CN109607534A - A kind of processing technology using bagasse production active carbon - Google Patents
A kind of processing technology using bagasse production active carbon Download PDFInfo
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- CN109607534A CN109607534A CN201910080801.6A CN201910080801A CN109607534A CN 109607534 A CN109607534 A CN 109607534A CN 201910080801 A CN201910080801 A CN 201910080801A CN 109607534 A CN109607534 A CN 109607534A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/342—Preparation characterised by non-gaseous activating agents
- C01B32/348—Metallic compounds
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/324—Preparation characterised by the starting materials from waste materials, e.g. tyres or spent sulfite pulp liquor
Abstract
The invention discloses a kind of processing technologys using bagasse production active carbon, including dipping, charing, activation, pickling, drying and other steps.The present invention carries out activation bagasse using lye and prepares active carbon, and reaction is fierce, and activation temperature is lower, the time is short, the active carbon hole of production is very more, lower production costs, active carbon yield is high, has many advantages, such as that large specific surface area, aperture are small, adsorption cycle is long, intensity is big, adsorption capacity is strong；It not only solves bagasse waste entrainment environment and avoids the waste problem of resource, moreover it is possible to reduce the wasting of resources, turn waste into wealth, preserve the ecological environment, added value of product is high, improves the social and economic benefit of sugar industry.
Description
Technical field
The invention belongs to solid waste resource recovery processing technology fields more particularly to a kind of utilization bagasse to produce active carbon
Processing technology.
Background technique
Since 1992, Guangxi becomes China's plantation, the sugar cane production district that production scale is concentrated and Sugar Production area,
Sugarcane acreage and sucrose yield account for 60% or more the whole nation, are surely the first in the nation.The existing 4 sugar wholesale markets in the whole nation
In 3 in Guangxi, Guangxi becomes that whole nation sucrose worthy of the name is leading to be saved.Currently, China is the big Sugar Production state in third place in the world,
Production sugar province of the Guangxi as Largest In China, output of sugar account for the 63% of national total output, have become the most important sugar in China
Base.Guangxi increases income by plantation raw material sugarcane now with 12,700,000 peasants and shakes off poverty and sets out on the road to prosperity, and sugarcane acreage is up to
15290000 mu, the 1/3 of Zhan Quanqu cultivated area: output of sugar accounts for the 65.37% of national total output of sugar, Guangxi District up to 675.2 ten thousand tons
There are more than 2,670 ten thousand peasant planting sugarcanes, is the 56.35% of Guangxi total population.According to statistics, the sucrose for often producing 1t will generate
The bagasse of about 1-2t, and sucrose annual output cannot such as be dealt carefully in about 10,000,000 t or so in recent years in China, not only resource
It cannot efficiently use, also will cause environmental pollution.
Bagasse is the fibroid residue after the extracted sugarcane juice of herbaceous plant sugarcane, and main component is cellulose and wooden
Element, wherein cellulose and hemicellulose account for 32%-48% and 19%-24% respectively, and lignin accounts for about 23%-32%, ash content
About 4%, fibre length is about 0.65-2.17mm, and width is 21-28 μm, large specific surface area, is the ideal material for preparing active carbon
Material.Bagasse is one of the key project of one of Main By product of sugar industry and sugar industry comprehensive utilization.Currently, many sweet
Mostly using bagasse as fuel power generation function and papermaking, the bagasse of Guangxi sugar enterprise is mainly used for for Sugarcane Industry country, India, Thailand
Boiler oil and papermaking, or it is used as simple fuel, so that bagasse is not fully used, comprehensive utilization ratio is not
Height results in waste of resources, and treatment process can generate the harmful substances such as a large amount of carbon dioxide, cause secondary pollution, not be inconsistent
Close the requirement of social environment protection.Therefore, how bagasse to be carried out high efficient resourcing processing to utilize being that cane mill is badly in need of facing
Problem.
