CN106185927A - The preparation method of the wood activated charcoal containing cerium - Google Patents
The preparation method of the wood activated charcoal containing cerium Download PDFInfo
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- CN106185927A CN106185927A CN201610558657.9A CN201610558657A CN106185927A CN 106185927 A CN106185927 A CN 106185927A CN 201610558657 A CN201610558657 A CN 201610558657A CN 106185927 A CN106185927 A CN 106185927A
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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
- C01P2004/60—Particles characterised by their size
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
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Abstract
The invention discloses the preparation method of a kind of wood activated charcoal containing cerium.The method of the present invention comprises the steps: that cerium compound, alkaline earth metal compound are mixed homogeneously by (1) with vegetable material powder, obtains mixture；(2) this mixture is carried out at 380～580 DEG C carbonization, to obtain the first carbonized product；(3) the first carbonized product is carried out at 620～780 DEG C carbonization, be then cooled to room temperature, to obtain the second carbonized product；(4) the second carbonized product is ground to carbon dust, it is mixed with alkali metal compound, then 350～800 DEG C of activation, to obtain activation products；(5) activation products are obtained wood activated charcoal through process.Cerium-containing compound is directly mixed with vegetable material powder and manufactures rare earth wood activated charcoal by the method for the present invention, thus improves the stability of rare earth wood activated charcoal complex.
Description
Technical field
The present invention relates to the preparation method of a kind of wood activated charcoal containing cerium, be particularly useful for filter tap water containing cerium
The preparation method of wood activated charcoal.
Background technology
Along with raising and the appearance of water environment pollution of people's living standard, people propose higher wanting for water quality
Ask.Activated carbon, as a kind of filtering material, has been widely used in water treatment technology.Activated carbon is a kind of porous material, tool
There is huge specific surface area, thus the impurity such as the float in water can be adsorbed；But suction organic for some in water
Attached ability is the most weak.
In activated carbon, introduce rare earth element, organic ability in its degradation water can be improved.At present, occurred in that
Activated carbon for the supported rare earth of water treatment technology.Such as, CN105214641A discloses the preparation side of a kind of RE composite
Method: the compound choosing Ce, Zr, La, Pr, Nd, Yb etc. is presoma, prepares ternary, quaternary and polynary rare earth compound respectively
Thing；Powdery porous activated carbon is placed in corresponding precursor solution, then stirs, after absorption certain time, add precipitant again
Mixture is precipitated, regulates proper pH value, after precipitation is complete, ageing, refilter washing, at high temperature calcine after drying.
And for example, CN105645558A discloses the CWO processing method of a kind of industrial circulating water, wherein uses
Catalyst include carrier and active metal component, wherein with transition metal and rare earth metal as active metal component, carrier is
With the activated carbon of 150 mesh～300 mesh as core, with amorphous silica-alumina as shell.This catalyst is prepared as follows: amorphous
During sial plastic, introducing the serosity that the activated carbon making beating of 150～300 mesh is formed, the material after the plastic obtained is carried out always
Change, filter, wash, be dried, make catalyst carrier, on a catalyst support impregnating metal component, be then dried, at indifferent gas
The lower roasting of body protection, obtains catalytic wet oxidation catalyst.
For another example, CN104496011B discloses the preparation method of a kind of rare earth-wood activated charcoal bio-catalytical oxidation mud:
Take the waste residue of alloy containing mixed rare earth oxide 5wt%～10wt% during rare earth ore produces, by described waste residue and concentrations by weight
Be 10%～60% hydrochloric acid according to weight ratio 1: 1～4 mix, be sufficiently stirred for activating 6～12 hours, staticly settle, solid-liquid divides
From, described solid is mixed rare-earth oxide；Take activated sludge, add wood activated charcoal powder and mischmetal oxidation
Thing, stirs 2.5～3.5h, stops stirring 1.5～2.5h, and when stopping stirring, active carbon powder and mixed rare-earth oxide are floating
At the water surface, repeat stirring and stop the step of stirring, after 2～7 days, when stopping stirring, active carbon powder and mischmetal
Oxide no longer floats, and removes water layer above, obtains rare earth-wood activated charcoal bio-catalytical oxidation mud.
