CN106348291A - Method for preparing active carbon by utilizing urban sludge - Google Patents
Method for preparing active carbon by utilizing urban sludge Download PDFInfo
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- CN106348291A CN106348291A CN201610891377.XA CN201610891377A CN106348291A CN 106348291 A CN106348291 A CN 106348291A CN 201610891377 A CN201610891377 A CN 201610891377A CN 106348291 A CN106348291 A CN 106348291A
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- activated carbon
- sludge
- grinding
- neutrality
- baking
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 239000010802 sludge Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910052799 carbon Inorganic materials 0.000 title abstract description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000000227 grinding Methods 0.000 claims abstract description 21
- 238000001354 calcination Methods 0.000 claims abstract description 20
- 238000005406 washing Methods 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 37
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 28
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 239000013335 mesoporous material Substances 0.000 abstract description 13
- 239000007772 electrode material Substances 0.000 abstract description 12
- 230000007935 neutral effect Effects 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract 2
- 239000011358 absorbing material Substances 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 20
- 238000003756 stirring Methods 0.000 description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 10
- 238000001914 filtration Methods 0.000 description 10
- 239000010865 sewage Substances 0.000 description 10
- 239000003990 capacitor Substances 0.000 description 7
- 239000002699 waste material Substances 0.000 description 7
- 239000003610 charcoal Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000002250 absorbent Substances 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 229960000935 dehydrated alcohol Drugs 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000985 reactive dye Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
-
- 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
-
- 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
-
- 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
- C01P2006/40—Electric properties
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Carbon And Carbon Compounds (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides a method for preparing active carbon by utilizing urban sludge. The method comprises the following steps: a) standing by, drying, crushing and grinding the urban sludge, and then calcining under a vacuum condition; b) removing inorganic substance from the matter acquired in the step a); c) regulating pH value of a solution obtained in the step b) to be alkaline, washing till being neutral, and then washing with absolute ethyl alcohol; d) baking and grinding the matter obtained in the step c), thereby obtaining the active carbon. According to the method provided by the invention, the urban sludge is taken as the raw material and then is successively processed according to the steps of standing by, drying, crushing, grinding, vacuum calcining, removing inorganic substance, regulating pH value to be alkaline, washing till being neutral, and then washing with absolute ethyl alcohol, baking and grinding, so that the sludge-base activated carbon with larger specific area can be acquired. The active carbon is a mesoporous material, can be used as an electrode material and also can be used as an absorbing material.
Description
Technical field
The invention belongs to materials science field, more particularly, to a kind of method preparing activated carbon using municipal sludge.
Background technology
With economic sustained and rapid development, global problem of environmental pollution is increasingly serious.Therefore, the recycling of waste is
A current hot subject.Act on sustainable development idea, develop resource-conserving and environmentally friendly suction using waste
Enclosure material, not only can turn waste into wealth, and can also mitigate the ambient pressure that waste brings simultaneously, have the meaning of reality.But, how
Domestic sludge and industrial sludge are turned waste into wealth becomes a urgent problem.
Zhou Weijia et al. discloses one kind in the patent of Patent No. cn103779111a and utilizes the super electricity of excess sludge
The method holding electrode material, the method can prepare the electrode material for super capacitor of high electrochemical performance.But, the method
The electrode material obtaining not only includes carbon, also includes nitrogen, phosphorus and metallic element, is not activated carbon, and its specific surface area is relatively
Low.
Activated carbon, as a kind of charcoal of α type, short texture, has huge surface area and good absorption property, extensively uses
Decolour, refine, purifying and deodorization in aspects such as saccharide, oils and fatss, food, medicine；Adsorbed gas, recovery are used on metallurgical industry
Solvent, the catalyst carrier of Production of PVC, catalyst of reactive dye intermediate etc., also show stable chemical nature,
The homogeneous feature of structure is it is also possible to as ideal electrode material.Therefore, inventor considers to extract with industrial sludge from domestic sludge
Go out activated carbon, not only meet the demand of activated carbon, also municipal sludge is turned waste into wealth, mitigate domestic sludge with industrial sludge to ring
The pollution in border.