Active carbon is black powder or bulk, graininess, cellular amorphous carbon, also there is the crystal of arranged regular
Carbon.Active carbon is a kind of high surface carbonaceous material with abundant pore structure and huge specific surface area, since its is loose porous
Structure, big specific surface area, very high surface-active and adsorption capacity and become attached dose of multifunctional ceiling, be widely used in production,
In life.Bagasse is the very good material for preparing activated carbon from activated sludge due to its natural loose and porous structure.It is sweet in order to mitigate
The waste problem of environmental pollution and resource caused by bagasse, people are prepared with bagasse to be had compared with multi-pore structure and very big ratio
The active carbon of surface area, active carbon, which is made, in bagasse can not only solve the problems, such as bagasse waste entrainment, moreover it is possible to turns waste into wealth,
It preserves the ecological environment, improves the economic benefit of sugar industry.There is pertinent literature to disclose at present and active carbon, example are prepared using bagasse
Such as:
1, patent application CN201710606955.5 discloses a kind of method using bagasse production active carbon, the party
Method includes the following steps: the mixed aqueous solution dipping of (1) bagasse ferric nitrate and zinc chloride；(2) it will be handled through step (1)
Bagasse is activated at 400~700 DEG C, obtains active carbon.Compared with prior art, method of the invention is to equipment requirement
Low, production cost is low, and active carbon yield is high, and absorption property meets national standard.
2, patent application CN201710266775.7 discloses a kind of method for preparing active carbon using bagasse, will be sweet
It is crushed after bagasse drying, is then added in sodium carbonate liquor and impregnates 10-20h, the bagasse and sodium carbonate liquor after drying
Weight ratio is 1:3-6；By the bagasse dehydration after immersion, it is subsequently placed in Muffle furnace and carries out charing process, obtain carbide；It will
Carbide chlorohydric acid pickling, then be washed to neutrality, finally dry and be sieved to get.This method solve the recycling of bagasse,
The waste and environmental pollution for avoiding resource provide effective way, can be directly used for sugaring work by the active carbon that it is prepared
Industry, added value of product is high, can produce good social and economic benefit, and the active carbon decoloring energy that the method for the present invention is prepared into
Power is strong, and stability is good, and intensity is high, safe and non-toxic.
But prior art bagasse active carbon exists in use that adsorption cycle is short, intensity is low, absorption property compared with
The variety of problems such as difference, and activation required temperature is higher, processing cost is increased, to constrain the use of bagasse active carbon.
Summary of the invention
The present invention is in order to solve the above technical problems, provide a kind of processing technology using bagasse production active carbon.This hair
Bright use lye carries out activation bagasse and prepares active carbon, and reaction is fierce, and activation temperature is lower, the time is short, the active carbon of production
Hole is very more, lower production costs, and active carbon yield is high, and with large specific surface area, aperture is small, adsorption cycle is long, intensity is big, inhales
The advantages that attached ability is strong；It not only solves bagasse waste entrainment environment and avoids the waste problem of resource, moreover it is possible to reduce resource
Waste, turns waste into wealth, preserves the ecological environment, and added value of product is high, improves the social and economic benefit of sugar industry.
In order to reach purpose described above, the invention adopts the following technical scheme:
A kind of processing technology using bagasse production active carbon, comprising the following steps:
(1) it impregnates: being put into the mixed aqueous solution of isometric sodium carbonate and potassium nitrate and impregnated into bagasse, often
Press filtration removes filtrate, is sent into drying machine and dries, was crushed to the bagasse grain of 50 meshes；
(2) it carbonizes: under nitrogen protection, above-mentioned bagasse being placed in quartz boat, is then transferred in closed tube furnace,
Be heated to carbon granule it is red vehement or no longer generate gas after stop heating, be cooled to room temperature, be sent into grinder grind and cross 60~90 mesh
Sieve obtains bagasse carbon granule；
(3) it activates: taking above-mentioned bagasse carbon granule, the lye that 2/3rds volume of bagasse carbon granule is added and heating is activated,
Obtain activation bagasse；
(4) pickling: the bagasse after above-mentioned activation is cleaned with isometric diluted acid, and distilled water is then added and boils simultaneously
20~25min is kept the temperature, distillation is washed to solution and is in neutrality, and obtains active carbon semiproduct；
(5) dry: the good active carbon semiproduct of pickling to be put into 95~110 DEG C of electric heating constant-temperature blowing drying box dry
The active carbon is made in 3.5~5h.