Said method is all to mix or the compound containing rare earth element by the change containing rare earth element with active carbon finished products
Compound impregnated in active carbon finished products, thus rare earth element is not strong with the adhesive force of activated carbon, causes rare earth element easily from work
Property charcoal oozes out, thus its stability is the highest.
Summary of the invention
In order to overcome drawbacks described above, present inventor conducts in-depth research, find by the compound containing cerium with plant
Thing material powder directly mixes to manufacture cerium-wood activated charcoal can improve the stability of cerium-wood activated charcoal complex, thus
Complete the present invention.
It is an object of the invention to provide the preparation method of a kind of cerium-wood activated charcoal, its technique is simple, it is possible to obtain steady
Qualitative high cerium-wood activated charcoal complex.Further object is that the cerium-wooden work providing said method to prepare
Property Carbon composites, rare earth element therein is not easy to ooze out from wood activated charcoal.The following technical scheme of the present invention can be real
Existing above-mentioned purpose.
The present invention provides the preparation method of a kind of wood activated charcoal containing cerium, comprises the steps:
(1) cerium compound, alkaline earth metal compound are mixed homogeneously with vegetable material powder, obtain mixture；
(2) this mixture is carried out at 380～580 DEG C carbonization, to obtain the first carbonized product；
(3) the first carbonized product is carried out at 620～780 DEG C carbonization, be then cooled to room temperature, to obtain the second carbonization
Product；
(4) the second carbonized product is ground to carbon dust, it is mixed with alkali metal compound, then 350～800 DEG C of work
Change, to obtain activation products；
(5) activation products are obtained wood activated charcoal through process.
Preparation in accordance with the present invention, it is preferable that in step (1), cerium compound, alkaline earth metal compound and plant
The weight ratio of material powder is 0.1～3:2～10:100.
Preparation in accordance with the present invention, it is preferable that in step (1), described cerium compound is ammonium ceric nitrate, nitric acid
Cerium, cerous sulfate, cerous sulfate, cerous carbonate, cerium oxide, cerous acetate or Sedemesis..
Preparation in accordance with the present invention, it is preferable that in step (1), described alkaline earth metal compound is selected from alkaline earth
The oxide of metal, hydroxide, chloride, bromide, iodide, fluoride, phosphate, carbonate, sulfide, sulfate
Or nitrate.
Preparation in accordance with the present invention, it is preferable that in step (1), the mean diameter of described vegetable material powder
Be 5～500 mesh, described vegetable material powder selected from wood flour, bamboo powder, coconut husk powder, walnut shell powder, boll hull powder,
Palm shell powder, bagasse powder or pit powder.
Preparation in accordance with the present invention, it is preferable that in step (4), described alkali metal compound is selected from hydroxide
Sodium or potassium hydroxide；The consumption of described alkali metal compound is 2～5 times of carbon dust weight.
Preparation in accordance with the present invention, it is preferable that in step (1), by cerium compound, alkaline earth metal compound and plant
Thing material powder mix homogeneously, obtains mixture；In step (2), by this mixture with 6～20 DEG C/h be warming up to 380～
580 DEG C, insulation obtained the first carbonized product after 5～20 hours at such a temperature；In step (3), by the first described carbonization
Product is warming up to 620～780 DEG C with 30～80 DEG C/h, is incubated 0.5～3 hour, then naturally cools to room temperature, obtains
Two carbonized products.
Preparation in accordance with the present invention, it is preferable that in step (4), is ground to put down by the second described carbonized product
All particle diameters are the carbon dust of 20～500 microns, are mixed homogeneously with alkali metal compound by this carbon dust, and load in container；By this appearance
Device heats in activation furnace, is warming up to 350～550 DEG C with the rate of heat addition of 3～10 DEG C/min, at such a temperature keep 30～
100 minutes, heat 10～60 minutes at 750～850 DEG C, then under the protection of protective gas, be cooled to room temperature, lived
Change product.
