizes |
| CN110028069A (en) * | 2019-04-18 | 2019-07-19 | 河南师范大学 | A kind of preparation method of the advanced carbon electrode material of multi-stage porous for supercapacitor |
| CN110176361A (en) * | 2019-06-11 | 2019-08-27 | 东北农业大学 | The preparation method of pig manure active carbon electrode material |
| CN110252247A (en) * | 2019-07-01 | 2019-09-20 | 河南城建学院 | A kind of spherical shape microballon shape walnut shell Quito hole carbon adsorbing material and its preparation method and application |
| CN110937601A (en) * | 2019-12-09 | 2020-03-31 | 天津大学 | Walnut shell based activated carbon, preparation method and application thereof |
| CN112758927A (en) * | 2020-12-22 | 2021-05-07 | 福建省农业科学院茶叶研究所 | Preparation method of tea stem-based activated carbon with high specific surface area |
| CN113555226A (en) * | 2021-08-04 | 2021-10-26 | 中国地质大学（北京） | Biomass supercapacitor electrode material and preparation method thereof |
| CN115418138A (en) * | 2022-08-16 | 2022-12-02 | 四川大学华西医院 | Positioning pen ink special for radiotherapy and preparation method thereof |
-
2016
- 2016-11-25 CN CN201611052459.1A patent/CN106348295A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107032349A (en) * | 2017-04-12 | 2017-08-11 | 南京工业大学 | A kind of method that activated carbon is prepared by racket leftover pieces |
| CN108010747B (en) * | 2017-11-13 | 2020-02-11 | 东华大学 | Preparation method of nitrogen-sulfur double-doped activated carbon for supercapacitor |
| CN108010747A (en) * | 2017-11-13 | 2018-05-08 | 东华大学 | A kind of preparation method of ultracapacitor nitrogen sulphur codope activated carbon |
| CN109777741A (en) * | 2019-01-15 | 2019-05-21 | 昆明理工大学 | A kind of method that walnut shell efficiently utilizes |
| CN109777741B (en) * | 2019-01-15 | 2022-01-04 | 昆明理工大学 | Method for efficiently utilizing walnut shells |
| CN110028069A (en) * | 2019-04-18 | 2019-07-19 | 河南师范大学 | A kind of preparation method of the advanced carbon electrode material of multi-stage porous for supercapacitor |
| CN110176361B (en) * | 2019-06-11 | 2021-04-20 | 东北农业大学 | Preparation method of pig manure activated carbon electrode material |
| CN110176361A (en) * | 2019-06-11 | 2019-08-27 | 东北农业大学 | The preparation method of pig manure active carbon electrode material |
| CN110252247A (en) * | 2019-07-01 | 2019-09-20 | 河南城建学院 | A kind of spherical shape microballon shape walnut shell Quito hole carbon adsorbing material and its preparation method and application |
| CN110937601A (en) * | 2019-12-09 | 2020-03-31 | 天津大学 | Walnut shell based activated carbon, preparation method and application thereof |
| CN112758927A (en) * | 2020-12-22 | 2021-05-07 | 福建省农业科学院茶叶研究所 | Preparation method of tea stem-based activated carbon with high specific surface area |
| CN113555226A (en) * | 2021-08-04 | 2021-10-26 | 中国地质大学（北京） | Biomass supercapacitor electrode material and preparation method thereof |
| CN113555226B (en) * | 2021-08-04 | 2022-06-14 | 中国地质大学（北京） | Biomass supercapacitor electrode material and preparation method thereof |
| CN115418138A (en) * | 2022-08-16 | 2022-12-02 | 四川大学华西医院 | Positioning pen ink special for radiotherapy and preparation method thereof |
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Application publication date: 20170125 |