Further, in step (1), the concentration of the sodium carbonate liquor is 3~5mol/L.
Further, in step (1), the time of the dipping is 6~20h.
Further, in step (1), the temperature of the drying is 90~100 DEG C.
Further, in step (1), sodium carbonate and potassium nitrate quality in the mixed aqueous solution of the sodium carbonate and potassium nitrate
Than being 2: 3.2~4.
Further, in step (2), the heating is that 200~250 DEG C of carbonization temperature are risen to from room temperature, control heating speed
Rate is 4~6 DEG C/min.
Further, in step (3), the lye is that concentration is 1.8~2.1mol/L.
Further, in step (3), the lye is that KOH solution and NaOH solution are mixed for 4~4.5: 1 according to mass ratio
Conjunction is made.
Further, in step (3), the temperature of the activation is 420~480 DEG C, and the time is 20~40min.
Further, in step (4), the diluted acid be one of carbonic acid, nitric acid, phosphoric acid or more than one, the carbon
The concentration of acid is 0.1~0.3mol/L, and the concentration of the nitric acid is 0.05~0.2mol/L, the concentration of the phosphoric acid is 0.1~
0.2mol/L。
The application, using scientific and reasonable KOH and NaOH ratio, enhances the adsorptivity of active carbon in activation processing
Energy.The ratio of KOH and NaOH directly influences the adsorption capacity of active carbon in lye, with the increase of KOH content, active carbon
Adsorptive value totally shows the changing rule of first increases and then decreases, at KOH: NaOH=4~4.5: 1, the adsorption energy of active carbon
Power is preferable.This is because priming reaction aggravates with the increase of KOH dosage, micropore and mesoporous are constantly formed in active carbon, is adsorbed
Performance enhancement；When KOH dosage reaches a certain level, the etching degree of material is increased, the active site in carbochain constantly reacts
Gasification, aperture declines lead to the expansion and collapsing in hole, form mesoporous and macropore, adsorptivity is caused to reduce.
The application prepares the own characteristic of active carbon according to bagasse, joined unique dipping, charing preprocessing process, mentions
The high yield and absorption property of active carbon；It is such as pre-processed without dipping, charing, active carbon is directly prepared, although also can
Activated carbon product is obtained, but will lead to product yield reduction, activation time increases, and absorption property also reduces.
From document (" Study on Preparation of mixing alkaline process bagasse matrix activated carbon ", Guangxi science, Jiang Enyuan etc., 2009-
Conclusion 05-15) obtained: the strong and weak order of the technological factor of bagasse active carbon absorption property is influenced are as follows: activation time, activation
Temperature, activator proportion, solid-liquid ratio, it follows that the length of activation time directly influences the absorption property of active carbon, this Shen
Please processing technology greatly reduce activation time so that the absorption property of bagasse active carbon obtains larger raising.
Active carbon yield=active carbon dry weight (g)/bagasse dry weight (g) X100% of the present invention.
Adsorption rate described herein is calculated using following formula:
In above formula: C0For the initial concentration (mg/m of formaldehyde in experimental box3)；After C is absorbent charcoal material absorption in experimental box
Equilibrium concentration (mg/m3)；The calculating of the application adsorption rate is the adsorption rate of absorbent charcoal material absorption 30min.
Since present invention employs above technical schemes, have the advantages that
(1) the application carries out activation bagasse using lye and prepares active carbon, and reaction is fierce, and activation temperature is lower, the time
Short, the active carbon hole of production is very more, lower production costs, and active carbon yield is high, and with large specific surface area, aperture is small, adsorbs
The advantages that period is long, intensity is big, adsorption capacity is strong.
(2) present invention use bagasse to prepare active carbon for raw material, not only solve bagasse waste entrainment environment with
Avoid the waste problem of resource, moreover it is possible to reduce the wasting of resources, turn waste into wealth, preserve the ecological environment, added value of product is high, improves sugarcane
The social and economic benefit of sugared industry；Preparation is simple, reduces activation temperature and time, while also reducing processing cost, living
Property charcoal yield is 56.87~72.93%, intensity is 93~98%, and active carbon stability obtained is good, intensity is high, safe nothing
Poison promotes the development of bagasse active carbon.
