CN106976881A - A kind of method of modifying of activated carbon and application - Google Patents
A kind of method of modifying of activated carbon and application Download PDFInfo
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- CN106976881A CN106976881A CN201710282649.0A CN201710282649A CN106976881A CN 106976881 A CN106976881 A CN 106976881A CN 201710282649 A CN201710282649 A CN 201710282649A CN 106976881 A CN106976881 A CN 106976881A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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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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Abstract
The invention discloses a kind of method of modifying of activated carbon and application.The method of modifying of activated carbon comprises the following steps：S1, processing is dried by activated carbon；S2, in atmos low-temperature plasma equipment gas is passed through according to 1cc/min~200cc/min throughput, activated carbon after drying process is sent into the plasma apparatus, activated carbon is set to be at the jet exit of low temperature plasma, the translational speed of jet exit of the plasma apparatus is controlled in 0~30mm/s, handle after 0.5~30min, obtain modified activated carbon.The present invention realizes spark discharge modified activated carbon by physics mode so that activated carbon specific surface area is dramatically increased, and surface functional group is also more rich.Modifying process is easy, efficiency high, and contamination-free is produced.
Description
【Technical field】
The present invention relates to a kind of method of modifying of activated carbon and application.
【Background technology】
With the rapid development of the national economy, people are also faced with environment and asked when enjoying the facility that economic development is brought
Inscribe the baptism brought.
Activated carbon as a kind of conventional sorbing material, with it is with low cost, be widely used and be environment-friendly the features such as,
It is had broad application prospects in terms of air cleaning, sewage disposal and energy storage, and bring great economy
Benefit.
However, general activated carbon has the shortcomings that poor adsorptive selectivity, specific surface area and pore structure are unreasonable, pass through
Surface is modified, and can obtain comparatively ideal pore structure and specific surface area, and then improve adsorption capacity and the absorption selection of activated carbon
Property.Currently conventional method is chemical modification, referring to Publication No. CN105854804A, a kind of entitled modification of activated carbon
The patent application of method.The Properties of Activated Carbon that this method is obtained is improved, but operating process is more complicated, time-consuming many and can produce
Substantial amounts of waste liquor contamination environment.
The disclosure of background above technology contents is only used for inventive concept and the technical scheme that auxiliary understands the present invention, and it is not
The prior art of present patent application is necessarily belonged to, application of the above in present patent application is being shown without tangible proof
In the case of day is disclosed, above-mentioned background technology should not be taken to evaluate the novelty and creativeness of the application.
【The content of the invention】
The technical problems to be solved by the invention are：Above-mentioned the deficiencies in the prior art are made up, a kind of changing for activated carbon is proposed
Property method and application, modification process is easy, efficiency high, and contamination-free is produced.
The technical problem of the present invention is solved by following technical scheme：
A kind of method of modifying of activated carbon, comprises the following steps：S1, processing is dried by activated carbon；S2, in air
Force down in isothermal plasma equipment and to be passed through gas according to 1cc/min~200cc/min throughput, by the work after drying process
Property charcoal send into the plasma apparatus, activated carbon is at the jet exit of low temperature plasma, control the grade from
The translational speed of the jet exit of daughter equipment obtains modified activated carbon after 0~30mm/s, 0.5~30min of processing.
The technical problem of the present invention is solved by technical scheme further below：
A kind of basis method of modifying as described above is modified obtained activated carbon.
A kind of activated carbon is used for the method for adsorption particle, comprises the following steps：It is modified according to method of modifying as described above
Activated carbon, by modified activated carbon application in the process of adsorption particle.
The beneficial effect that the present invention is compared with the prior art is：
The method of modifying of the activated carbon of the present invention, first dries Pre-Treatment of Activated charcoal, recycles atmos low-temperature plasma
Jet, carries out jet injection, activated carbon has certain electric conductivity, so that in activated carbon surface to pretreated activated carbon
Spark over modification.By this physics mode realize spark discharge be modified, consume energy it is low, easy to operate, to experiment condition
It is required that it is low, it can complete at normal temperatures and pressures；Treatment effeciency is high, can complete to be modified within a short period of time, and performance boost compared with
Greatly；Non-pollutant discharge, beneficial to sustainable development.The activated carbon modified process cost is low, efficiency high, environmental protection.This hair
The activated carbon surface porosity that bright provided method of modifying is obtained increases, and specific surface area is dramatically increased, and surface functional group
It is more rich.The activated carbon product obtained when in use, can improve adsorption efficiency, reduce cost, save space.
