CN117303360A - Non-tar active coke and preparation method thereof - Google Patents
Non-tar active coke and preparation method thereof Download PDFInfo
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- CN117303360A CN117303360A CN202311230883.0A CN202311230883A CN117303360A CN 117303360 A CN117303360 A CN 117303360A CN 202311230883 A CN202311230883 A CN 202311230883A CN 117303360 A CN117303360 A CN 117303360A
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- 239000000571 coke Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000003245 coal Substances 0.000 claims abstract description 47
- 239000000843 powder Substances 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 15
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000010426 asphalt Substances 0.000 claims abstract description 15
- 239000002802 bituminous coal Substances 0.000 claims abstract description 15
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 15
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 15
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 15
- 239000003365 glass fiber Substances 0.000 claims abstract description 15
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000005011 phenolic resin Substances 0.000 claims abstract description 14
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 14
- 239000002699 waste material Substances 0.000 claims abstract description 14
- 238000004898 kneading Methods 0.000 claims abstract description 9
- 239000007864 aqueous solution Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 229920000136 polysorbate Polymers 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 230000003213 activating effect Effects 0.000 claims abstract description 4
- 238000010000 carbonizing Methods 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 3
- 238000003763 carbonization Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 27
- 238000001994 activation Methods 0.000 claims description 26
- 230000004913 activation Effects 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000004939 coking Methods 0.000 claims description 14
- 239000000243 solution Substances 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 4
- 238000006477 desulfuration reaction Methods 0.000 abstract description 4
- 230000023556 desulfurization Effects 0.000 abstract description 4
- 239000003546 flue gas Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 229920000642 polymer Polymers 0.000 abstract description 3
- 230000001172 regenerating effect Effects 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 13
- 229910052757 nitrogen Inorganic materials 0.000 description 12
- 239000002245 particle Substances 0.000 description 10
- 239000008187 granular material Substances 0.000 description 7
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 6
- 229920000053 polysorbate 80 Polymers 0.000 description 6
- 238000007873 sieving Methods 0.000 description 5
- 238000007605 air drying Methods 0.000 description 4
- 239000005539 carbonized material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C01B32/336—Preparation characterised by gaseous activating agents
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention belongs to the technical field of flue gas treatment, and particularly provides a preparation method of non-tar active coke, which comprises the following steps: (1) Sequentially adding phenolic resin powder, carboxymethyl cellulose powder and short glass fibers into asphalt in a stirring state to obtain a mixture; (2) Grinding the bituminous coal and the active Jiao Mosun waste coke, and mixing into pulverized coal; (3) Adding pulverized coal into a kneader, starting stirring, adding a mixture into the kneader, and then adding a Tween aqueous solution for kneading to obtain a kneaded material; (4) Granulating and drying the kneaded material, then carbonizing and activating, and cooling to obtain the non-tar active coke. The preparation method adopts the undersize waste coke of the vibrating screen behind the regenerating tower of the desulfurization and denitrification system as the main raw material to replace part of coal, thereby reducing the preparation cost of the active coke. And a stepwise mixing mode is adopted, and tar is replaced by matching a series of polymer organic matters with different functional emphasis points, so that the environmental friendliness of the preparation process is improved.
Description
Technical Field
The invention belongs to the technical field of flue gas treatment, and particularly relates to non-tar active coke and a preparation method thereof.
Background
The active coke is carbon particles with a porous structure, rich surface functional groups and certain strength, the characteristics of the porous and rich surface functional groups enable the active coke to have the capability of absorbing sulfur dioxide and catalyzing nitrogen oxides, the certain strength ensures that the active coke is suitable for a moving bed, an active coke desulfurization and denitrification method with absorption/desorption cycle as a main characteristic is widely applied to the treatment of steel sintering flue gas, and the performance of an active coke material determines the flue gas purifying capability of a desulfurization and denitrification system.
The active coke is prepared by using various caking coals as raw materials, adding binders such as tar, asphalt and the like, granulating, carbonizing and activating. Because a large amount of coal is consumed, and tar with certain toxicity and environmental pollution is used, the preparation of active coke still has the problems of high cost and environmental friendliness.
Disclosure of Invention
The invention aims to solve the problems of high preparation cost and environmental pollution of active coke in the prior art.
Therefore, the invention provides a preparation method of non-tar active coke, which comprises the following steps:
(1) Adding phenolic resin powder, carboxymethyl cellulose powder and short glass fibers into asphalt in a stirring state to obtain a mixture;
(2) Grinding the bituminous coal and the active Jiao Mosun waste coke, and mixing into pulverized coal;
(3) Adding pulverized coal into a kneader, starting stirring, adding a mixture into the kneader, and then adding a Tween aqueous solution for kneading to obtain a kneaded material;
(4) Granulating and drying the kneaded material, then carbonizing and activating, and cooling to obtain the non-tar active coke.