(3) active carbon produced by the present invention meets the correlation in country-level active carbon standard (GB/T13803.4-1999)
Regulation, specific surface area can reach 3200~3600m2/ g, formaldehyde absorbing rate are 55.6~75.3%, and methylene blue adsorption value is
13.5~16.8mL/0.1g.
Specific embodiment
Specific embodiments of the present invention will be described in further detail below, but the invention is not limited to these realities
Mode is applied, it is claimed to still fall within the claims in the present invention for any improvement or replacement on the present embodiment essence spirit
Range.
In the application: 1, the model OTF-1200X type of the vacuum tube furnace, buying, which gets over laboratory apparatus from Shanghai Shanghai, to be had
Limit company；2, the model 101-1AB type of electric heating constant-temperature blowing drying box, buying are public from Jinhua Ji Changte laboratory apparatus science and technology
Department；3, pulverizer uses crusher for Chinese herbal medicine, and model LEP-800T is purchased from the prosperous limited public affairs of Yuhua laboratory apparatus in Foochow
Department.
Embodiment 1
A kind of processing technology using bagasse production active carbon, comprising the following steps:
(1) it impregnates: being put into the mixed aqueous solution of isometric sodium carbonate and potassium nitrate and impregnated into bagasse, often
Press filtration removes filtrate, is sent into drying machine and dries, was crushed to the bagasse grain of 50 meshes；The concentration of the sodium carbonate liquor is
3mol/L；The time of the dipping is 6h；The temperature of the drying is 90 DEG C；In the sodium carbonate and potassium nitrate mixed aqueous solution
Sodium carbonate and potassium nitrate mass ratio are 2: 3.2；
(2) it carbonizes: under nitrogen protection, above-mentioned bagasse being placed in quartz boat, is then transferred in closed tube furnace,
Be heated to carbon granule it is red vehement or no longer generate gas after stop heating, be cooled to room temperature, be sent into grinder grind and cross 60 meshes, obtain
Obtain bagasse carbon granule；The heating is that 200 DEG C of carbonization temperature are risen to from room temperature, and control heating rate is 4 DEG C/min；
(3) it activates: taking above-mentioned bagasse carbon granule, the lye that 2/3rds volume of bagasse carbon granule is added and heating is activated,
Obtain activation bagasse；The lye is that concentration is 1.8mol/L；The lye is that KOH solution and NaOH solution are according to mass ratio
Be mixed at 4: 1；The temperature of the activation is 420 DEG C, time 20min；
(4) pickling: the bagasse after above-mentioned activation is cleaned with isometric diluted acid, and distilled water is then added and boils simultaneously
20min is kept the temperature, distillation is washed to solution and is in neutrality, and obtains active carbon semiproduct；The diluted acid is carbonic acid, nitric acid, in phosphoric acid
One or more, the concentration of the carbonic acid are 0.1mol/L, and the concentration of the nitric acid is 0.05mol/L, the phosphoric acid
Concentration is 0.1mol/L；
(5) dry: the good active carbon semiproduct of pickling is put into 95 DEG C of electric heating constant-temperature blowing drying box dry 3.5h,
The active carbon is made.