【Brief description of the drawings】
Fig. 1 be the specific embodiment of the invention embodiment 4 in before modified after activated carbon hole surface hole comparison diagram.
【Embodiment】
With reference to embodiment and compare accompanying drawing the present invention is described in further details.
Idea of the invention is that：The improvement of chemical modification is not considered further that, but seeks solution route from physics mode.Deng
Gas ions are made up of, low-temperature plasma as the 4th class state of matter substantial amounts of cation, anion, electronics, free radical etc.
Body belongs to a class of plasma, due to its electron temperature be significantly larger than background ambient temperature and low energy consumption, without it is discarded, without dirt
The advantages of dye and capacity usage ratio are high, is widely applied in each field.In the present invention, the conduction of binding activity carbon surface
Property, jet spray application is modified in the surface of activated carbon, spark discharge is formed, to optimize the surface texture of absorbent charcoal material
And performance, larger play the adsorption capacity of activated carbon.
Present embodiment provides a kind of method of modifying of activated carbon, comprises the following steps：
S1, processing is dried by activated carbon.The step is drying process, moisture to remove activated carbon surface etc., is
It is accurate that follow-up plasma irradiating processing is carried out.
When drying, it can be put into drying box.It is preferred that, the temperature of drying box is 60 DEG C~100 DEG C, drying time be 16h~
24h, so as to which processing is efficiently dried.
S2, gas is passed through in atmos low-temperature plasma equipment according to 1cc/min~200cc/min throughput,
By in the activated carbon feeding atmos low-temperature plasma equipment after drying process, activated carbon is set to be in low temperature plasma
At jet exit, the translational speed of jet exit of the plasma apparatus is controlled in 0~30mm/s, processing 0.5~
After 30min, modified activated carbon is obtained.
In the step, gas is passed through according to 1cc/min~200cc/min throughput in a device, the gas being passed through can
For one or more kinds of mixing in air, oxygen, nitrogen, ammonia.Control the translational speed of jet exit 0~
30mm/s, jet exit is opened, not closed state, and low-temperature plasma jet is ejected from jet exit, and jet is arrived
Up to after activated carbon surface, activated carbon surface has certain electric conductivity, when jet action is in activated carbon surface generation spark discharge
During phenomenon, the hole number of activated carbon surface can be increased, its specific surface area is lifted.
The gas being passed through can also generate free radical in the jet when for forming jet air-flow.The free radical of generation by
Source of the gas is determined.If for example, being passed through oxygen, producing oxonium ion free radical；If being passed through nitrogen, Nitrogen ion is produced free
Base.These free radical activities are big, with extremely strong oxidability, so as to be also easy in modified hole number in activated carbon surface
Access corresponding free radical functional group.So, activated carbon surface can be enriched while the porosity increase of activated carbon surface
Functional group, increase substantially its activity.
Preferably, activated carbon is placed in the range of 5~150mm of the jet jet exit.Within the range,
The abundant of the lifting of preferable specific surface area and functional group can be obtained simultaneously.
Preferably, when carrying out surface modification to activated carbon, formula is apart from being handled in two stages.Specifically, first by activated carbon
It is placed in after the scope that distance low-temperature plasma jet exports 5~30mm, 2~10min of processing, then activated carbon is placed in distance
100~250mm of low temperature plasma jet exit scope, handles 2~5min.Found in modifying process, when distance injection
Outlet is short, and high energy electron can hinder access functional group more and in the presence of Spark Discharges.Therefore, two-part distance is passed through
Handled, be first placed in a nearer distance range, the main flashing electric discharge phenomena of this stage activated carbon surface so that
Activated carbon surface forms a large amount of holes；It is subsequently placed in the range of a larger distance, Spark Discharges disappear in the range of,
So as to conveniently accessible substantial amounts of corresponding functional group.
