CN107159121A - A kind of modified activated carbon and its preparation method and application - Google Patents
A kind of modified activated carbon and its preparation method and application Download PDFInfo
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- CN107159121A CN107159121A CN201710521528.7A CN201710521528A CN107159121A CN 107159121 A CN107159121 A CN 107159121A CN 201710521528 A CN201710521528 A CN 201710521528A CN 107159121 A CN107159121 A CN 107159121A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- 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
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
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- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
- B01J20/28066—Surface area, e.g. B.E.T specific surface area being more than 1000 m2/g
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- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28069—Pore volume, e.g. total pore volume, mesopore volume, micropore volume
- B01J20/28076—Pore volume, e.g. total pore volume, mesopore volume, micropore volume being more than 1.0 ml/g
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- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28078—Pore diameter
- B01J20/28083—Pore diameter being in the range 2-50 nm, i.e. mesopores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/112—Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
- B01D2253/1124—Metal oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7027—Aromatic hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
Abstract
The invention provides a kind of preparation method of modified activated carbon, activated carbon is mixed with single transition element metal salt and water, successively through drying, calcining, modified activated carbon is obtained.The modified activated carbon pore structure that the present invention is prepared is flourishing, and specific surface area is 1384.63m2·g‑1, total pore volume is 1.08cm3·g‑1, average pore size is 2.16nm, has higher absorption property to organic gas, and adsorbance is up to 380mg/g, can be made into variously-shaped activated-carbon filter box, is adapted to different gas phase Protection Products；A kind of transition element metal salt is related only to the modification of activated carbon, modified activated carbon is made in category one-step method, it is to avoid using Determination of multiple metal elements or use multistep processes, operating process is simple, and cost is low；Obtained modified activated carbon is less demanding to adsorption conditionses, and applicable situation is extensive.
Description
Technical field
The present invention relates to environmental contaminants processing technology field, more particularly to a kind of modified activated carbon and preparation method thereof and
Using.
Background technology
Building and ornament materials can in air petrochina chemical industry, fuel combustion and the discharge of vehicle exhaust, indoor environment
Organic gas (benzene, toluene, formaldehyde or acetone etc.) is produced, because of spies such as its is poisonous, inflammable, easily carcinogenic and easy modificator gene mutation
Property, trigger the extensive concern of people in recent years.Air stripping, counter-infiltration absorption, biodegradable, flame combustion and catalysis oxidation etc.
Method can to a certain extent be separated, purify organic gas, but its efficiency and cost are restricted.Active carbon adsorption is because of its ring
Border close friend, sustainable use, cost are low, efficiency high is certified as convenient organic gas processing method.The preparation of activated carbon
Condition, porosity, surface chemical property determines absorption property of the activated carbon to organic gas.
The modifying method of activated carbon more commonly used at present is acid, alkali (nitric acid, phosphoric acid, hydrogen peroxide；Sodium hydroxide, hydrogen-oxygen
Change potassium, ammoniacal liquor) it is modified, by load transitions metal element ion, utilize the complexing between metal ion and organic gas molecule
Effect, can significantly improve absorption property of the activated carbon to organic gas molecule, and such as US 5544626A describe cyanogen in absorption air
Change the preparation method of double Immesion active carbons of hydrogen, successively impregnate the first B metal salt and the second B metal carbonate by metal
Composition is loaded on the activated carbon, improves guard time and absorption property of the activated carbon to hydrogen cyanide；US 8343824B2 are introduced
Dipping Zinc compounds and the activated carbon of molybdenum compound to sour gas such as sulfur dioxide and hydrogen sulfide have preferable suction as adsorbent
Attached property；CN106076113A is described using nanotube confinement active component catalyst as catalyst, and organic gas is degraded into two
Carbonoxide and water.
In summary, prepare at present more than activated carbon using while impregnate the activated carbon of Determination of multiple metal elements, utilize activated carbon
Combination between flourishing pore structure and higher specific surface area and metallic element and organic gas improves the absorption of activated carbon
Performance；Or organic gas catalysis oxidation is carbon dioxide or water on the activated carbon by load by catalyst of precious metal element.Deposit
In complex operation step, cost is higher, the problem of industrialized production difficulty is big.
