CN1491886A - Process for preparing active carbon - Google Patents
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- CN1491886A CN1491886A CNA021460043A CN02146004A CN1491886A CN 1491886 A CN1491886 A CN 1491886A CN A021460043 A CNA021460043 A CN A021460043A CN 02146004 A CN02146004 A CN 02146004A CN 1491886 A CN1491886 A CN 1491886A
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Abstract
The preparation process of active carbon has high active carbon yield, high active carbon strength, and high gas separating and adsorbing performance of the active carbon. The technological scheme of the present invention is to carbonize and activate carbon containing material to obtain active carbon, and activating agent for the activating process consists of oxidant and reductant. The activation process is completed under oxidation and reduction condition and the surface performance of the active carbon is altered, so that the produced active carbon has raised adsorption performance and chemical performance, including 10-30 % raised adsorbing capacity and desulfurizing capacity, raised pore size distribution homogeneity and strengthened gas separating capacity as well as 2-15 % raised product yield. The process of the present invention may be used in producing high quality active carbon for different purposes.
Description
Technical field
The present invention relates to a kind of preparation process of active carbon.
Background technology
At present the production process of active carbon mainly is divided into two kinds of physical activation method and chemical activation methods.Chemical activation method is to use ZnCl
2, chemical agent such as KOH makees activator, the activation carbon containing matter prepares gac under 500-800 ℃, condition of normal pressure.Because this method environmental pollution is serious, seldom adopt in recent years.Physical activation method is contenting carbon material charing under condition of normal pressure, uses oxidizing gas such as water vapor, CO then
2, oxygen or several oxidizing gas gas mixture make activator, under 700-1000 ℃ of hot conditions with carbon generation oxidizing reaction, the preparation gac, its technological process of production as shown in Figure 1.
Summary of the invention
The purpose of this invention is to provide a kind of preparation process of active carbon, utilize this method to prepare gac, can improve the gac yield, strengthen gac intensity, gas separating property and absorption property.
For achieving the above object, the present invention by the following technical solutions: a kind of preparation process of active carbon is that contenting carbon material is obtained gac through charing and after activating, and the activator in the described reactivation process is made up of oxidation and reducing gas.
The volume parts ratio that described oxidizing gas and reducing gas account for activator is respectively 99%-60% and 1%-40%.
Described oxidizing gas is selected from one or more in water vapour, carbonic acid gas, flue gas and the oxygen; Reducing gas is selected from one or more in ammonia, hydrogen, methylamine, ethene and the acetylene.
Redox processes both can be that oxidation and reducing gas are carried out after mixing simultaneously, also can carry out separately respectively, reduced promptly earlier with oxidizing gas oxidation pore-creating, and then with reducing gas, changed the surface properties of gac.No matter oxidation, reduction are carried out simultaneously, still separately carry out, and all can improve the gac yield, improve the characteristics such as intensity, gas separating property and absorption property of gac.
The temperature of described reactivation process is 650-1000 ℃.
Described reactivation process can be carried out under normal pressure, also can carry out under the condition of pressurization, if carry out under pressurized conditions, institute's plus-pressure is 0.3-5MPa.
Pressurization preparation activated carbon process condition is as shown in table 1.
Table 1, pressurization preparation activated carbon process condition
| Condition of carbonization | The activating process condition |
| Warm 500 ℃-650 ℃ eventually of charings | Activation temperature 700-950 ℃ |
| 2-8 ℃ of carbonization yield 72%-88% of charing heat-up rate pressure | Hydrogen or ammonia level 5% activation yield 30%-50% pressure in the activator |
Method of the present invention is suitable for utilizing various contenting carbon materials to make gac, and for example bituminous coal, hard coal, brown coal, timber and shell etc. all can.
The present invention is owing to adopted above-mentioned technology, make the carbon activation generate gac by oxidizing gas and carbon generation oxidizing reaction in the activator, simultaneously owing to contain reducing gas in the activator, generate the novel functional group of hydrogeneous or nitrogen with the oxidisability active site generation reduction reaction on surface in the carbon, these functional groups are to improving the absorption property of gac, especially to polar gas such as H
2S, SO
2, formaldehyde etc. absorption property, bringing into play important effect.