Embodiment 2
A kind of processing technology using bagasse production active carbon, comprising the following steps:
(1) it impregnates: being put into the mixed aqueous solution of isometric sodium carbonate and potassium nitrate and impregnated into bagasse, often
Press filtration removes filtrate, is sent into drying machine and dries, was crushed to the bagasse grain of 50 meshes；The concentration of the sodium carbonate liquor is
3mol/L；The time of the dipping is 6h；The temperature of the drying is 90 DEG C；In the sodium carbonate and potassium nitrate mixed aqueous solution
Sodium carbonate and potassium nitrate mass ratio are 2: 4；
(2) it carbonizes: under nitrogen protection, above-mentioned bagasse being placed in quartz boat, is then transferred in closed tube furnace,
Be heated to carbon granule it is red vehement or no longer generate gas after stop heating, be cooled to room temperature, be sent into grinder grind and cross 90 meshes, obtain
Obtain bagasse carbon granule；The heating is that 250 DEG C of carbonization temperature are risen to from room temperature, and control heating rate is 6 DEG C/min；
(3) it activates: taking above-mentioned bagasse carbon granule, the lye that 2/3rds volume of bagasse carbon granule is added and heating is activated,
Obtain activation bagasse；The lye is that concentration is 2.1mol/L；The lye is that KOH solution and NaOH solution are according to mass ratio
Be mixed at 4.5: 1；The temperature of the activation is 480 DEG C, time 40min；
(4) pickling: the bagasse after above-mentioned activation is cleaned with isometric diluted acid, and distilled water is then added and boils simultaneously
25min is kept the temperature, distillation is washed to solution and is in neutrality, and obtains active carbon semiproduct；The diluted acid is carbonic acid, nitric acid, in phosphoric acid
One or more, the concentration of the carbonic acid are 0.3mol/L, and the concentration of the nitric acid is 0.2mol/L, the phosphoric acid it is dense
Degree is 0.2mol/L；
(5) dry: the good active carbon semiproduct of pickling is put into 110 DEG C of electric heating constant-temperature blowing drying box dry 5h,
The active carbon is made.
Embodiment 3
A kind of processing technology using bagasse production active carbon, comprising the following steps:
(1) it impregnates: being put into the mixed aqueous solution of isometric sodium carbonate and potassium nitrate and impregnated into bagasse, often
Press filtration removes filtrate, is sent into drying machine and dries, was crushed to the bagasse grain of 50 meshes；The concentration of the sodium carbonate liquor is
3.5mol/L；The time of the dipping is 8h；The drying temperature is 92 DEG C；The mixed aqueous solution of the sodium carbonate and potassium nitrate
Middle sodium carbonate and potassium nitrate mass ratio are 2: 3.3；
(2) it carbonizes: under nitrogen protection, above-mentioned bagasse being placed in quartz boat, is then transferred in closed tube furnace,
Be heated to carbon granule it is red vehement or no longer generate gas after stop heating, be cooled to room temperature, be sent into grinder grind and cross 70 meshes, obtain
Obtain bagasse carbon granule；The heating is that 210 DEG C of carbonization temperature are risen to from room temperature, and control heating rate is 4.5 DEG C/min；
(3) it activates: taking above-mentioned bagasse carbon granule, the lye that 2/3rds volume of bagasse carbon granule is added and heating is activated,
Obtain activation bagasse；The lye is that concentration is 1.9mol/L；The lye is that KOH solution and NaOH solution are according to mass ratio
Be mixed at 4.1: 1；The temperature of the activation is 430 DEG C, time 25min；
(4) pickling: the bagasse after above-mentioned activation is cleaned with isometric diluted acid, and distilled water is then added and boils simultaneously
21min is kept the temperature, distillation is washed to solution and is in neutrality, and obtains active carbon semiproduct；The diluted acid is carbonic acid, nitric acid, in phosphoric acid
One or more, the concentration of the carbonic acid are 0.15mol/L, and the concentration of the nitric acid is 0.12mol/L, the phosphoric acid
Concentration is 0.15mol/L；
(5) dry: the good active carbon semiproduct of pickling is put into 96 DEG C of electric heating constant-temperature blowing drying box dry 4h, system
Obtain the active carbon.