The content of the invention
In view of this, it is an object of the invention to provide a kind of preparation method of modified activated carbon, agents useful for same is common, system
Preparation Method is simple, easily realizes, cost is low, it is easy to accomplish industrialized production；The modified activated carbon of preparation to organic gas have compared with
High absorption property.
In order to realize foregoing invention purpose, the present invention provides following technical scheme：
A kind of preparation method of modified activated carbon, comprises the following steps：
(1) activated carbon is mixed with single transition element metal salt and water, obtains modified active carbon precursor；
(2) the modified active carbon precursor that the step (1) obtains obtains modified activated carbon successively through drying, calcining.
Preferably, transition element metal salt includes zinc salt, manganese salt, nickel salt, cobalt salt, molybdenum salt or mantoquita in the step (1),
And be nitrate, sulfate, tartrate, acetate or villaumite.
Preferably, in step (1) the modified active carbon precursor mass fraction of transition element metal salt for 0.1%~
12%；
The mass ratio of the activated carbon and transition element metal salt is 1:(0.1~2.4).
Preferably, the temperature of mixing is 15~65 DEG C in the step (1), and the time of the mixing is 4~24 hours.
Preferably, the temperature dried in the step (2) is 70~150 DEG C, and the time of the drying is 12~72 hours.
Preferably, calcining includes the first calcining and the second calcining successively in the step (2)；First calcining is in N2Gas
Carried out in atmosphere, second calcining is in CO2Carried out in atmosphere.
Preferably, the calcining heat of first calcining is 400~900 DEG C, time of first calcining for 0.5~
2h。
Preferably, the calcining heat of second calcining is 400~900 DEG C, time of second calcining for 0.5~
2h。
Present invention also offers modified activated carbon made from the preparation method described in above-mentioned technical proposal, the modified active
Charcoal bag includes activated carbon and is supported on transition in the single transition metal oxide on inside activated carbon and surface, the modified activated carbon
The weight/mass percentage composition of metal oxide is 0.1~10%.
Present invention also offers application of the modified activated carbon described in above-mentioned technical proposal in absorption organic gas.
The invention provides a kind of preparation method of modified activated carbon, activated carbon is mixed with transition element metal salt and water
Close, successively through drying, calcining, obtain modified activated carbon.The present invention is prepared with single transition element metal salt one-step method and is modified
Activated carbon, preparation method is simple, easily realizes, cost is low, it is easy to accomplish industrialized production；The modified activated carbon of preparation is to organic gas
Body has higher absorption property.
It is an advantage of the invention that：
1st, the modified activated carbon obtained is inexpensively pollution-free, less demanding to adsorption conditionses, and applicable situation is extensive, it is to avoid use
Noble metal is as catalyst, and cost is relatively low, and the problem of avoid caused by harsh conditions catalyst inactivation or high energy consumption, and system
Flourishing for the modified activated carbon pore structure gone out, specific surface area is 1384.63m2·g-1, total pore volume is 1.08cm3·g-1, it is average
Aperture is 2.16nm, has higher absorption property to organic gas, and adsorbance is up to 380mg/g, can be made into variously-shaped
Activated-carbon filter box, is adapted to different gas phase Protection Products.
2nd, the modification to activated carbon relates only to a kind of transition element metal salt, and category one-step method is made modified activated carbon, kept away
Exempt from using Determination of multiple metal elements or use multistep processes, operating process is simple, and cost is low.
Embodiment
The invention provides a kind of preparation method of modified activated carbon, comprise the following steps：
(1) activated carbon is mixed with single transition element metal salt and water, obtains modified active carbon precursor；
(2) the modified active carbon precursor that the step (1) obtains obtains modified activated carbon successively through drying, calcining.
The present invention mixes activated carbon with single transition element metal salt and water, obtains modified active carbon precursor.This hair
In bright, the mesh number of the activated carbon is preferably 10~24 mesh, more preferably 15~20 mesh；The iodine number of the activated carbon is preferably
800~1500mg/g, more preferably 1000~1200mg/g, most preferably 1050~1150mg/g.The present invention is to the activity
The source of charcoal is without special restriction, using commercial goods well known to those skilled in the art, preferably biomass active
Charcoal, more preferably cocoanut active charcoal.
In the present invention, the activated carbon is preferably through being pre-processed.In the present invention, the preferred bag of the pretreatment
Include：Wash and dry.
