CN1068913C - Preparation of active carbon fiber with high desulfurization rate - Google Patents
Preparation of active carbon fiber with high desulfurization rate Download PDFInfo
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- CN1068913C CN1068913C CN98123524A CN98123524A CN1068913C CN 1068913 C CN1068913 C CN 1068913C CN 98123524 A CN98123524 A CN 98123524A CN 98123524 A CN98123524 A CN 98123524A CN 1068913 C CN1068913 C CN 1068913C
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- acf
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Abstract
The present invention relates to a preparation method for ACF with high desulfuring activity, which comprises: carbon fibers or oxidized fibers are put into an activation furnace, then heated to 750 to 950 DEG C under the protection of an N2 atmosphere and then activated with ammonia water (3.5 to 10.5 m) for 1 hr and finally cooled naturally under the protection of the N2 atmosphere to obtain the ACF with high desulfuring activity. The preparation method has the advantages of simple operation, low cost and no need of modification by post treatment; therefore, the preparation method is favourable for practical applications.
Description
The invention belongs to the preparation method of a kind of activated carbon fiber (ACF), relate in particular to a kind of preparation method with activated carbon fiber of high desulfurization rate.
SO in the coal combustion tail gas
2Can adopt ACF is H with its catalytic oxidation
2SO
4And remove, but the ACF's that makes by traditional activation method is desulphurizing activated lower.According to document (Energy andfuel, 1994,8,1337-1340) report, commercially available polyacrylonitrile-radical ACF or the asphaltic base ACF of 0.5g are placed in the fixed bed reactors simulated flue gas (SO
2: 1000ppm, O
2: 5vol%, H
2When O10vol%) passing the ACF bed with the flow velocity of 100ml/min under 30 ℃, with the kind of employed ACF and the difference of specific area, it is desulphurizing activated different.Specific area is respectively 480,710 and 1150m
2/ asphaltic base ACFOG-5A, OG-10A and OG-20A remove SO
2Css be respectively 38%, 45% and 38%, and specific area is 446,887 and 1141m
2Polyacrylonitrile-radical ACF FE-100, FE-200 and the FE-300 of/g remove SO
2Css be respectively 22%, 20% and 15%.ACF removes SO
2Css low more, it is desulphurizing activated high more.This shows that the highest desulphurizing activated even FE-300 has shown, its desulfurization degree also only is 85%[desulfurization degree (%)=1-Css (%)].Therefore commercially available ACF often adopts the post processing modification to improve its desulfurization degree, will make complicated operationization and ACF is carried out the post processing modification, improves the production cost of ACF, the expansion of restriction ACF range of application.
The purpose of this invention is to provide a kind of simple to operate, cost is low, do not need any post processing modification promptly to have the preparation method of the ACF of high desulfurization activity.
The object of the present invention is achieved like this: the steam activation agent traditional with aqueous ammonia to replace activates the ACF that has high desulfurization activity with preparation to charcoal fiber or oxidized fibre.
Its method comprises the steps:
(1) charcoal fiber or oxidized fibre are placed in the activation furnace, at N
2Be warmed up to 750-950 ℃ under the protection;
(2) with N
2Switch to activator and under said temperature, activate 1h;
(3) activator is switched to N
2The back is cooled off the ACF that promptly makes high desulfurization activity naturally.
It is characterized in that: described activator is to be vaporized by the ammoniacal liquor of 3.5M-10.5M to form.
Desulfurization condition used in the present invention is as follows: simulated flue gas consists of SO
2: 1000ppm; O
2: 5vol%, H
2O:10vol%; Reaction temperature is 30 ℃; Contact time W/F (ACF weight W: 0.1-0.5g wherein; Gas flow rate F:100ml/min) is 1.0-5.0 * 10
-3G.min/ml.Desulfurization degree is greater than 90%.
The present invention has following advantage:
1. simple, convenient.
2. by changing the concentration of ammoniacal liquor, can make the different ACF of specific area.
3. different types of charcoal fiber or oxidized fibre all have high desulphurizing activated through the ACF of this method activation preparation.