Preparation in accordance with the present invention, it is preferable that in step (5), described process is: described activation products used
The hydrochloric acid of 0.6～3mol/L neutralizes, then with 0.06～0.3mol/L salt acid elution, be washed with water and wash；Described washing is produced
Thing hot-air fluidized drying, obtains wood activated charcoal after sieving.
The present invention also provides for a kind of activated carbon obtained by above-mentioned preparation method, the mean diameter of described wood activated charcoal
Being 20～500 microns, specific surface area is 500～2800m2/ g, and containing the cerium of 0.1～1.0wt%.
Cerium-containing compound is directly mixed with the raw material manufacturing wood activated charcoal that to manufacture cerium-wood activated charcoal multiple by the present invention
Compound, is so just placed in rare earth element in the agent structure of wood activated charcoal in the forming process of wood activated charcoal.With biography
The preparation technology of system compares, the method for the present invention so that rare earth element is the most firm with the combination of wood activated charcoal, thus
Improve the stability of cerium-wood activated charcoal complex.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to
This.
<preparation method of wood activated charcoal>
The preparation method of the wood activated charcoal containing cerium of the present invention includes multiple step: (1) blend step；(2) first carbon
Change step；(3) second carburising steps；(4) activation step；(5) post-processing step.
The step (1) of the present invention is blend step: cerium compound, alkaline earth metal compound are mixed with vegetable material powder
Uniformly, mixture is obtained.The vegetable material powder of the present invention is selected from wood flour, bamboo powder, coconut husk powder, walnut shell powder, cotton
Shell powder, palm shell powder, bagasse powder or pit powder；It is preferably bamboo powder, coconut husk powder or walnut shell powder；More
It is preferably coconut husk powder or walnut shell powder.The mean diameter of the vegetable material powder of the present invention can be 5～500 mesh；Preferably
It is 50～300 mesh.The mode of mixing is not particularly limited, as long as they uniformly mix.Such as, by cerium compound powder
End, alkaline earth metal compound powder add in vegetable material powder, and then stirring obtains mixture.Alr mode is the most especially
Limit, it is possible to use Henschel mixer, V-Mixer etc..According to a specific embodiment of the present invention, by cerium chemical combination
Thing, alkaline earth metal compound are mixed homogeneously under the inert gas shielding such as nitrogen, argon with vegetable material powder, are mixed
Thing.
In above-mentioned steps, the weight ratio of cerium compound, alkaline earth metal compound and vegetable material powder can be 0.1～
3:2～10:100；It is to say, in terms of 100 weight portion vegetable material powder, cerium compound is 0.1～3 weight portions, alkaline earth gold
Belonging to compound is 2～10 weight portions.As preferably, the weight ratio of cerium compound, alkaline earth metal compound and vegetable material powder
Can be 0.2～2:2～10:100；As it is further preferred that the weight of cerium compound, alkaline earth metal compound and vegetable material powder
Ratio can be 0.3～1:2～10:100.When the content of alkaline earth metal compound is the lowest, it is not enough to play urging of activation step
Change effect, when the content of alkaline earth metal compound is the highest, is unfavorable for rare earth element stable existence in wood activated charcoal.
In above-mentioned steps, described cerium compound can be ammonium ceric nitrate, cerous nitrate, cerous sulfate, cerous sulfate, carbonic acid
Cerium, cerium oxide, cerous acetate or Sedemesis.；It is preferably cerous sulfate, cerous carbonate or cerium oxide.The alkaline earth metal compound of the present invention can
With selected from the oxide of alkaline-earth metal, hydroxide, chloride, bromide, iodide, fluoride, phosphate, carbonate, sulfur
Compound, sulfate or nitrate.Preferably, the alkaline earth metal compound of the present invention can be selected from the oxide of alkaline-earth metal, hydrogen
Oxide, carbonate or nitrate；It is highly preferred that it is carbonate.The alkali earth metal of the present invention is unit of periodic chart the 2nd race
Element, such as Be, Mg, Ca, Sr, Ba and Ra；It is preferably Mg and Ca.The instantiation of the alkaline earth metal compound of the present invention include but
It is not limited to calcium carbonate, calcium oxide, titanium dioxide, magnesium oxide, magnesium carbonate etc..These alkaline earth metal compounds can be used alone,
Or two or more it is used in combination.