The present invention is preferably washed activated carbon, and the washing can remove the impurity in activated carbon.In the present invention,
Described to wash the detergent preferably water used, the number of times of the washing is preferably 5~15 times, more preferably 8~10 times.
After the completion of washing, preferably the product after the washing is dried by the present invention.In the present invention, the drying can
The detergent residual in activated carbon from activated sludge is removed, is conducive to follow-up transition element metal salt to enter in the hole of activated carbon.
In the present invention, the temperature of the drying is preferably 70~150 DEG C, more preferably 80~120 DEG C, most preferably 90~105 DEG C；Institute
It is preferably 12~72h to state the dry time, more preferably 24~36h, most preferably 25~30h；The dried activated carbon
Middle moisture is preferably 0.5%~25%, more preferably 2~20%, most preferably 10~15%.
In the present invention, the transition element metal salt preferably includes zinc salt, manganese salt, nickel salt, cobalt salt, molybdenum salt or mantoquita,
And be nitrate, sulfate, tartrate, acetate or villaumite, more preferably cobalt acetate, nickel nitrate, zinc chloride or molybdenum trisulfate.
In the present invention, the transition element metal salt can improve adsorption capacity of the activated carbon to organic gas.
In the present invention, the mass fraction of transition element metal salt is preferably 0.1% in the modified active carbon precursor
~12%, more preferably 1~10%, most preferably 4~8%；The mass ratio of the activated carbon and transition element metal salt is preferred
For 1:0.1~1:2.4, more preferably 1:1~1:2.
In the present invention, the temperature of the mixing is preferably 15~65 DEG C, more preferably 25~50 DEG C, most preferably 30~
40℃；The time of the mixing is preferably 4~24 hours, more preferably 8~12h.
The present invention does not have special restriction to the charging sequence of the activated carbon, transition element metal salt and water, using this
Charging sequence known to art personnel.Preferably first transition element metal salt and water are mixed in embodiments of the present invention
Transition element metal salting liquid is obtained, then activated carbon is impregnated into transition element metal salting liquid.The present invention is preferably in dipping
During every 0.1~1h stirring once, the present invention there is no special restriction to the rotating speed of stirring and time, using this area skill
It known to art personnel, can be well mixed raw material.
In the present invention, single transition element metal salt can be supported on the surface of activated carbon by the mixing, formed and be modified
Activated carbon precursor, and then adsorption capacity of the activated carbon to organic gas can be improved.
After the completion of mixing, the product of the mixing is preferably obtained modified active carbon precursor by the present invention through separation of solid and liquid.
The present invention does not have special restriction to the concrete mode of the separation of solid and liquid, is using mode well known to those skilled in the art
Can, it is specific as filtered.
Obtain after modified active carbon precursor, the present invention successively through drying, calcining, obtains the modified active carbon precursor
To modified activated carbon.In the present invention, the temperature of the drying is preferably 70~150 DEG C, more preferably 80~120 DEG C, most preferably
For 90~100 DEG C；The time of the drying is preferably 12~72h, more preferably 24~36h, most preferably 25~30h；It is described
Moisture is preferably 0.5%~25% in desciccate, more preferably 2~20%, most preferably 10~15%.
After the completion of drying, the present invention is calcined to the product of the drying, obtains modified activated carbon.In the present invention, institute
State calcining preferably includes the first calcining and the second calcining successively；First calcining is preferably in N2Carried out in atmosphere, described second
Calcining is preferably in CO2Carried out in atmosphere.In the present invention, the N2And CO2Gas flow independently be preferably 1~10L/
Min, more preferably 2~5L/min.
The present invention is preferably by the temperature of the product heats of the drying to the first calcining, the calcining heat of first calcining
Preferably 400~900 DEG C, most preferably more preferably 500~700 DEG C, 550~600 DEG C；The time of first calcining is preferred
For 0.5~2h, more preferably 1~1.5h.When dried product is heated to the temperature of the first calcining by the present invention by room temperature
The rate of heat addition is preferably 2~15 DEG C/min, more preferably 5~10 DEG C/min.In the present invention, first calcining can be improved
Phosphorus content in activated carbon, the combination of enhancing transition element metal salt and activated carbon surface, and increase activity to a certain extent
The specific surface area and pore volume of mesopore in charcoal.