Embodiments of the invention are as follows:
Embodiment 1
Pitch based carbon fiber is behind the ammoniacal liquor activation 1h with 10.5M under 890 ℃, and the specific area of prepared ACF is 463m
2/ g, its SO
2Removal efficiency is 100%.(SO
2Remove condition: 30 ℃ of reaction temperatures, ACF weight 0.5g, gas flow rate 100ml/min, simulated flue gas consists of SO
2: 1000ppm, O
2: 5vol%, H
2O:10volT).
Comparative Examples 1
Pitch based carbon fiber is 480m through the specific area of the OG-5A that steam activation makes
2/ g, its SO
2Removal efficiency is 62%.(SO
2The condition that removes is with embodiment 1).
Embodiment 2
Pitch based carbon fiber is after using 8.5M ammoniacal liquor activation 1h under 850 ℃, the specific area of prepared ACF is 725m
2/ g, its SO
2Removal efficiency is 100% (SO
2The condition that removes is with embodiment 1).
Comparative Examples 2
The specific area that makes through steam activation is 710m
2The SO of/g asphaltic base ACF OG-10A
2Removal efficiency is 55% (SO
2The condition that removes is with embodiment 1).
Embodiment 3
Pitch based carbon fiber is after using 7M ammoniacal liquor activation 1h under 890 ℃, the specific area of prepared ACF is 1035m
2/ g, its SO
2Removal efficiency is 100% (SO
2The condition that removes is with embodiment 1).
Comparative Examples 3
The specific area that makes through steam activation is 1150m
2The SO of/g asphaltic base ACF OG-20A
2Removal efficiency is 62% (SO
2The condition that removes is with embodiment 1).
Embodiment 4
Pitch based carbon fiber is after using 7M ammoniacal liquor activation 1h under 890 ℃, the specific area of prepared ACF is 1035m
2/ g, its SO
2Removal efficiency is 94% (SO
2The condition that removes is reduced to the 0.25g except that ACF weight, and all the other are with embodiment 1).
Embodiment 5
900 ℃ of pitch based carbon fibers are following to behind the 3.5M ammoniacal liquor activation 1h, and the specific area of prepared ACF is 1520m
2/ g, its SO
2Removal efficiency is 100% (SO
2The condition that removes is with embodiment 4).
Embodiment 6
900 ℃ of pitch based carbon fibers are following to behind the 3.5M ammoniacal liquor activation 1h, and the specific area of prepared ACF is 1520m
2/ g, its SO
2Removal efficiency is 90% (SO
2The condition that removes is reduced to the 0.1g except that ACF weight, and all the other are with embodiment 1).
Embodiment 7
The polyacrylonitrile oxidation fiber is after using 7M ammoniacal liquor activation 1h under 820 ℃, the specific area of prepared ACF is 463m
2/ g, its SO
2Removal efficiency is 93% (SO
2The condition that removes is with embodiment 4).
Comparative Examples 7
The specific area that makes through steam activation is 446m
2The SO of the polyacrylonitrile-radical ACFFE-100 of/g
2Removal efficiency is 78% (SO
2The condition that removes is with embodiment 4).
Embodiment 8
The polyacrylonitrile oxidation fiber is after using 3.5M ammoniacal liquor activation 1h under 800 ℃, the specific area of prepared ACF is 825m
2/ g, its SO
2Removal efficiency is 100% (SO
2The condition that removes is with embodiment 4).
Comparative Examples 8
The specific area that makes through steam activation is 887m
2The SO of the polyacrylonitrile-radical ACFFE-200 of/g
2Removal efficiency is 80% (SO
2The condition that removes is with embodiment 4).
Embodiment 9
The polyacrylonitrile oxidation fiber is after using 4M ammoniacal liquor activation 1h under 850 ℃, the specific area of prepared ACF is 1079m
2/ g, its SO
2Removal efficiency is 100% (SO
2The condition that removes is with embodiment 4).