Content of the invention
In view of this, it is an object of the invention to provide a kind of method preparing activated carbon using municipal sludge, the present invention
The method process is simple providing, and the activated carbon reference area preparing is larger.
The invention provides a kind of method preparing activated carbon using municipal sludge, comprising:
A), after municipal sludge being stood, is dried, pulverizing, grinding, calcine under vacuum；
B) inorganic matters in the material that removal step a) obtains；
C) the ph value of the solution that regulating step b) obtains, to alkalescence, is washed and is used absolute ethanol washing to neutrality；
D) material that step c) obtains is toasted, grinds, obtain activated carbon.
The present invention with municipal sludge as raw material, it is carried out successively stand, is dried, pulverizes, grinding, vacuum calcining, removal
Inorganic matters, adjust ph value to alkalescence, wash to neutral, dehydrated alcohol is processed, it is larger to obtain specific surface area after baking and milled processed
Sludge-based activated carbon.Described activated carbon is mesoporous material, can use as electrode material it is also possible to make as adsorbing material
With.
With municipal sludge as raw material, described municipal sludge is selected from industrial sludge and/or domestic sludge to the present invention.
First by municipal sludge stand 1～24h, be dried, pulverize, grind after calcine under vacuum.Wherein, institute
The temperature stating calcining is 200～1000 DEG C, and the time of described calcining is 1～12h；The speed of described grinding is 500～800r/
min.
Then remove the inorganic matters in the material after calcining, specifically, can remove in accordance with the following methods: after calcining
Material with dilute sulfuric acid soak 1～10h, wash to neutrality.Before being soaked with dilute sulfuric acid, also include by calcining after material with
Deionized water mixes, and preferably stirs 0.5～6h.
Again by the solution obtaining adjust ph value to alkalescence, be preferably adjusted to 10～12, be then washed with deionized in
Property, then with absolute ethanol washing 1～5 time.
After material after washing is carried out toasting, grinds, you can moral Austria activated carbon.Wherein, the temperature of described baking is 100
～500 DEG C, the time of described baking is 1～12h.The speed of described grinding is 500～800r/min.
The sludge-based activated carbon of the method preparation that the present invention provides is mesoporous material, and its specific surface area is in 800m2/ more than g,
It is preferably 950～2000m2/g.
Not only processing step is simple for the method that the present invention provides, it is with low cost to produce, and the activated carbon ratio preparing
Surface area is larger, and municipal sludge is turned waste into wealth, and mitigates domestic sludge and the pollution to environment for the industrial sludge.
Brief description
Fig. 1 is that the absorbent charcoal material of the embodiment of the present invention 1 preparation is bent as the cyclic voltammetric of electrode material for super capacitor
Line；
Fig. 2 is the charging and discharging curve as electrode material for super capacitor for the absorbent charcoal material of the embodiment of the present invention 1 preparation.
Specific embodiment
Embodiment 1
(1) municipal sludge acquired in from sewage treatment plant is put into standing 1h in vessel；
(2) after treating that step (1) standing completes, after being dried, pulverize, grinding, under vacuum, with 200 DEG C
Temperature calcination 5h；
(3), after the completion for the treatment of step (2), the deionized water of certain proportion is added to stir in material obtained by step (2)
0.5h, is soaked after 1h with dilute sulfuric acid, washs to neutrality；
(4) with the naoh solution of 2mol/l, the ph value of step (3) resulting solution is adjusted to 11 about；
(5) step (4) resulting solution is washed with deionized filtration to neutrality, then with washes of absolute alcohol 1 time；
(6) after the completion for the treatment of step (5), gained material is put into heater box, after 100 DEG C of baking 1h, grind, be finally obtained
The activated carbon of specific area.
Described activated carbon is mesoporous material, and specific surface area is 1301.8m2/ g, macropore radius are 25687nm, transitional pore half
Footpath is 10598nm, and pore radius are 98.5nm.