The step (2) of the present invention is the first carburising step: this mixture carries out at 380～580 DEG C carbonization, to obtain
First carbonized product.According to a specific embodiment of the present invention, this mixture is heated up with the first of 6～20 DEG C/h
Ramp is to the first carburizing temperature 380～580 DEG C, and insulation obtains after (the first temperature retention time) for 5～20 hours at such a temperature
First carbonized product.This mixture can begin to warm up from room temperature.First heating rate is preferably 8～15 DEG C/h, more preferably
It it is 10～12 DEG C/h.First carburizing temperature is preferably 450～560 DEG C, preferably 500～550 DEG C.First temperature retention time is excellent
Elect 8～15 hours as, preferably 10～12 hours.
The step (3) of the present invention is the second carburising step: the first carbonized product carries out at 620～780 DEG C carbonization, so
After be cooled to room temperature, to obtain the second carbonized product.According to a specific embodiment of the present invention, by the first described carbonization
Product is warming up to the second carburizing temperature 620～780 DEG C with second heating rate of 30～80 DEG C/h, is incubated 0.5～3 hour
(the second temperature retention time), then naturally cools to room temperature, obtains the second carbonized product.First carbonized product can be from the first carbonization
Temperature starts to warm up.Second heating rate is preferably 35～70 DEG C/h, more preferably 50～60 DEG C/h.Second carbonization temperature
Degree is preferably 680～760 DEG C, preferably 700～750 DEG C.Second temperature retention time is preferably 0.8～2 hour, preferably 1～1.5
Hour.
In the step (2)～(3) of the present invention, by vegetable material powder carbonization, thus cause pyrolytic reaction.The present invention's
Carburising step determines the structure of wood activated charcoal, and ensures rare earth element stable existence in wood activated charcoal.First carbon
Change temperature between 380～580 DEG C, it is ensured that the pyrolytic reaction in vegetable material powder is abundant.Second carburizing temperature is 620
～780 DEG C, it is ensured that the carbonization of vegetable material powder is abundant.First heating rate, the second heating rate are controlled at this
Bright scope, can improve rare earth element stability in wood activated charcoal further so that rare earth element and wooden activity
Charcoal combines the tightst.By the wood activated charcoal natural cooling (Slow cooling) after carbonization, the strong of wood activated charcoal can be improved
Degree, and rare earth element is tightly combined with wood activated charcoal.
The step (4) of the present invention is activation step: the second carbonized product is ground to carbon dust, by itself and alkali metal compound
Mixing, then activates, to obtain activation products under the activation temperature of 350～800 DEG C.One according to the present invention is embodied as
Mode, is ground to, by the second described carbonized product, the carbon dust that mean diameter is 20～500 microns, by this carbon dust and alkali metal
Compound mix homogeneously, and load in container；This container is heated in activation furnace, heats up with the rates of heat addition of 3～10 DEG C/min
To 350～550 DEG C, keep 30～100 minutes at such a temperature, heat at 750～850 DEG C 10～60 minutes, then protecting
Protect and be cooled to room temperature under the protection of gas, obtain activation products.It is micro-that the mean diameter of the carbon dust after grinding is preferably 30～350
Rice, more preferably 50～300 microns.The lapping mode of the present invention is not particularly limited, such as, can use jet mill, vibromill
Deng conventional milling apparatus.Carbon dust is ground to above-mentioned particle size range, can avoid the stripping of rare earth element and wood activated charcoal, prolong
Long wood activated charcoal is as the use cycle of adsorbent.
In the step (4) of the present invention, described alkali metal compound can be selected from sodium hydroxide or potassium hydroxide；Preferably
For potassium hydroxide.The consumption of described alkali metal compound can be 2～5 times of carbon dust weight, preferably 2～3 times.Aforementioned carbon
The carbon dust changing step acquisition activates in the presence of alkali metal compound, such as, with alkali metal compound, carbon dust is formed mixture,
Then fill this blend in nickel container and heat.The activation furnace that heating uses is not particularly limited, it is possible to use this
Field known those.