Because reactivation process is carried out under the redox condition, changed the surface properties of gac, thereby charcoal absorption performance and physicals have been improved, activated carbon adsorptive capacity that obtains with method of the present invention and sweetening power obtain gac than ordinary method and have all improved 10%-30%, product even aperture distribution degree improves, the gas delivery ability strengthens, and product yield has improved 2%-15%.
Utilize method of the present invention can production flue gas desulfurization gac (Jiao), gas purification with desulphurized aetivated carbon, gas sweetening and isolating active charcoal, water treatment with gac, solvent recuperation with gac, automobile with gac and gas delivery gac with various kinds such as gacs.The main absorption property of gac and the physicals of preparation are as shown in table 2, and the activated carbon product with this performance is a kind of top-grade active carbon product that the conventional physical activation method is difficult to obtain.
Table 2, utilize the performance of the gac of oxidation-reduction quality mixed gas activation preparation
| The title index |
| Tetrachloro charcoal adsorptive value % 80-110 Yamamoto Methylene Blue ZF % 220-300 iodine number mg/g 650-1000 SO 2Loading capacity mg/g＞90 specific surface m 2/ g 1000-1600 bulk density g/L 450-650 intensity %＞98 |
Description of drawings
Fig. 1 produces the process flow sheet of gac for the conventional physical activation method.
Embodiment
Embodiment 1:
Choose bituminous coal and be crushed to 2-6mm, at first carry out charing, warm 650 ℃ eventually of charings with ordinary method; Activation then, 800 ℃ of activation temperatures, pressure is 3MPa, activator is the gas mixture of water vapor and ammonia, ethene, the ammonia of equal volume and ethylene gas account for 20% in gas mixture, aeration time is 10 hours, obtains activated carbon product, the activation yield is about 40%, and the activated carbon product performance of preparation is as follows:
Iodine number mg/g 800-1100
Yamamoto Methylene Blue ZF mg/g 160-260
Tetrachloro charcoal % 40%-100%
SO
2Loading capacity mg/g＞100
Oxygen nitrogen separation factor 12-16
Specific surface m
2/ g 800-1000
Bulk density g/L 400-500
Intensity % 90-98%
Embodiment 2:
Choose the broken abrasive dust of brown coal, it is molded to add the tar stirring extruding, warm 650 ℃ eventually of charings then, charing; Charing is postactivated, 800 ℃ of activation temperatures, under normal pressure, carry out, the gas mixture of activated media water vapor and hydrogen, ammonia, the volume parts ratio of hydrogen and ammonia is 1: 3, they account for 20% of gas mixture, the ratio of water vapor and charcoal is 12: 1, and aeration time is 50 hours, obtains activated carbon product, activation yield 50%, the activated carbon product performance of preparation is as follows:
Iodine number mg/g 750-1000
Yamamoto Methylene Blue ZF mg/g 240-230
Tetrachloro charcoal % 40%-60%
H2S adsorptive capacity % 40%
Oxygen nitrogen separation factor 14-24
Specific surface m
2/ g 600-1000
Bulk density g/L 400-500
Intensity % 92-98%
Embodiment 3:
Choose coconut husk, be crushed to 4-20mm, warm 550 ℃ eventually of ordinary method charings, charing; Charing is postactivated, 800 ℃ of activation temperatures, under normal pressure, carry out, activated media is the gas mixture of water vapor and acetylene, ammonia, and the gas mixture of equal-volume acetylene, ammonia is 1: 9 with the volume parts of water vapor ratio, and the ratio of water vapor and charcoal is 10: 1, aeration time is 70 hours, obtain activated carbon product, activation yield 45%, the activated carbon product performance of preparation is as follows:
Iodine number mg/g 850-1000
Yamamoto Methylene Blue ZF mg/g 160-200
Tetrachloro charcoal % 40%-80%
Oxygen nitrogen separation factor 16-25
Specific surface m
2/ g 700-1000
Bulk density g/L 440-600
Intensity % 94-99%
Claims (9)
1, a kind of preparation process of active carbon is that contenting carbon material is obtained gac through charing and after activating, and it is characterized in that: the activator in the described reactivation process is made up of oxidation and reducing gas.
