CN102145889A - Technology for preparing active carbon from biomass pyrolysis waste - Google Patents
Technology for preparing active carbon from biomass pyrolysis waste Download PDFInfo
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- CN102145889A CN102145889A CN2011100947686A CN201110094768A CN102145889A CN 102145889 A CN102145889 A CN 102145889A CN 2011100947686 A CN2011100947686 A CN 2011100947686A CN 201110094768 A CN201110094768 A CN 201110094768A CN 102145889 A CN102145889 A CN 102145889A
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Abstract
The invention mainly aims to provide a technology for preparing active carbon from biomass pyrolysis waste. By a method, pyrolysis solids can be recycled. The invention adopts the following technical scheme that the technology for preparing the active carbon from the biomass pyrolysis waste comprises the following steps of: a, firstly adding zinc salt into the pyrolysis waste to carry out activating treatment; b, then filtering the pyrolysis waste subjected to activating treatment and washing the filtered pyrolysis waste into neutrality; and c, finally carrying out carbonization and activating treatment on the washed pyrolysis waste to obtain the active carbon. According to the processing method, the waste can be well utilized; the preparation process is simple; the speed is high; the cost is low; and the adsorption effect of the prepared active carbon is higher by over 10 percent than that of common active carbon, and the iodine adsorption value of the prepared active carbon is more than 1,100mg/g.
Description
Technical field
The present invention relates to a kind of biomass pyrolytic waste that utilizes and prepare activated carbon process, specifically is a kind of method that waste behind the biomass pyrolytic is recycled.
Background technology
Biomass mainly refer to farm crop, oil crops and agriculture organic residuum, forest, forest industry resistates, it is elementary composition by C, H, O, S, P etc., biomass generally are made up of Mierocrystalline cellulose, hemicellulose and xylogen, biomass through pyrolysis is meant that biomass are not having thermo-cracking under oxygen or the anoxia condition fully, and final product is bio-oil, solid waste (biomass carbon dust) and biomass gas.Wherein bio-oil can be used as the use of primary liquid fuel, and solid waste is generally all directly done landfill disposal, is not fully utilized.
Summary of the invention
Main purpose of the present invention provides a kind of biomass pyrolytic waste that utilizes and prepares activated carbon process, and this method can be carried out recycling to the pyrolysis solids.
In order to realize the foregoing invention purpose, the technical solution adopted in the present invention is: a kind of biomass pyrolytic waste that utilizes prepares activated carbon process, may further comprise the steps:
A, at first in the pyrolysis waste, add zinc salt and carry out activation treatment;
B, then the pyrolysis waste of activated processing is filtered, and washing is to neutral;
C, washed pyrolysis waste is carried out carbonization-activation at last and handle and to obtain gac.
According to treatment process of the present invention, the biomass pyrolytic waste is carried out the zinc salt activation, refilter, washing, carbonization-activation is handled and has just been obtained gac, activated carbon is a kind of good sorbent material, and it can be widely used in atmosphere, water purifying treatment owing to have flourishing pore structure, huge surface-area.This technology well uses waste, and preparation process is simple, speed is fast, cost is lower, and the adsorption effect of the gac of producing exceeds more than 10% than common activated carbon, and iodine sorption value is greater than 1100mg/g.
Embodiment
A kind of biomass pyrolytic waste that utilizes prepares activated carbon process, may further comprise the steps:
A, at first in the pyrolysis waste, add zinc salt and carry out activation treatment.Here be zinc salt to be inlaid into start out abundant microporous in the charcoal granule interior structure, to increase the specific surface area of pyrolysis waste.
B, then the pyrolysis waste of activated processing is filtered, and washing is to neutral.This step is that unnecessary activator zinc salt is removed by filter, and water will remain in the activator zinc salt washes clean in the sorbent material, and washing to neutrality is that the decidable washing is thorough.
C, washed pyrolysis waste is carried out carbonization-activation at last and handle and to obtain gac.Carrying out the carbonization-activation processing is the water molecules that adsorbs in the pyrolysis waste that above-mentioned steps is handled in order to remove.