Using the activated carbon of embodiment 1 acquisition as electrode material for super capacitor, it is circulated with voltammetric scan, result
Referring to Fig. 1, Fig. 1 is that the absorbent charcoal material of the embodiment of the present invention 1 preparation is bent as the cyclic voltammetric of electrode material for super capacitor
Line；
Using the activated carbon of embodiment 1 acquisition as electrode material for super capacitor, it is carried out with charge-discharge test, result is joined
See Fig. 2, Fig. 2 is the charging and discharging curve as electrode material for super capacitor for the absorbent charcoal material of the embodiment of the present invention 1 preparation.
Embodiment 2
(1) municipal sludge acquired in from sewage treatment plant is put into standing 2h in vessel；
(2) after treating that step (1) standing completes, after being dried, pulverize, grinding, under vacuum, with 350 DEG C
Temperature calcination 1h；
(3), after the completion for the treatment of step (2), the deionized water of certain proportion is added to stir 1h in material obtained by step (2),
Soaked after 2h with dilute sulfuric acid, wash to neutrality；
(4) with the naoh solution of 2mol/l, the ph value of step (3) resulting solution is adjusted to 11 about；
(5) step (4) resulting solution is washed with deionized filtration to neutrality, then with washes of absolute alcohol 2 times；
(6) after the completion for the treatment of step (5), gained material is put into heater box, after 150 DEG C of baking 4h, grind, be finally obtained
The activated carbon of specific area.
Described activated carbon is mesoporous material, and specific surface area is 887.8m2/ g, macropore radius are 28652nm, transition pore radius
For 9865nm, pore radius are 110.9nm.
Embodiment 3
(1) municipal sludge acquired in from sewage treatment plant is put into standing 4h in vessel；
(2) after treating that step (1) standing completes, after being dried, pulverize, grinding, under vacuum, with 480 DEG C
Temperature calcination 5h；
(3), after the completion for the treatment of step (2), the deionized water of certain proportion is added to stir 2h in material obtained by step (2),
Soaked after 3h with dilute sulfuric acid, wash to neutrality；
(4) with the naoh solution of 2mol/l, the ph value of step (3) resulting solution is adjusted to 10 about；
(5) step (4) resulting solution is washed with deionized filtration to neutrality, then with washes of absolute alcohol 3 times；
(6) after the completion for the treatment of step (5), gained material is put into heater box, after 200 DEG C of baking 5h, grind, be finally obtained
The activated carbon of specific area.
Described activated carbon is mesoporous material, and specific surface area is 1100.5m2/ g, macropore radius are 31250nm, transitional pore half
Footpath is 15963nm, and pore radius are 128.6nm.
Embodiment 4
(1) municipal sludge acquired in from sewage treatment plant is put into standing 6h in vessel；
(2) after treating that step (1) standing completes, after being dried, pulverize, grinding, under vacuum, with 500 DEG C
Temperature calcination 5h；
(3), after the completion for the treatment of step (2), the deionized water of certain proportion is added to stir in material obtained by step (2)
2.5h, is soaked after 4h with dilute sulfuric acid, washs to neutrality；
(4) with the naoh solution of 2mol/l, the ph value of step (3) resulting solution is adjusted to 12 about；
(5) step (4) resulting solution is washed with deionized filtration to neutrality, then with washes of absolute alcohol 5 times；
(6) after the completion for the treatment of step (5), gained material is put into heater box, after 250 DEG C of baking 5h, grind, be finally obtained
The activated carbon of specific area.
Described activated carbon is mesoporous material, and specific surface area is 982.9m2/ g, macropore radius are 29652nm, transition pore radius
For 9635nm, pore radius are 85.3nm.