2, preparation process of active carbon according to claim 1 is characterized in that: the volume parts ratio that described oxidizing gas and reducing gas account for activator is respectively 99%-60% and 1%-40%.
3, preparation process of active carbon according to claim 1, it is characterized in that: described oxidizing gas is selected from one or more in water vapour, carbonic acid gas, flue gas and the oxygen.
4, preparation process of active carbon according to claim 1, it is characterized in that: described reducing gas is selected from one or more in ammonia, hydrogen, methylamine, ethene and the acetylene.
5, according to claim 1 or 2 or 3 or 4 described preparation process of active carbon, it is characterized in that: described oxidation and reducing gas act on after mixing simultaneously.
6, according to claim 1 or 2 or 3 or 4 described preparation process of active carbon, it is characterized in that: described reactivation process is to feed oxidizing gas earlier, feeds reducing gas again.
7, according to claim 1 or 2 or 3 or 4 described preparation process of active carbon, it is characterized in that: the temperature of described reactivation process is 650-1000 ℃.
8, according to claim 1 or 2 or 3 or 4 described preparation process of active carbon, it is characterized in that: described reactivation process is to carry out under the condition of pressurization, and institute's plus-pressure is 0.3-5MPa.
9, according to claim 1 or 2 or 3 or 4 described preparation process of active carbon, it is characterized in that: described contenting carbon material is one or more in bituminous coal, hard coal, brown coal, timber and the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021460043A CN1202004C (en) | 2002-10-23 | 2002-10-23 | Process for preparing active carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021460043A CN1202004C (en) | 2002-10-23 | 2002-10-23 | Process for preparing active carbon |
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| Publication Number | Publication Date |
|---|---|
| CN1491886A true CN1491886A (en) | 2004-04-28 |
| CN1202004C CN1202004C (en) | 2005-05-18 |
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|---|---|---|---|
| CNB021460043A Expired - Fee Related CN1202004C (en) | 2002-10-23 | 2002-10-23 | Process for preparing active carbon |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304285C (en) * | 2004-05-26 | 2007-03-14 | 王浦林 | Process for preparing polyporous charcoal and device therefor |
| CN101993067A (en) * | 2010-10-19 | 2011-03-30 | 煤炭科学研究总院 | Sulfur, nitreand mercury removing active carbon and preparation method thereof |
| CN105788876A (en) * | 2016-03-09 | 2016-07-20 | 湘潭大学 | Process for preparing biomass porous nitrogen-doped carbon material and fabrication method of supercapacitor electrode |
| CN107117612A (en) * | 2016-02-25 | 2017-09-01 | 现代自动车株式会社 | Activated carbon and its manufacture method |
| CN109678154A (en) * | 2019-01-09 | 2019-04-26 | 新奥石墨烯技术有限公司 | Nitrogen-doped porous carbon material and preparation method thereof, cathode, battery and supercapacitor |
| CN110127691A (en) * | 2018-02-02 | 2019-08-16 | 现代自动车株式会社 | Method for manufacturing active carbon |
-
2002
- 2002-10-23 CN CNB021460043A patent/CN1202004C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304285C (en) * | 2004-05-26 | 2007-03-14 | 王浦林 | Process for preparing polyporous charcoal and device therefor |
| CN101993067A (en) * | 2010-10-19 | 2011-03-30 | 煤炭科学研究总院 | Sulfur, nitreand mercury removing active carbon and preparation method thereof |
| CN107117612A (en) * | 2016-02-25 | 2017-09-01 | 现代自动车株式会社 | Activated carbon and its manufacture method |
| CN105788876A (en) * | 2016-03-09 | 2016-07-20 | 湘潭大学 | Process for preparing biomass porous nitrogen-doped carbon material and fabrication method of supercapacitor electrode |
| CN110127691A (en) * | 2018-02-02 | 2019-08-16 | 现代自动车株式会社 | Method for manufacturing active carbon |
| CN109678154A (en) * | 2019-01-09 | 2019-04-26 | 新奥石墨烯技术有限公司 | Nitrogen-doped porous carbon material and preparation method thereof, cathode, battery and supercapacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1202004C (en) | 2005-05-18 |
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