Embodiment 4
A kind of processing technology using bagasse production active carbon, comprising the following steps:
(1) it impregnates: being put into the mixed aqueous solution of isometric sodium carbonate and potassium nitrate and impregnated into bagasse, often
Press filtration removes filtrate, is sent into drying machine and dries, was crushed to the bagasse grain of 50 meshes；The concentration of the sodium carbonate liquor is
4.5mol/L；The time of the dipping is 18h；The drying temperature is 99 DEG C；The mixing of the sodium carbonate and potassium nitrate is water-soluble
Sodium carbonate and potassium nitrate mass ratio are 2: 3.9 in liquid；
(2) it carbonizes: under nitrogen protection, above-mentioned bagasse being placed in quartz boat, is then transferred in closed tube furnace,
Be heated to carbon granule it is red vehement or no longer generate gas after stop heating, be cooled to room temperature, be sent into grinder grind and cross 80 meshes, obtain
Obtain bagasse carbon granule；The heating is that 240 DEG C of carbonization temperature are risen to from room temperature, and control heating rate is 5.5 DEG C/min；
(3) it activates: taking above-mentioned bagasse carbon granule, the lye that 2/3rds volume of bagasse carbon granule is added and heating is activated,
Obtain activation bagasse；The lye is that concentration is 2.0mol/L；The lye is that KOH solution and NaOH solution are according to mass ratio
Be mixed at 4.4: 1；The temperature of the activation is 470 DEG C, time 35min；
(4) pickling: the bagasse after above-mentioned activation is cleaned with isometric diluted acid, and distilled water is then added and boils simultaneously
20~25min is kept the temperature, distillation is washed to solution and is in neutrality, and obtains active carbon semiproduct；The diluted acid is carbonic acid, nitric acid, phosphoric acid
One of or more than one, the concentration of the carbonic acid is 0.25mol/L, and the concentration of the nitric acid is 0.18mol/L, the phosphorus
The concentration of acid is 0.18mol/L；
(5) dry: the good active carbon semiproduct of pickling is put into 109 DEG C of electric heating constant-temperature blowing drying box dry 3.5
The active carbon is made in~5h.
Embodiment 5
A kind of processing technology using bagasse production active carbon, comprising the following steps:
(1) it impregnates: being put into the mixed aqueous solution of isometric sodium carbonate and potassium nitrate and impregnated into bagasse, often
Press filtration removes filtrate, is sent into drying machine and dries, was crushed to the bagasse grain of 50 meshes；The concentration of the sodium carbonate liquor is
4mol/L；The time of the dipping is 12h；The temperature of the drying is 95 DEG C；The mixing of the sodium carbonate and potassium nitrate is water-soluble
Sodium carbonate and potassium nitrate mass ratio are 2: 3.6 in liquid；
(2) it carbonizes: under nitrogen protection, above-mentioned bagasse being placed in quartz boat, is then transferred in closed tube furnace,
Be heated to carbon granule it is red vehement or no longer generate gas after stop heating, be cooled to room temperature, be sent into grinder grind and cross 80 meshes, obtain
Obtain bagasse carbon granule；The heating is that 230 DEG C of carbonization temperature are risen to from room temperature, and control heating rate is 5 DEG C/min；
(3) it activates: taking above-mentioned bagasse carbon granule, the lye that 2/3rds volume of bagasse carbon granule is added and heating is activated,
Obtain activation bagasse；The lye is that concentration is 2mol/L；The lye is that KOH solution and NaOH solution are according to mass ratio
Be mixed at 4.2: 1；The temperature of the activation is 450 DEG C, time 30min；
(4) pickling: the bagasse after above-mentioned activation is cleaned with isometric diluted acid, and distilled water is then added and boils simultaneously
23min is kept the temperature, distillation is washed to solution and is in neutrality, and obtains active carbon semiproduct；The diluted acid is carbonic acid, nitric acid, in phosphoric acid
One or more, the concentration of the carbonic acid are 0.2mol/L, and the concentration of the nitric acid is 0.13mol/L, the phosphoric acid
Concentration is 0.15mol/L；
(5) dry: the good active carbon semiproduct of pickling to be put into 105 DEG C of electric heating constant-temperature blowing drying box dry
The active carbon is made in 4.3h.
Comparative example 1
According to patent application CN201710606955.5 (title: a method of utilize bagasse produce active carbon) in
Embodiment carries out.
Comparative example 2
According to patent application CN201710266775.7 (title: a method of preparing active carbon using bagasse) in
Embodiment carries out.
The technical effect can be reached in order to further illustrate the present invention, do following experiment:
Bagasse active carbon made from the embodiment of the present application 1~5 and comparative example 1~2 is subjected to specific surface area, intensity, work
The performance of property charcoal yield, methylene blue adsorption value and formaldehyde absorbing rate is detected, and performance test results are as shown in following table table 1.