Comparative Examples 9
Specific area is 1141m
2The polyacrylonitrile-radical ACFFE-300 of/g is after 800 ℃ of heat treatment, and it is to SO
2Removal efficiency is 85% (SO
2The condition that removes with embodiment 4).
Embodiment 10
Rayon-based carbon fiber is after using 4.7M ammoniacal liquor activation 1h under 900 ℃, the specific area of prepared ACF is 1600m
2/ g, its SO
2Removal efficiency is 100% (SO
2The condition that removes is with embodiment 4).
Embodiment 11
Rayon-based carbon fiber is after using 9.4M ammoniacal liquor activation 1h under 800 ℃, the specific area of prepared ACF is 1030m
2/ g, its SO
2Removal efficiency is 96% (SO
2The condition that removes is with embodiment 4).
Claims (1)
1. the preparation method with activated carbon fiber of high desulfurization activity comprises the steps:
(1) charcoal fiber or fusion-free fibre are placed in the activation furnace, at N
2Be warmed up to 750-950 ℃ under the protection;
(2) with N
2Switch to activator and under said temperature, activate 1h;
(3) change activator into N
2The back is cooled off the activated carbon fiber that promptly makes high desulfurization activity naturally; It is characterized in that: described activator is to be vaporized by the ammoniacal liquor of 3.5M-10.5M to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98123524A CN1068913C (en) | 1998-10-07 | 1998-10-07 | Preparation of active carbon fiber with high desulfurization rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98123524A CN1068913C (en) | 1998-10-07 | 1998-10-07 | Preparation of active carbon fiber with high desulfurization rate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1250117A CN1250117A (en) | 2000-04-12 |
| CN1068913C true CN1068913C (en) | 2001-07-25 |
Family
ID=5228225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98123524A Expired - Fee Related CN1068913C (en) | 1998-10-07 | 1998-10-07 | Preparation of active carbon fiber with high desulfurization rate |
Country Status (1)
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10028654A1 (en) * | 2000-06-09 | 2001-12-20 | Sandler Helmut Helsa Werke | Reactivation of activated charcoal, used in thin film filter for air purification by adsorption and catalytic reaction of sulfur dioxide, involves heating to activation temperature in gas containing ammonia, carbon dioxide and/or steam |
| CN101306296B (en) * | 2008-07-14 | 2011-06-22 | 新源动力股份有限公司 | Method for eliminating sulfur dioxide in fuel cell oxidant |
| CN103469370B (en) * | 2013-08-20 | 2016-08-24 | 蓝星（北京）特种纤维技术研发中心有限公司 | A kind of nitrogenous activated carbon fiber and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5270121A (en) * | 1975-12-04 | 1977-06-10 | Toyobo Co Ltd | Activated carbon fibers |
| CN1113978A (en) * | 1994-06-06 | 1995-12-27 | 杜海峰 | Producing method for active carbon fiber |
| CN1114287A (en) * | 1994-06-04 | 1996-01-03 | 王吉祥 | Method for continuously producing active carbon fibre cloth and device thereof |
| WO1997001388A1 (en) * | 1995-06-28 | 1997-01-16 | Mitsubishi Jukogyo Kabushiki Kaisha | Flue-gas treatment system |
-
1998
- 1998-10-07 CN CN98123524A patent/CN1068913C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5270121A (en) * | 1975-12-04 | 1977-06-10 | Toyobo Co Ltd | Activated carbon fibers |
| CN1114287A (en) * | 1994-06-04 | 1996-01-03 | 王吉祥 | Method for continuously producing active carbon fibre cloth and device thereof |
| CN1113978A (en) * | 1994-06-06 | 1995-12-27 | 杜海峰 | Producing method for active carbon fiber |
| WO1997001388A1 (en) * | 1995-06-28 | 1997-01-16 | Mitsubishi Jukogyo Kabushiki Kaisha | Flue-gas treatment system |
| CN1155852A (en) * | 1995-06-28 | 1997-07-30 | 三菱重工业株式会社 | Flue-gas treatment system |
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|---|---|
| CN1250117A (en) | 2000-04-12 |
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