It is further preferred that when being handled according to two-part distance, activated carbon first is placed in into distance low-temperature plasma
10~20mm of jet jet exit scope, after 2~5min of processing, then activated carbon is placed in distance low-temperature plasma
150~200mm of jet jet exit scope, handles 2~4min.According to checking, when being handled under different distance, it can influence
The abundant degree of the functional group finally accessed.When set respectively according to above range the nearer distance of first paragraph and second segment compared with
It is remote apart from when, the quantity of the functional group of access is obviously improved effect.
Preferably, it is oxygen when being passed through gas.Oxonium ion free radical has extremely strong oxidability, but apart from short, it is high
Energy electronics is more to hinder access functional group with Spark Discharges, be not enough to access substantial amounts of oxygen-containing functional group.Now coordinate
During the control of two-part distance, nearby region flashing electric discharge, and in one section of region oxygen be converted into ozone (
During apart from jet jet exit 20mm, concentration reaches maximum).Subsequently in order in the substantial amounts of oxygen-containing function of distant location access
Group.
During injection tip jetting stream, preferably translational speed 5~20mm/s scope so that the scope of translational speed compared with
Properly, the surface of activated carbon can be fully strafed, while modified effect is also preferable.
In addition, before activated carbon is put into equipment, including the step of pretrigger equipment.First plasma apparatus is opened
Open, stand after 20~90s, close；Then the activated carbon is re-fed into, the plasma apparatus is then turned on and is operated.It is logical
First pretrigger equipment is crossed, the pollution on part in equipment, such as electrode is can remove, so that the modified effect of consequent activities charcoal
Fruit is more preferably.
The modifying method of activated carbon of present embodiment, passes through atmos low-temperature plasma jet and activated carbon surface
Electric conductivity be combined, coordinate certain throughput, translational speed and the control of processing time, spark carried out to activated carbon surface
Electric discharge is modified.Realize that spark discharge is modified by this physics mode, consume energy low, easy to operate, low to experiment condition requirement,
It can complete at normal temperatures and pressures；Treatment effeciency is high, can complete to be modified within a short period of time, and performance boost is larger；It is pollution-free
Thing is discharged, beneficial to sustainable development.The activated carbon modified process cost is low, efficiency high, environmental protection.Method of modifying is obtained
Activated carbon surface porosity increase, specific surface area is dramatically increased, surface functional group also relatively enrich.The activated carbon production obtained
When in use, less consumption just can reach performance requirement to product, cost-effective, save space.Can be widely used for air cleaning,
Granular absorption process in terms of sewage disposal and energy storage.
It is as follows, the performance parameter of activated carbon modified in present embodiment is verified by specific embodiment.
Embodiment 1
A kind of method of modifying of activated carbon of the present embodiment, comprises the following steps：
(1) 4g cocoanut active charcoals are placed in baking oven, oven temperature is 60 DEG C, after baking 24h, take out, use electronic balance
2g is weighed, (being designated as AC-1) is modified as the later stage, remaining loading hermetic bag, as a comparison sample (being designated as AC-2).
(2) using air as source of the gas, flow velocity is 20cc/min；Keep the work electricity of atmos low-temperature plasma equipment
Press as 220V, after turning on the power, allow equipment to stand 40s, close power supply.
(3) AC-1 activated carbons are taken, is fitted into 50ml beakers, allows it to be uniformly laid on beaker bottom, be placed in atmos low-temperature
The underface of the jet exit of plasma apparatus.
(4) height of adjusting device, the distance for making low temperature plasma jet exit to activated carbon surface is 10mm, is beaten
The power supply of atmos low-temperature plasma equipment is opened, the translational speed for making jet exit is 10mm/s, is handled after 5min, is closed
Power supply；Change low temperature plasma jet exit again to the distance of activated carbon surface, be 100mm, handle 3min, close electricity
Source；Modified activated carbon is loaded hermetic bag, with to be tested.Table 1 be in the present embodiment for measuring before modified after activated carbon
The data of specific surface area, O/C atomic ratios.
Table 1
| Title | AC-2 | AC-1 |
| Specific surface area | 915.6m2/g | 999.9m2/g |
| n(O)/n(C) | 7.88% | 8.09% |
The cocoanut active charcoal hole that the present embodiment is modified increases, and specific surface area increase, oxygen-containing functional group increased, because
And adsorption capacity is improved.