Described zinc salt is a zinc chloride, and the zinc chloride mass concentration is 20～32%, and the mass ratio of described pyrolysis waste and zinc chloride is 1～2; Described activation treatment is to stir 20～40 minutes under the speed that per minute 800～1200 changes.Utilize zinc chloride to make solids form hole, make carbonaceous pyrolysis waste synthesize nonvolatile polycondensation carbon, thereby produce the sorbent material of vesicular structure prosperity by effects such as dehydration, condensation, profit rise.So, adding the activator zinc chloride, sorbent material can produce the porous of structure prosperity, and absorption property will improve.
Described washing is to be washed with distilled water to pH value 6.5～7.0.Activator zinc salt in the pyrolysis waste of activated processing constantly is distilled water dilution, and washing until the zinc salt noresidue in the last pyrolysis waste, is 6.5～7.0 just can stop washing operation to the pH value.
It is charring furnace or retort furnace that described carbonization-activation is handled equipment used; 60～120 minutes carbonization-activation treatment times, 200～350 ℃ of temperature.Charring furnace or retort furnace can ensure that carrying out carbonization-activation under higher temperature handles, thereby obtain acticarbon.Under described time and temperature condition, through the zinc salt activation, filter, the water molecules that adsorbs in the pyrolysis waste of carrying out washing treatment can reach optimum removal effect substantially.
Leave standstill time of repose 18～24 hours after the activation treatment.The pyrolysis waste also needs to leave standstill for some time after the zinc salt activation, leaves standstill and can stablize charcoal granule interior abundant microporous structure, and follow-up filtration washing is convenient in the solid-liquid layering simultaneously.
Embodiment 1
A, at first to add mass concentration in the pyrolysis waste be 20% zinc chloride, stirred 20 minutes under the speed that per minute 800 changes, and left standstill 18 hours, and wherein the mass ratio of pyrolysis waste and zinc chloride is 1.
B, then the pyrolysis waste of activated processing is filtered, and be washed with distilled water to pH value 6.5.
C, the pyrolysis waste after the above-mentioned processing is placed charring furnace carry out carbonization-activation at last to handle and to obtain gac, 60 minutes carbonization-activation treatment times, 200 ℃ of temperature.
Embodiment 2
A, at first to add mass concentration in the pyrolysis waste be 32% zinc chloride, stirred 40 minutes under the speed that per minute 1200 changes, and left standstill 20 hours, and wherein the mass ratio of pyrolysis waste and zinc chloride is 2.
B, then the pyrolysis waste of activated processing is filtered, and be washed with distilled water to pH value 7.0.
C, the pyrolysis waste after the above-mentioned processing is placed retort furnace carry out carbonization-activation at last to handle and to obtain gac, 120 minutes carbonization-activation treatment times, 350 ℃ of temperature.
Embodiment 3
A, at first to add mass concentration in the pyrolysis waste be 25% zinc chloride, stirred 30 minutes under the speed that per minute 1000 changes, and left standstill 24 hours, and wherein the mass ratio of pyrolysis waste and zinc chloride is 1.5.
B, then the pyrolysis waste of activated processing is filtered, and be washed with distilled water to pH value 6.8.
C, the pyrolysis waste after the above-mentioned processing is placed charring furnace carry out carbonization-activation at last to handle and to obtain gac, 90 minutes carbonization-activation treatment times, 300 ℃ of temperature.
By above this technology that experiment showed, waste is well used, preparation process is simple, speed is fast, cost is lower, and the adsorption effect of the gac of producing exceeds more than 10% than common activated carbon, and iodine sorption value is greater than 1100mg/g.
Claims (5)
1. one kind is utilized the biomass pyrolytic waste to prepare activated carbon process, may further comprise the steps:
A, at first in the pyrolysis waste, add zinc salt and carry out activation treatment;
B, then the pyrolysis waste of activated processing is filtered, and washing is to neutral;
C, washed pyrolysis waste is carried out carbonization-activation at last and handle and to obtain gac.