After the completion of first calcining, the product that the present invention is preferably calcined described first carries out second and calcined.Described second forges
The calcining heat of burning is preferably 400~900 DEG C, more preferably 500~700 DEG C, most preferably 550~600 DEG C；Described second forges
The time of burning is preferably 0.5~2h, more preferably 1~1.5h.In the present invention, second calcining can further increase work
Property charcoal in mesopore specific surface area and pore volume, increase activated carbon surface acidic functionality quantity.
The present invention does not have special restriction to the device used of calcining, using calcining well known to those skilled in the art
Device, is calcined present invention preferably uses the tube furnace with temperature programmed control function.
After the completion of second calcining, the product that the present invention is preferably calcined described second is cooled down, and obtains modified activated carbon.This hair
In bright, the cooling is preferably in N2Carried out in atmosphere, the N2Gas flow be preferably 1~10L/min, more preferably 2~
5L/min.The present invention does not have special restriction to the cooldown rate of the cooling, using cooling well known to those skilled in the art
Mode, the present invention is preferably furnace cooling.
Present invention also offers modified activated carbon made from the preparation method described in above-mentioned technical proposal, the modified active
Charcoal bag includes activated carbon and is supported on transition in the single transition metal oxide on inside activated carbon and surface, the modified activated carbon
The weight/mass percentage composition of metal oxide is preferably 0.1~10%, and more preferably 6~8%.
Present invention also offers application of the modified activated carbon described in above-mentioned technical proposal in absorption organic gas.At this
In invention, the organic gas preferably includes the one or more in benzene,toluene,xylene, formaldehyde and acetone.
Modified activated carbon provided with reference to embodiment the present invention and its preparation method and application is carried out specifically
It is bright, but they can not be interpreted as limiting the scope of the present invention.
Embodiment 1
Weigh with distillation water washing 8 times and 24h is dried in 105 DEG C of baking ovens to the 10 mesh coconut husks work that moisture is 2%
Property charcoal (iodine number is 800mg/g) 100g, is put into beaker, then by solid-liquid ratio 1:8 add the nickel nitrate that mass fraction is 12%
Solution, mixes 12h at 25 DEG C, and is stirred once with glass bar every 1h, afterwards with screen filtration into pallet, at 150 DEG C
12h is dried in baking oven to moisture 0.5%.By dried activated carbon as in the tube furnace with temperature programmed control function,
Since room temperature, with N2For protective atmosphere, gas flow 2L/min is warming up to 500 DEG C of holdings with 5 DEG C/min heating rate
1h, switches atmosphere with CO afterwards2For protective atmosphere, gas flow 2L/min continues to keep 1h, then switches atmosphere with N2To protect
Atmosphere is protected, gas flow 2L/min is cooled to room temperature and modified activated carbon is made.
After testing, the weight/mass percentage composition of transition metal oxide is 10%, the modification prepared in the modified activated carbon
Activated carbon pore structure is flourishing, and specific surface area is 1384.63m2·g-1, total pore volume is 1.08cm3·g-1, average pore size is
2.16nm, the absorption property of the Modified Activated Carbon For Benzene, unit adsorbance reaches 380mg/g.
Embodiment 2
Weigh with distillation water washing 15 times and 24h is dried in 70 DEG C of baking ovens to the 24 mesh coconut husks work that moisture is 25%
Property charcoal (iodine number is 1500mg/g) 2000g, is put into PP Plastic Drums, then by solid-liquid ratio 1:10 addition mass fractions are 1%
Cobalt acetate solution, mixes 24h at 50 DEG C, and is stirred once with glass bar every 0.5h, afterwards with screen filtration into pallet,
24h is dried in 70 DEG C of baking ovens to moisture 2%.By dried activated carbon as the tube furnace with temperature programmed control function
In, since room temperature, with N2For protective atmosphere, gas flow 10L/min is warming up to 900 DEG C of guarantors with 2 DEG C/min heating rate
0.5h is held, switches atmosphere afterwards with CO2For protective atmosphere, gas flow 10L/min continues to keep 2h, then switches atmosphere with N2
For protective atmosphere, gas flow 5L/min is cooled to room temperature and modified activated carbon is made.