Embodiment 2
A kind of method of modifying of activated carbon of the present embodiment, comprises the following steps：
(1) 4g cocoanut active charcoals are placed in baking oven, after 60 DEG C of constant temperature baking 24h, take out, 2g is weighed with electronic balance,
(being used as later stage modification) (being labeled as No. AC-3), remaining loading hermetic bag, (sample as a comparison) (is labeled as No. AC-4).
(2) using air as source of the gas, flow velocity is 20cc/min；Keep the work electricity of atmos low-temperature plasma equipment
Press as 220V, after turning on the power, allow equipment to stand 40s, close power supply.
(3) AC-3 activated carbons are taken, is fitted into 50ml beakers, allows it to be uniformly laid on beaker bottom, be placed in atmos low-temperature
Immediately below the jet exit of plasma apparatus.
(4) height of adjusting device, the distance for making low temperature plasma jet exit to activated carbon surface is 10mm, is beaten
The power supply of atmos low-temperature plasma equipment is opened, the translational speed for making jet exit is 20mm/s, is handled after 5min, is closed
Power supply；Change low temperature plasma jet exit again to the distance of activated carbon surface, be 200mm, handle 5min, close electricity
Source；Modified activated carbon is loaded hermetic bag, with to be tested.Table 2 be in the present embodiment for measuring before modified after activated carbon
The data of specific surface area, O/C atomic ratios.
Table 2
The cocoanut active charcoal hole that the present embodiment is modified increases, and specific surface area increase, oxygen-containing functional group increased, because
And adsorption capacity is improved.
Embodiment 3
A kind of method of modifying of activated carbon of the present embodiment, comprises the following steps：
(1) 4g cocoanut active charcoals are placed in baking oven, oven temperature is 60 DEG C, after baking 24h, take out, use electronic balance
2g is weighed, is modified (labeled as No. AC-5) as the later stage, remaining loading hermetic bag, as a comparison sample (being labeled as No. AC-6).
(2) using oxygen as source of the gas, flow velocity is 30cc/min；Keep the work electricity of atmos low-temperature plasma equipment
Press as 220V, after turning on the power, allow equipment to stand 40s, close power supply.
(3) AC-5 activated carbons are taken, is fitted into 50ml beakers, allows it to be uniformly laid on beaker bottom, be placed in atmos low-temperature
The underface of plasma apparatus.
(4) height of adjusting device, the distance for making low temperature plasma jet exit to activated carbon surface is 10mm, is beaten
The power supply of atmos low-temperature plasma equipment is opened, the translational speed for making jet exit is 10mm/s, is handled after 10min, is closed
Power supply；Change low temperature plasma jet exit again to the distance of activated carbon surface, be 100mm, handle 3min, close electricity
Source；Modified activated carbon is loaded hermetic bag, with to be tested.Table 3 be in the present embodiment for measuring before modified after activated carbon
The data of specific surface area, O/C atomic ratios.
Table 3
| Title | AC-6 | AC-5 |
| Specific surface area | 9122.3m2/g | 1010.7m2/g |
| n(O)/n(C) | 7.88% | 9.83% |
The cocoanut active charcoal hole number that the present embodiment is modified increases, and specific surface area increase, oxygen-containing functional group increased,
Thus adsorption capacity is improved.
Embodiment 4
A kind of method of modifying of activated carbon of the present embodiment, comprises the following steps：
(1) 4g cocoanut active charcoals are placed in baking oven, oven temperature is 80 DEG C, after baking 18h, take out, use electronic balance
2g is weighed, is modified (labeled as No. AC-7) as the later stage, remaining loading hermetic bag, as a comparison sample (being labeled as No. AC-8).
(2) using oxygen as source of the gas, flow velocity is 30cc/min；Keep the work electricity of atmos low-temperature plasma equipment
Press as 220V, after turning on the power, allow equipment to stand 40s, close power supply.
(3) AC-8 activated carbons are taken, is fitted into 50ml beakers, allows it to be uniformly laid on beaker bottom, be placed in atmos low-temperature
The underface of plasma apparatus.
(4) height of adjusting device, the distance for making low temperature plasma jet exit to activated carbon surface is 10mm, is beaten
The power supply of atmos low-temperature plasma equipment is opened, the translational speed for making jet exit is 10mm/s, is handled after 5min, is closed
Power supply；Change low temperature plasma jet exit again to the distance of activated carbon surface, be 200mm, handle 5min, close electricity
Source；Modified activated carbon is loaded hermetic bag, with to be tested.Table 4 be in the present embodiment for measuring before modified after activated carbon
The data of specific surface area, O/C atomic ratios.