Table 1
As 1 experimental data of table it is found that active carbon made from the application is compared with comparative example, specific surface area, intensity, adsorption rate
Etc. performances it is preferable, wherein specific surface area can reach 3200~3600m2/ g, intensity are 93~98%, and active carbon yield is 56.87
~72.93%, methylene blue adsorption value is 13.5~16.8mL/0.1g, and formaldehyde absorbing rate is 55.6~75.3%.
In conclusion the present invention, which carries out activation bagasse using lye, prepares active carbon, reaction is fierce, activation temperature compared with
It is low, the time is short, the active carbon hole of production is very more, lower production costs, and active carbon yield is high, has large specific surface area, aperture
Small, the advantages that adsorption cycle is long, intensity is big, adsorption capacity is strong；It not only solves bagasse waste entrainment environment and avoids resource
Waste problem, moreover it is possible to reduce the wasting of resources, turn waste into wealth, preserve the ecological environment, added value of product is high, improves sugar industry
Social and economic benefit.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, nothing
By from the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended
Claim rather than above description limit, it is intended that by the institute in the meaning and scope for the equivalent loins for falling in claim
It changes and includes within protection scope of the present invention.
Claims (10)
1. a kind of processing technology using bagasse production active carbon, which comprises the following steps:
(1) it impregnates: being put into the mixed aqueous solution of isometric sodium carbonate and potassium nitrate and impregnated into bagasse, normal pressure mistake
It filters off and removes filtrate, be sent into drying machine and dry, be crushed to the bagasse grain of 50 meshes；
(2) it carbonizes: under nitrogen protection, above-mentioned bagasse being placed in quartz boat, is then transferred in closed tube furnace, heat
To carbon granule it is red vehement or no longer generate gas after stop heating, be cooled to room temperature, be sent into grinder grind and cross 60~90 meshes, obtain
Obtain bagasse carbon granule；
(3) it activates: taking above-mentioned bagasse carbon granule, the lye that 2/3rds volume of bagasse carbon granule is added and heating is activated obtains
Activate bagasse；
(4) pickling: the bagasse after above-mentioned activation is cleaned with isometric diluted acid, and distilled water is then added and boils and keeps the temperature
20~25min, distillation are washed to solution and are in neutrality, and obtain active carbon semiproduct；
(5) dry: the good active carbon semiproduct of pickling is put into 95~110 DEG C of electric heating constant-temperature blowing drying box dry 3.5
The active carbon is made in~5h.
2. a kind of processing technology using bagasse production active carbon according to claim 1, it is characterised in that: in step
(1), the concentration of the sodium carbonate liquor is 3~5mol/L.
3. a kind of processing technology using bagasse production active carbon according to claim 1, it is characterised in that: in step
(1), the time of the dipping is 6~20h.
4. a kind of processing technology using bagasse production active carbon according to claim 1, it is characterised in that: in step
(1), the temperature of the drying is 90~100 DEG C.
5. a kind of processing technology using bagasse production active carbon according to claim 1, it is characterised in that: in step
(1), sodium carbonate and potassium nitrate mass ratio are 2: 3.2~4 in the mixed aqueous solution of the sodium carbonate and potassium nitrate.
6. a kind of processing technology using bagasse production active carbon according to claim 1, it is characterised in that: in step
(2), the heating is that 200~250 DEG C of carbonization temperature are risen to from room temperature, and control heating rate is 4~6 DEG C/min.
7. a kind of processing technology using bagasse production active carbon according to claim 1, it is characterised in that: in step
(3), it is 1.8~2.1mol/L that the lye, which is concentration,.
8. a kind of processing technology using bagasse production active carbon according to claim 1, it is characterised in that: in step
(3), the lye is that KOH solution and NaOH solution are mixed according to mass ratio for 4~4.5: 1.
9. a kind of processing technology using bagasse production active carbon according to claim 1, it is characterised in that: in step
(3), the temperature of the activation is 420~480 DEG C, and the time is 20~40min.
10. a kind of processing technology using bagasse production active carbon according to claim 1, it is characterised in that: in step
(4), the diluted acid be one of carbonic acid, nitric acid, phosphoric acid or more than one, the concentration of the carbonic acid is 0.1~0.3mol/L,
The concentration of the nitric acid is 0.05~0.2mol/L, and the concentration of the phosphoric acid is 0.1~0.2mol/L.
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