Specifically, the phenolic resin powder, the carboxymethyl cellulose powder and the short glass fiber in the step (1) are added at intervals of 1min.
Specifically, the mass ratio of asphalt in the mixture in the step (1) is 60-70%; the mass ratio of the phenolic resin powder to the carboxymethyl cellulose powder to the short glass fiber is (3-4): 2:2.
specifically, the mass ratio of the active Jiao Mosun waste coke in the coal powder in the step (2) is 40-60%; the bituminous coal comprises coking coal, and the mass ratio of the coking coal in the bituminous coal is 1:4-2:3.
Specifically, the bituminous coal in the step (2) further comprises one or more of fat coal, 1/3 coking coal and lean coal.
Specifically, the mass ratio of the mixture to the pulverized coal in the step (3) is 1:15-1:25.
Specifically, tween in the tween-water solution in the step (3) accounts for 1-5% of the water mass; the mass ratio of the warm water solution to the pulverized coal is 1:10-1:20.
Specifically, in the step (4), the carbonization temperature is 500-600 ℃ and the carbonization time is 1-2h; the activation temperature is 700-900 ℃ and the activation time is 0.3-0.45h.
Specifically, in the step (4), the carbonization process adopts inert gas protection, and the activation process adopts steam/inert gas protection.
In addition, the invention also provides a non-tar type active coke product prepared by the method.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the preparation method of the non-tar active coke provided by the invention adopts the undersize waste coke of the vibrating screen behind the regenerating tower of the desulfurization and denitrification system as a main raw material to replace part of coal types, so that the preparation cost of the active coke is reduced. And by matching a series of polymer organic matters with different functional emphasis, the tar is replaced by the polymer organic matter combination in a stepwise mixing mode, and the environmental friendliness of the preparation process is improved. Wherein, the carboxymethyl cellulose powder plays a role in providing cold strength of raw materials and strengthening the occlusion force among particles in the kneading and granulating process; during carbonization, the phenolic resin plays a role in decomposing to provide enough molten colloid and promoting the production of a carbon skeleton; the short glass fiber not only provides cold strength of raw materials in the kneading and granulating process, but also plays a certain role in bonding through melting in the carbonization process.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in the following examples, and it is obvious that the described examples are only some examples of the present invention, but not all examples. Although representative embodiments of the present invention have been described in detail, those skilled in the art to which the invention pertains will appreciate that various modifications and changes can be made without departing from the scope of the invention. Accordingly, the scope of the invention should not be limited to the embodiments, but should be defined by the appended claims and equivalents thereof.
The invention provides a preparation method of non-tar active coke, which comprises the following steps:
(1) Adding sieved (more than 200 meshes) asphalt powder into a stirring kettle, starting stirring, sequentially adding phenolic resin powder, carboxymethyl cellulose powder and short glass fibers into asphalt in a stirring state, and stirring for 10min after all raw materials are added, taking out the mixture, sieving, and using the part of the mixture with more than 200 meshes; the mass ratio of asphalt in the mixture is 60-70%; the mass ratio of the phenolic resin powder to the carboxymethyl cellulose powder to the short glass fiber is (3-4): 2:2.
(2) Grinding bituminous coal and active Jiao Mosun waste coke into powder by a coal mill respectively, screening more than 200 meshes, and mixing into pulverized coal; the mass ratio of the active Jiao Mosun waste coke in the coal powder is 40-60%; the bituminous coal comprises coking coal, and the mass ratio of the coking coal in the bituminous coal is 1:4-2:3; the bituminous coal also comprises one or more of fat coal, 1/3 coking coal and lean coal.
(3) Adding pulverized coal into a kneader, starting stirring, and adding a mixture into the kneader, wherein the mass ratio of the mixture to the pulverized coal is 1:15-1:25. Adding tween water solution immediately after the mixture is added, and kneading for at least 5min to obtain a kneaded material; tween in the tween 80 water solution accounts for 1-5% of the water mass; the mass ratio of the warm water solution to the pulverized coal is 1:10-1:20.
(4) The kneadate is granulated and fed into a granulator to carry out granulation, preferably cylindrical granules having a length of 8 to 12 mm. And (3) naturally air-drying the particles in a dry and cool environment until the moisture is lower than 15%, then sending the particles into a carbonization and activation integrated device for carbonization and activation, and cooling to obtain the non-tar type active coke.
The carbonization and activation device has the program temperature control, the carbonization program temperature is 500-600 ℃, the carbonization time is 1-2h, the carbonization process adopts inert gas protection, preferably nitrogen, and the flow is 1.0 liter/min. The activation procedure is carried out at 700-900 ℃ for 0.3-0.45h, the activation process adopts the protection of water vapor/inert gas, preferably water vapor/nitrogen, the flow rate of the water vapor is 1.0-5.0ml/min/100g carbonized material, and the flow rate of the nitrogen is 0.5 liter/min.