Embodiment 5
(1) municipal sludge acquired in from sewage treatment plant is put into standing 8h in vessel；
(2) after treating that step (1) standing completes, after being dried, pulverize, grinding, under vacuum, with 550 DEG C
Temperature calcination 8h；
(3), after the completion for the treatment of step (2), the deionized water of certain proportion is added to stir 3h in material obtained by step (2),
Soaked after 5h with dilute sulfuric acid, wash to neutrality；
(4) with the naoh solution of 2mol/l, the ph value of step (3) resulting solution is adjusted to 11 about；
(5) step (4) resulting solution is washed with deionized filtration to neutrality, then with washes of absolute alcohol 3 times；
(6) after the completion for the treatment of step (5), gained material is put into heater box, after 300 DEG C of baking 5h, grind, be finally obtained
The activated carbon of specific area.
Described activated carbon is mesoporous material, and specific surface area is 1023.5m2/ g, macropore radius are 22356nm, transitional pore half
Footpath is 18692nm, and pore radius are 114.6nm.
Embodiment 6
(1) municipal sludge acquired in from sewage treatment plant is put into standing 11h in vessel；
(2) after treating that step (1) standing completes, after being dried, pulverize, grinding, under vacuum, with 600 DEG C
Temperature calcination；
(3), after the completion for the treatment of step (2), the deionized water of certain proportion is added to stir 3h in material obtained by step (2),
Soaked after 6h with dilute sulfuric acid, wash to neutrality；
(4) with the naoh solution of 2mol/l, the ph value of step (3) resulting solution is adjusted to 12 about；
(5) step (4) resulting solution is washed with deionized filtration to neutrality, then with washes of absolute alcohol 5 times；
(6) after the completion for the treatment of step (5), gained material is put into heater box, after 400 DEG C of baking 6h, grind, be finally obtained
The activated carbon of specific area.
Described activated carbon is mesoporous material, and specific surface area is 1089.3m2/ g, macropore radius are 22356nm, transitional pore half
Footpath is 18692nm, and pore radius are 114.6nm.
Embodiment 7
(1) municipal sludge acquired in from sewage treatment plant is put into standing 15h in vessel；
(2) after treating that step (1) standing completes, after being dried, pulverize, grinding, under vacuum, with 800 DEG C
Temperature calcination 8h；
(3), after the completion for the treatment of step (2), the deionized water of certain proportion is added to stir 4h in material obtained by step (2),
Soaked after 7h with dilute sulfuric acid, wash to neutrality；
(4) with the naoh solution of 2mol/l, the ph value of step (3) resulting solution is adjusted to 11 about；
(5) step (4) resulting solution is washed with deionized filtration to neutrality, then with washes of absolute alcohol 2 times；
(6) after the completion for the treatment of step (5), gained material is put into heater box, after 150 DEG C of baking 12h, grind, final system
Obtain the activated carbon of specific area.
Described activated carbon is mesoporous material, and specific surface area is 1569.7m2/ g, macropore radius are 24567nm, transitional pore half
Footpath is 18857nm, and pore radius are 96.8nm.
Specific embodiment 8
(1) municipal sludge acquired in from sewage treatment plant is put into standing 18h in vessel；
(2) after treating that step (1) standing completes, after being dried, pulverize, grinding, under vacuum, with 750 DEG C
Temperature calcination 8h；
(3), after the completion for the treatment of step (2), the deionized water of certain proportion is added to stir 5h in material obtained by step (2),
Soaked after 8h with dilute sulfuric acid, wash to neutrality；
(4) with the naoh solution of 2mol/l, the ph value of step (3) resulting solution is adjusted to 11 about；
(5) step (4) resulting solution is washed with deionized filtration to neutrality, then with washes of absolute alcohol 4 times；
(6) after the completion for the treatment of step (5), gained material is put into heater box, after 350 DEG C of baking 8h, grind, be finally obtained
The activated carbon of specific area.
Described activated carbon is mesoporous material, and specific surface area is 896.5m2/ g, macropore radius are 21235nm, transition pore radius
For 9325nm, pore radius are 78.5nm.