In the step (4) of the present invention, activation temperature can be 350～800 DEG C, preferably 400～750 DEG C.The present invention's
Activation process can be carried out in the inert atmosphere such as nitrogen, argon.Furthermore it is possible to introduce carbon dioxide etc..To fill carbon dust with
The container of alkali metal compound is warming up to the rate of heat addition of 3～10 DEG C/min, preferably 5～8 DEG C/min in activation furnace
350～550 DEG C, preferably 400～500 DEG C, keep 30～100 minutes, preferably 50～80 minutes, at such a temperature 750～850
DEG C, heat 10～60 minutes, preferably 20～30 minutes at preferably 750～800 DEG C, then at the protective gas such as nitrogen, argon
It is cooled to room temperature under protection, obtains activation products.
In activation process, alkali metal compound reacts with the material in carbon dust, and the gas of formation is so that carbon
Powder foams, and the alkali metal of formation then enters in carbon-coating, thus forms a lot of gap.
The step (5) of the present invention is post-processing step: through process, activation products are obtained wood activated charcoal.According to this
A bright detailed description of the invention, described process is: described activation products neutralized, then with the hydrochloric acid of 0.6～3mol/L
With the salt acid elution of 0.06～0.3mol/L, it is washed with water and washs；By described washed product hot-air fluidized drying, and sieve and obtain
Wood activated charcoal.As preferably, salt acid elution and water washing are all carried out under boiling conditions.
In the step (5) of the present invention, use hydrochloric acid to be neutralized and wash, detersive efficiency, and hydrochloric acid can be improved
Easily remove.The concentration of neutralization hydrochloric acid can be 0.6～3mol/L, preferably 0.8～2.5mol/L, more preferably 1.0～
2mol/L.The concentration of washing hydrochloric acid can be 0.06～0.3mol/L, preferably 0.08～0.25mol/L, more preferably 0.1
～0.2mol/L.The hydrochloric acid of suitable concn is possible to prevent rare-earth element cerium to ooze out from wood activated charcoal, additionally can also wash
Fall and combine unstable cerium.By activation products and mixed in hydrochloric acid so that acid-base neutralization, and then remove alkali metal compound.To neutralize
After activation products and mixed in hydrochloric acid, 55～105 DEG C, wash under the heating condition of preferably 80～100 DEG C 1～24 hour, excellent
Elect 2～15 hours as, more preferably 2～5 hours；Washing times is 2～5 times.The water that washing uses can be distilled water or go
Ionized waters etc., preferably wash under boiling conditions.
In the step (5) of the present invention, by described washed product hot-air fluidized drying to obtain desciccate, it is dried temperature
Degree can be 110～180 DEG C, be preferably 120～150 DEG C.After being sieved by desciccate, obtain wood activated charcoal.Sieve used
The mesh number of net is 32～800 mesh, is preferably 45～460 mesh, is more preferably 50～350 mesh.
<wood activated charcoal>
The mean diameter of the wood activated charcoal of the present invention is 20～500 microns, is preferably 30～350 microns, is preferably 50
～300 microns.Its specific surface area is 500～2800m2/ g, preferably 1000～2500m2/g.In the wood activated charcoal of the present invention
The cerium that can contain 0.1～1.0wt%, the cerium being preferably 0.2～0.8wt%, the cerium of more preferably 0.5～0.7wt%.This
Bright introducing in wood activated charcoal by cerium, at above-mentioned content range, cerium can be stable in the presence of in wood activated charcoal, and can play
Well catalytic action.
The wood activated charcoal of the present invention can use as adsorbent, the adsorbent processed preferably as water, more preferably
The adsorbent of drinking water treatment.
<performance test methods>
The NexION 300X type sense couple plasma mass spectrometer using PE company of the U.S. measures rare earth element content.Its
In, the rare earth element assay in water is with reference to such as Publication about Document: " ICP-MS method measures 17 kinds of rare earth elements in source water simultaneously ",
Fang Yan etc., Shandong chemical industry, the 1st phase of volume 42, the 43-44 page, 2013 years.