2. a kind of biomass pyrolytic waste that utilizes according to claim 1 prepares activated carbon process, and it is characterized in that: described zinc salt is a zinc chloride, and the zinc chloride mass concentration is 20～32%, and the mass ratio of described pyrolysis waste and zinc chloride is 1～2; Described activation treatment is to stir 20～40 minutes under the speed that per minute 800～1200 changes.
3. a kind of biomass pyrolytic waste that utilizes according to claim 1 prepares activated carbon process, and it is characterized in that: described washing is to be washed with distilled water to pH value 6.5～7.0.
4. a kind of biomass pyrolytic waste that utilizes according to claim 1 prepares activated carbon process, it is characterized in that: it is charring furnace or retort furnace that described carbonization-activation is handled equipment used; 60～120 minutes carbonization-activation treatment times, 200～350 ℃ of temperature.
5. a kind of biomass pyrolytic waste that utilizes according to claim 1 and 2 prepares activated carbon process, it is characterized in that: leave standstill time of repose 18～24 hours after the activation treatment.
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| CN 201110094768 CN102145889B (en) | 2011-04-15 | 2011-04-15 | Technology for preparing active carbon from biomass pyrolysis waste |
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| CN 201110094768 CN102145889B (en) | 2011-04-15 | 2011-04-15 | Technology for preparing active carbon from biomass pyrolysis waste |
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| CN102145889A true CN102145889A (en) | 2011-08-10 |
| CN102145889B CN102145889B (en) | 2013-06-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102530940A (en) * | 2011-12-12 | 2012-07-04 | 张荣斌 | Method for producing active carbon by using waste |
| CN107337206A (en) * | 2017-07-19 | 2017-11-10 | 合肥工业大学 | A kind of activated carbon for the method and its preparation that activated carbon is prepared using biomass as raw material |
Citations (6)
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|---|---|---|---|---|
| CH589007A5 (en) * | 1973-05-04 | 1977-06-30 | Boehlen Bruno | Active carbon prodn. from organic polymers - by carbonisation in presence of zinc chloride |
| CN1108212A (en) * | 1994-03-09 | 1995-09-13 | 卢元健 | Method for prodn. of activated carbon |
| CN1587036A (en) * | 2004-07-09 | 2005-03-02 | 华东理工大学 | Use of biomass cracking residual carbon |
| CN101177263A (en) * | 2007-11-09 | 2008-05-14 | 曾勇 | Method for producing activative carbon by tobacco solid waste |
| CN101332992A (en) * | 2008-07-31 | 2008-12-31 | 福建师范大学 | Method for preparing tung cell-based active carbon by zinc chloride chemical activation method |
| CN101993070A (en) * | 2010-11-30 | 2011-03-30 | 南通新景华企业管理服务有限公司 | Method for preparing active carbon from rice husk |
-
2011
- 2011-04-15 CN CN 201110094768 patent/CN102145889B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH589007A5 (en) * | 1973-05-04 | 1977-06-30 | Boehlen Bruno | Active carbon prodn. from organic polymers - by carbonisation in presence of zinc chloride |
| CN1108212A (en) * | 1994-03-09 | 1995-09-13 | 卢元健 | Method for prodn. of activated carbon |
| CN1587036A (en) * | 2004-07-09 | 2005-03-02 | 华东理工大学 | Use of biomass cracking residual carbon |
| CN101177263A (en) * | 2007-11-09 | 2008-05-14 | 曾勇 | Method for producing activative carbon by tobacco solid waste |
| CN101332992A (en) * | 2008-07-31 | 2008-12-31 | 福建师范大学 | Method for preparing tung cell-based active carbon by zinc chloride chemical activation method |
| CN101993070A (en) * | 2010-11-30 | 2011-03-30 | 南通新景华企业管理服务有限公司 | Method for preparing active carbon from rice husk |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102530940A (en) * | 2011-12-12 | 2012-07-04 | 张荣斌 | Method for producing active carbon by using waste |
| CN107337206A (en) * | 2017-07-19 | 2017-11-10 | 合肥工业大学 | A kind of activated carbon for the method and its preparation that activated carbon is prepared using biomass as raw material |
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| CN102145889B (en) | 2013-06-05 |
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