Embodiment 9
(1) municipal sludge acquired in from sewage treatment plant is put into standing 21h in vessel；
(2) after treating that step (1) standing completes, after being dried, pulverize, grinding, under vacuum, with 850 DEG C
Temperature calcination 5h；
(3), after the completion for the treatment of step (2), the deionized water of certain proportion is added to stir 3h in material obtained by step (2),
Soaked after 9h with dilute sulfuric acid, wash to neutrality；
(4) with the naoh solution of 2mol/l, the ph value of step (3) resulting solution is adjusted to 11 about；
(5) step (4) resulting solution is washed with deionized filtration to neutrality, then with washes of absolute alcohol 2 times；
(6) after the completion for the treatment of step (5), gained material is put into heater box, after 500 DEG C of baking 10h, grind, final system
Obtain the activated carbon of specific area.
Described activated carbon is mesoporous material, and specific surface area is 1235.5m2/ g, macropore radius are 29861nm, transitional pore half
Footpath is 8752nm, and pore radius are 63.2nm.
Embodiment 10
(1) municipal sludge acquired in from sewage treatment plant is put into standing 24h in vessel；
(2) after treating that step (1) standing completes, after being dried, pulverize, grinding, under vacuum, with 1000 DEG C
Temperature calcination 10h；
(3), after the completion for the treatment of step (2), the deionized water of certain proportion is added to stir 6h in material obtained by step (2),
Soaked after 10h with dilute sulfuric acid, wash to neutrality；
(4) with the naoh solution of 2mol/l, the ph value of step (3) resulting solution is adjusted to 12 about；
(5) step (4) resulting solution is washed with deionized filtration to neutrality, then with washes of absolute alcohol 5 times；
(6) after the completion for the treatment of step (5), gained material is put into heater box, after 500 DEG C of baking 12h, grind, final system
Obtain the activated carbon of specific area.
Described activated carbon is mesoporous material, and specific surface area is 987.2m2/ g, macropore radius are 22354nm, transition pore radius
For 7895nm, pore radius are 98.6nm.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of method preparing activated carbon using municipal sludge, comprising:
A), after municipal sludge being stood, is dried, pulverizing, grinding, calcine under vacuum；
B) inorganic matters in the material that removal step a) obtains；
C) the ph value of the solution that regulating step b) obtains, to alkalescence, is washed and is used absolute ethanol washing to neutrality；
D) material that step c) obtains is toasted, grinds, obtain activated carbon.
2. method according to claim 1 is it is characterised in that in described step a), and the temperature of described calcining is 200～
1000 DEG C, the time of described calcining is 1～12h.
3. method according to claim 1 is it is characterised in that in described step d), and the temperature of described baking is 100～
500 DEG C, the time of described baking is 1～12h.
4. method according to claim 1 it is characterised in that described step b) particularly as follows:
The material that step a) is obtained soaks 1～10h with dilute sulfuric acid, washs to neutrality.
5. method according to claim 4 it is characterised in that described step b) particularly as follows:
The material that step a) is obtained is mixed with deionized water, then soaks 1～10h with dilute sulfuric acid, washs to neutrality.
6. method according to claim 1 is it is characterised in that in described step c), the solution that regulating step b) obtains
Ph value to 10～12, is washed to neutrality with absolute ethanol washing 1～5 time.
7. method according to claim 1 is it is characterised in that in described step a), and the speed of described grinding is 500～
800r/min；In described step d), the speed of described grinding is 500～800r/min.
8. method according to claim 1 is it is characterised in that in described step a), it is dirty that described municipal sludge is selected from life
Mud and/or industrial sludge.
9. the sludge-based activated carbon that the method described in claim 1 prepares, its specific surface area is 800m2/ more than g.
10. sludge-based activated carbon according to claim 9 is it is characterised in that its specific surface area is 950～2000m2/g.
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| CN201610891377.XA CN106348291A (en) | 2016-10-13 | 2016-10-13 | Method for preparing active carbon by utilizing urban sludge |
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| CN103779111A (en) * | 2014-01-27 | 2014-05-07 | 华南理工大学 | Method for manufacturing electrode materials of super-capacitors by using surplus sludge |
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