The high-speed automated specific surface area of NOVA-1000e type and the lacunarity analysis instrument that use Kang Ta instrument company of the U.S. are (logical
Cross BET method) measure BET specific surface area.
U.S.'s Beckman Kurt LS13-320 series laser Particle Size Analyzer is used to measure mean diameter.
Embodiment 1
By 4 grams of cerium chloride (CeCl3), 30 grams of calcium carbonate add 1000 grams of coconut husk powder (200 mesh) mix homogeneously and are mixed
Compound.This mixture is warming up to 530 DEG C with 10 DEG C/h, after being incubated 10 hours, obtains the first carbonized product.By the first carbonization
Product is warming up to 720 DEG C from 530 DEG C with 60 DEG C/h, is incubated 1 hour, then naturally cools to room temperature, obtains the second carbonization and produces
Thing.Second carbonized product is ground, by 200 eye mesh screens, to obtain the carbon dust that mean diameter is 75 microns, by itself and hydroxide
Potassium (mass ratio is 1:3) mix homogeneously, and load in nickel matter container；This container is heated at continuous activating oven, with 5 DEG C/min
The rate of heat addition be warming up to 400 DEG C, at such a temperature keep 60 minutes, then at 720 DEG C heat 20 minutes, then nitrogen protect
Protect down and be cooled to room temperature, obtain activation products.The hydrochloric acid of activation products 1mol/L is neutralized, then with the hydrochloric acid of 0.1mol/L
(boiling) washs three times, then obtains washed product three times with distilled water (boiling) washing；Washed product is used at 120 DEG C heat empty
Pneumatic conveying drying, and by 200 eye mesh screens, it is thus achieved that wood activated charcoal product A1.After testing, the average particle of this wood activated charcoal product
Footpath is 75 microns, specific surface area is 2010m2/ g, and the cerium containing 0.6wt%.
Wood activated charcoal product A1 is placed in water-purifying filter as adsorbent, tap water is carried out filtration treatment, fortune
After row 1000 hours, water is not detected by Ce elements.
Embodiment 2
In addition to using walnut shell powder (200 mesh) to replace coconut husk powder, other conditions and parameter and embodiment 1 phase
With, it is thus achieved that wood activated charcoal product A2.After testing, the mean diameter of this wood activated charcoal product be 75 microns, specific surface area be
1850m2/ g, and the cerium containing 0.6wt%.
Wood activated charcoal product A2 is placed in water-purifying filter as adsorbent, tap water is carried out filtration treatment, fortune
After row 1000 hours, water is not detected by Ce elements.
Embodiment 3
In addition to using 3 grams of cerium oxide to replace 4 grams of cerium chlorides, other conditions and parameter are same as in Example 1, it is thus achieved that wood
Activated carbon product A3.After testing, the mean diameter of this wood activated charcoal product be 75 microns, specific surface area be 2080m2/ g,
And the cerium containing 0.65wt%.
Wood activated charcoal product A3 is placed in water-purifying filter as adsorbent, tap water is carried out filtration treatment, fortune
After row 1000 hours, water is not detected by Ce elements.
The present invention is not limited to above-mentioned embodiment, in the case of without departing substantially from the flesh and blood of the present invention, and this area skill
Art personnel it is contemplated that any deformation, improve, replace and each fall within the scope of the present invention.
Claims (10)
1. the preparation method of the wood activated charcoal containing cerium, it is characterised in that comprise the steps:
(1) cerium compound, alkaline earth metal compound are mixed homogeneously with vegetable material powder, obtain mixture；
(2) this mixture is carried out at 380～580 DEG C carbonization, to obtain the first carbonized product；
(3) the first carbonized product is carried out at 620～780 DEG C carbonization, be then cooled to room temperature, to obtain the second carbonization product
Thing；
(4) the second carbonized product is ground to carbon dust, it is mixed with alkali metal compound, then 350～800 DEG C of activation,
To obtain activation products；
(5) activation products are obtained wood activated charcoal through process.