After testing, the weight/mass percentage composition of transition metal oxide is 8% in the modified activated carbon, the modified work prepared
Property charcoal pore structure it is flourishing, specific surface area is 1256.73m2·g-1, total pore volume is 1.03cm3·g-1, average pore size is
1.74nm, the modified activated carbon reaches 360mg/g to the absorption property of toluene, unit adsorbance.
The application is using agriculture and forestry organic waste material activated carbon as raw material, environmentally friendly cheap and easy to get, the modified activated carbon prepared
Pore structure is flourishing, and specific surface area is larger, has higher absorption property to organic gas, can be made into variously-shaped activated carbon
Box is filtered, different gas phase Protection Products are adapted to；Modification to activated carbon relates only to a kind of transition element metal salt, belongs to one-step method
Modified activated carbon is made, it is to avoid using Determination of multiple metal elements or use multistep processes, operating process is simple, and cost is low；What is obtained changes
Property activated carbon is inexpensively pollution-free, and less demanding to adsorption conditionses, applicable situation is extensive, it is to avoid use noble metal as catalyst,
Cost is relatively low, and the problem of avoid caused by harsh conditions catalyst inactivation or high energy consumption.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of 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 preparation method of modified activated carbon, comprises the following steps：
(1) activated carbon is mixed with single transition element metal salt and water, obtains modified active carbon precursor；
(2) the modified active carbon precursor that the step (1) obtains obtains modified activated carbon successively through drying, calcining.
2. preparation method according to claim 1, it is characterised in that transition element metal salt includes in the step (1)
Zinc salt, manganese salt, nickel salt, cobalt salt, molybdenum salt or mantoquita, and be nitrate, sulfate, tartrate, acetate or villaumite.
3. preparation method according to claim 1 or 2, it is characterised in that in step (1) the modified active carbon precursor
The mass fraction of transition element metal salt is 0.1%~12%；
The mass ratio of the activated carbon and transition element metal salt is 1:(0.1~2.4).
4. preparation method according to claim 1, it is characterised in that the temperature of mixing is 15~65 in the step (1)
DEG C, the time of the mixing is 4~24 hours.
5. preparation method according to claim 1, it is characterised in that the temperature dried in the step (2) is 70~150
DEG C, the time of the drying is 12~72 hours.
6. preparation method according to claim 1, it is characterised in that calcining is forged including first successively in the step (2)
Burn and the second calcining；First calcining is in N2Carried out in atmosphere, second calcining is in CO2Carried out in atmosphere.
7. preparation method according to claim 6, it is characterised in that the calcining heat of first calcining is 400~900
DEG C, the time of first calcining is 0.5~2h.
8. the preparation method according to claim 6 or 7, it is characterised in that the calcining heat of second calcining for 400~
900 DEG C, the time of second calcining is 0.5~2h.
9. modified activated carbon made from the preparation method described in claim 1~8 any one, it is characterised in that the modification
Activated carbon includes activated carbon and is supported in the single transition metal oxide on inside activated carbon and surface, the modified activated carbon
The weight/mass percentage composition of transition metal oxide is 0.1~10%.
10. application of the modified activated carbon in absorption organic gas described in claim 9.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108940195A (en) * | 2018-06-22 | 2018-12-07 | 马鞍山中粮生物化学有限公司 | A kind of porous carbon adsorbent and preparation method thereof |
| CN109502583A (en) * | 2018-11-29 | 2019-03-22 | 江苏中科纳特环境科技有限公司 | A kind of preparation method of modified activated carbon |
| CN113426449A (en) * | 2021-06-07 | 2021-09-24 | 中南大学 | Preparation and application of high-activation biochar based on thermal and cobalt complex modification |
| CN116272860A (en) * | 2023-01-17 | 2023-06-23 | 徐州绿源鑫邦再生资源科技有限公司 | VOCs treated regenerated activated carbon and preparation method thereof |
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| CN113426449A (en) * | 2021-06-07 | 2021-09-24 | 中南大学 | Preparation and application of high-activation biochar based on thermal and cobalt complex modification |
| CN116272860A (en) * | 2023-01-17 | 2023-06-23 | 徐州绿源鑫邦再生资源科技有限公司 | VOCs treated regenerated activated carbon and preparation method thereof |
| CN116272860B (en) * | 2023-01-17 | 2023-09-12 | 徐州绿源鑫邦再生资源科技有限公司 | VOCs treated regenerated activated carbon and preparation method thereof |
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