Table 4
| Title | AC-8 | AC-7 |
| Specific surface area | 918.5m2/g | 1027.4m2/g |
| n(O)/n(C) | 7.88% | 12.39% |
The effect contrast figure that the cocoanut active charcoal hole that the present embodiment is modified increases is as shown in Figure 1.What the present embodiment was modified
Cocoanut active charcoal hole number increases, specific surface area increase, and oxygen-containing functional group increased, thus adsorption capacity improved.
Activated carbon after test before modified is used for the situation for adsorbing methylene blue.(AC-8 activated carbons) absorption is sub- before modified
The adsorptive value of methyl blue is 458mg/g, and the adsorptive value of modified (AC-7 activated carbons) absorption methylene blue is 530mg/g, absorption
Ability, which has, to be obviously improved.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
Some replacements or substantially modification are made on the premise of not departing from present inventive concept, and performance or purposes are identical, should all be considered as
Belong to protection scope of the present invention.
Claims (10)
1. a kind of method of modifying of activated carbon, it is characterised in that：Comprise the following steps：S1, processing is dried by activated carbon；
S2, gas is passed through in atmos low-temperature plasma equipment according to 1cc/min~200cc/min throughput, at drying
Activated carbon after reason is sent into the plasma apparatus, activated carbon is at the jet exit of low temperature plasma, control
The translational speed of the jet exit of the plasma apparatus obtains modified after 0~30mm/s, 0.5~30min of processing
Activated carbon.
2. the method for modifying of activated carbon according to claim 1, it is characterised in that：The gas is air, oxygen, nitrogen
One or more kinds of mixing in gas, ammonia.
3. the method for modifying of activated carbon according to claim 1, it is characterised in that：In step S2, the activated carbon is put
In in the range of the 5~150mm of jet exit.
4. the method for modifying of activated carbon according to claim 1, it is characterised in that：Step S2 includes：First by the work
Property charcoal be placed in distance low-temperature plasma 5~30mm of jet exit scope, after 2~10min of processing, then by the activated carbon
100~250mm of jet exit of distance low-temperature plasma scope is placed in, 2~5min is handled.
5. the method for modifying of activated carbon according to claim 4, it is characterised in that：Step S2 includes：First by the work
Property charcoal be placed in distance low-temperature plasma 10~20mm of jet exit scope, after 2~5min of processing, then by the activated carbon
150~200mm of jet exit of distance low-temperature plasma scope is placed in, 2~4min is handled.
6. the method for modifying of activated carbon according to claim 1, it is characterised in that：In step S2, the plasma is controlled
The translational speed of the jet exit of body equipment is in 5~20mm/s.
7. the method for modifying of activated carbon according to claim 1, it is characterised in that：Step S2 includes：First will be described etc.
Gas ions opening of device, stands after 20~90s, closes；The activated carbon is then fed into, the plasma apparatus is then turned on and enters
Row work.
8. the method for modifying of activated carbon according to claim 1, it is characterised in that：In step S1, the activated carbon is put
It is dried in drying box, the temperature of the drying box is 60 DEG C~100 DEG C, and drying time is 16h~24h.
9. a kind of method of modifying according to any one of claim 1~8 is modified obtained activated carbon.
10. a kind of activated carbon is used for the method for adsorption particle, it is characterised in that：Comprise the following steps：According to claim 1~8
Method of modifying modified activated carbon described in any one, by modified activated carbon application in the process of adsorption particle.
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| CN109206284A (en) * | 2018-09-27 | 2019-01-15 | 西南科技大学 | The method for preparing super-hydrophobic oxidant based on lotus leaf effect |
| CN109134170B (en) * | 2018-09-27 | 2021-02-09 | 西南科技大学 | Method for preparing super-hydrophobic spherical ammonium dinitramide based on interfacial tension |
| CN109206284B (en) * | 2018-09-27 | 2021-03-09 | 西南科技大学 | Method for preparing super-hydrophobic oxidant based on lotus leaf effect |
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| CN106976881B (en) | 2019-05-17 |
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