Preparation method the most according to claim 1, it is characterised in that: in step (1), cerium compound, alkaline-earth metal
Compound is 0.1～3:2～10:100 with the weight ratio of vegetable material powder.
Preparation method the most according to claim 1, it is characterised in that: in step (1), described cerium compound is nitric acid
Cerium ammonium, cerous nitrate, cerous sulfate, cerous sulfate, cerous carbonate, cerium oxide, cerous acetate or Sedemesis..
Preparation method the most according to claim 1, it is characterised in that in step (1), described alkaline earth metal compound
Selected from the oxide of alkaline-earth metal, hydroxide, chloride, bromide, iodide, fluoride, phosphate, carbonate, sulfuration
Thing, sulfate or nitrate.
Preparation method the most according to claim 1, it is characterised in that: in step (1), described vegetable material powder
Mean diameter is 5～500 mesh, and described vegetable material powder is selected from wood flour, bamboo powder, coconut husk powder, walnut shell powder, cotton
Shell powder, palm shell powder, bagasse powder or pit powder.
Preparation method the most according to claim 1, it is characterised in that: in step (4), described alkali metal compound choosing
From sodium hydroxide or potassium hydroxide；The consumption of described alkali metal compound is 2～5 times of carbon dust weight.
7. according to the preparation method described in any one of claim 1～6, it is characterised in that:
In step (1), cerium compound, alkaline earth metal compound are mixed homogeneously with vegetable material powder, obtains mixture；
In step (2), this mixture is warming up to 380～580 DEG C with 6～20 DEG C/h, at such a temperature insulation 5～20
The first carbonized product is obtained after hour；
In step (3), the first described carbonized product is warming up to 620～780 DEG C with 30～80 DEG C/h, insulation 0.5～
3 hours, then naturally cool to room temperature, obtain the second carbonized product.
8. according to the preparation method described in any one of claim 1～6, it is characterised in that: in step (4), by described
Two carbonized products are ground to the carbon dust that mean diameter is 20～500 microns, are mixed homogeneously with alkali metal compound by this carbon dust, and
Load in container；This container is heated in activation furnace, is warming up to 350～550 DEG C with the rate of heat addition of 3～10 DEG C/min,
Keep 30～100 minutes at a temperature of Gai, heat 10～60 minutes at 750～850 DEG C, then cold under the protection of protective gas
But to room temperature, activation products are obtained.
9. according to the preparation method described in any one of claim 1～6, it is characterised in that:
In step (5), described process is: described activation products neutralized, then with 0.06 with the hydrochloric acid of 0.6～3mol/L
～the salt acid elution of 0.3mol/L, it is washed with water to wash and obtains washed product；By described washed product hot-air fluidized drying, sieve
After obtain wood activated charcoal.
10. the activated carbon obtained by the preparation method described in any one of claim 1～9, it is characterised in that: described wood
The mean diameter of activated carbon is 20～500 microns, and specific surface area is 500～2800m2/ g, and containing 0.1～1.0wt%
Cerium.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004345921A (en) * | 2003-05-23 | 2004-12-09 | Hiroshima Univ | Mesoporous activated carbon |
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| JP2004345921A (en) * | 2003-05-23 | 2004-12-09 | Hiroshima Univ | Mesoporous activated carbon |
| CN101213626A (en) * | 2005-12-21 | 2008-07-02 | 昭和电工株式会社 | Electric double layer capacitor |
| CN101216326A (en) * | 2008-01-08 | 2008-07-09 | 西安石油大学 | Long distance optical fiber grating sensing and transmitting device |
| CN105268425A (en) * | 2014-07-17 | 2016-01-27 | 中国科学院大连化学物理研究所 | Modified active carbon catalyst, and preparation and application thereof |
| CN105664928A (en) * | 2016-03-21 | 2016-06-15 | 张晓菁 | Preparation method of platinum-loading citrus grandis peel activated carbon catalyst for room-temperature degradation of formaldehyde in air |
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