The effect of the method for producing a non-tar type active coke of the present invention is examined by the following specific examples.
Example 1:
the embodiment provides a preparation method of non-tar active coke, which comprises the following steps:
(1) Adding 400g of asphalt powder which is sieved (more than 200 meshes) into a stirring kettle, starting stirring, sequentially adding 75g of phenolic resin powder, 50g of carboxymethyl cellulose powder and 50g of short glass fibers into asphalt at intervals of 1min under a stirring state, stirring for 10min after all raw materials are added, taking out the mixture, sieving the mixture with a sieve, and sieving out more than 200 meshes for later use.
(2) The coking coal, lean coal and active Jiao Mosun waste coke are respectively ground into powder by a coal mill, and the powder is screened to more than 200 meshes.
(3) 600g of ground coking coal, 1400g of bituminous coal and 2400g of waste coke with activity Jiao Mosun are taken and poured into a kneader to be stirred for 1min. Adding a mixture into a kneader, immediately adding an aqueous solution containing 5wt.% of Tween 80 into the kneader under the condition of continuous stirring of the kneader after the mixture is added, and kneading for 10min to obtain a kneaded material; the Tween 80 aqueous solution was 440g.
(4) Granulating the kneaded material, and adding the granulated material into a granulator for granulating to obtain cylindrical granules with the length of 8-12 mm. And (3) naturally air-drying the particles in a dry and cool environment until the moisture is lower than 15%, then sending the particles into a carbonization and activation integrated device for carbonization and activation, and cooling to obtain the non-tar type active coke.
The carbonization temperature is 560 ℃, the carbonization time is 1h, the carbonization process adopts nitrogen protection, and the flow is 1.0 liter/min. The activation temperature is 760 ℃, the activation time is 30min, the activation process adopts the protection of water vapor/nitrogen, the flow rate of the water vapor is 3.0ml/min/100g carbonized material, and the flow rate of the nitrogen is 0.5 liter/min.
The non-tar type active coke prepared in this example was tested by the method of GB/T30202.3-2013, and the results are shown in Table 1.
Example 2:
the embodiment provides a preparation method of non-tar active coke, which comprises the following steps:
(1) Adding 420g of asphalt powder which is sieved (more than 200 meshes) into a stirring kettle, starting stirring, sequentially adding 140g of phenolic resin powder, 70g of carboxymethyl cellulose powder and 70g of short glass fibers into asphalt at intervals of 1min under a stirring state, stirring for 10min after all raw materials are added, taking out the mixture, sieving the mixture with a sieve, and sieving out more than 200 meshes for standby.
(2) The coking coal, lean coal and active Jiao Mosun waste coke are respectively ground into powder by a coal mill, and the powder is screened to more than 200 meshes.
(3) Taking 1680g of ground coking coal, 2520g of lean coal and 6300g of waste coke with activity Jiao Mosun, pouring into a kneader and stirring for 2min. Adding a mixture into a kneader, immediately adding an aqueous solution containing 5wt.% of Tween 80 into the kneader under the condition of continuous stirring of the kneader after the mixture is added, and kneading for 10min to obtain a kneaded material; the mass ratio of the Tween 80 aqueous solution to the pulverized coal is 1:20.
(4) Granulating the kneaded material, and adding the granulated material into a granulator for granulating to obtain cylindrical granules with the length of 8-12 mm. And (3) naturally air-drying the particles in a dry and cool environment until the moisture is lower than 15%, then sending the particles into a carbonization and activation integrated device for carbonization and activation, and cooling to obtain the non-tar type active coke.
The carbonization temperature is 560 ℃, the carbonization time is 1h, the carbonization process adopts nitrogen protection, and the flow is 1.0 liter/min. The activation temperature is 760 ℃, the activation time is 30min, the activation process adopts the protection of water vapor/nitrogen, the flow rate of the water vapor is 3.0ml/min/100g carbonized material, and the flow rate of the nitrogen is 0.5 liter/min.
The non-tar type active coke prepared in this example was tested by the method of GB/T30202.3-2013, and the results are shown in Table 1.
Comparative example 1:
the comparative example provides an activated coke prepared by the following steps:
(1) 400g of asphalt powder, 75g of phenolic resin powder, 50g of carboxymethyl cellulose powder, 50g of short glass fiber, 600g of coking coal, 1400g of bituminous coal and 2400g of active Jiao Mosun waste coke are respectively weighed, sieved by a 200-mesh sieve and stirred for 1min.
(2) And adding 440g of an aqueous solution containing 5wt.% of Tween 80 into a kneader at the same time, stirring and kneading for 25min to obtain a kneaded material.
(3) Granulating the kneaded material, and adding the granulated material into a granulator for granulating to obtain cylindrical granules with the length of 8-12 mm. And (3) naturally air-drying the particles in a dry and cool environment until the moisture is lower than 15%, then sending the particles into a carbonization and activation integrated device for carbonization and activation, and cooling to obtain the non-tar type active coke.
The carbonization temperature is 560 ℃, the carbonization time is 1h, the carbonization process adopts nitrogen protection, and the flow is 1.0 liter/min. The activation temperature is 760 ℃, the activation time is 30min, the activation process adopts the protection of water vapor/nitrogen, the flow rate of the water vapor is 3.0ml/min/100g carbonized material, and the flow rate of the nitrogen is 0.5 liter/min.
The active coke prepared in this comparative example was tested by the method of GB/T30202.3-2013, and the results are shown in Table 1.
Comparative example 2:
the comparative example provides an activated coke, the preparation method of which is different from that of example 1 in that the step (1) is: 400g of asphalt powder, 75g of phenolic resin powder, 50g of carboxymethyl cellulose powder and 50g of short glass fibers are respectively weighed, screened by a 200-mesh sieve, and added into a stirring kettle for stirring for 13min.
The char performance prepared in this comparative example was tested by the method of GB/T30202.3-2013, and the results are shown in Table 1.
Comparative example 3:
comparative example this comparative example provides an activated coke which is prepared by a process differing from that of example 1 in that step (1) is to add 87g of carboxymethyl cellulose powder and 87g of short glass fiber to pitch in sequence.
The char performance prepared in this comparative example was tested by the method of GB/T30202.3-2013, and the results are shown in Table 1.
TABLE 1 active Coke Performance test results
| Wear resistance | Compressive Strength | |
| First grade product | ≥97％ | ≥40Kgf |
| Qualified product | ≥94％ | ≥30Kgf |
| Example 1 | 96.1％ | 44Kgf |
| Example 2 | 97.8％ | 48Kgf |
| Comparative example 1 | 95.7％ | 44Kgf |
| Comparative example 2 | 95.1％ | 43Kgf |
| Comparative example 3 | 94.4％ | 42Kgf |
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention.
Claims (10)
1. The preparation method of the non-tar active coke is characterized by comprising the following steps of:
(1) Adding phenolic resin powder, carboxymethyl cellulose powder and short glass fibers into asphalt in a stirring state to obtain a mixture;
(2) Grinding the bituminous coal and the active Jiao Mosun waste coke, and mixing into pulverized coal;
(3) Adding pulverized coal into a kneader, starting stirring, adding a mixture into the kneader, and then adding a Tween aqueous solution for kneading to obtain a kneaded material;
(4) Granulating and drying the kneaded material, then carbonizing and activating, and cooling to obtain the non-tar active coke.
2. The method for preparing non-tar type active coke according to claim 1, wherein: and (3) adding phenolic resin powder, carboxymethyl cellulose powder and short glass fibers in the step (1) for 1min.
3. The method for preparing non-tar type active coke according to claim 1, wherein: the mass ratio of asphalt in the mixture of the step (1) is 60-70%; the mass ratio of the phenolic resin powder to the carboxymethyl cellulose powder to the short glass fiber is (3-4): 2:2.
4. the method for preparing non-tar type active coke according to claim 1, wherein: the mass ratio of the active Jiao Mosun waste coke in the coal powder in the step (2) is 40-60%; the bituminous coal comprises coking coal, and the mass ratio of the coking coal in the bituminous coal is 1:4-2:3.
5. The method for preparing non-tar type active coke according to claim 4, wherein: the bituminous coal in the step (2) also comprises one or more of fat coal, 1/3 coking coal and lean coal.
6. The method for preparing non-tar type active coke according to claim 1, wherein: the mass ratio of the mixture to the pulverized coal in the step (3) is 1:15-1:25.
7. The method for preparing non-tar type active coke according to claim 1, wherein: the tween in the tween-water solution in the step (3) accounts for 1-5% of the water mass; the mass ratio of the warm water solution to the pulverized coal is 1:10-1:20.
8. The method for preparing non-tar type active coke according to claim 1, wherein: the carbonization temperature in the step (4) is 500-600 ℃, and the carbonization time is 1-2h; the activation temperature is 700-900 ℃ and the activation time is 0.3-0.45h.
9. The method for preparing non-tar type active coke according to claim 1, wherein: in the step (4), inert gas is adopted for protection in the carbonization process, and steam/inert gas is adopted for protection in the activation process.
10. A non-tar type active coke product prepared by the method of any one of claims 1 to 9.
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