CN101708841A - Method for preparing activated carbon by utilizing waste tire rubber - Google Patents
Method for preparing activated carbon by utilizing waste tire rubber Download PDFInfo
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- CN101708841A CN101708841A CN200910228529A CN200910228529A CN101708841A CN 101708841 A CN101708841 A CN 101708841A CN 200910228529 A CN200910228529 A CN 200910228529A CN 200910228529 A CN200910228529 A CN 200910228529A CN 101708841 A CN101708841 A CN 101708841A
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- activated carbon
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Abstract
The invention discloses a method for preparing activated carbon by utilizing waste tire rubber, which separates the carbonization and activation processes in a preparation process, namely first performs carbonization and then activation. The method comprises the following steps of: 1) crushing the waste tire rubber into particles, placing the particles into reaction equipment, and carbonizing the particles in nitrogen atmosphere at a high temperature; 2) mixing the carbide and an activating agent, namely potassium hydroxide, grinding the mixture, and then performing high-temperature activation treatment in nitrogen atmosphere; and 3) cooling an activation product to room temperature in nitrogen atmosphere, acid-cleaning the activation product, then repeatedly washing the activation product to be neutral by using high-purity water, and drying the activation product to obtain a final activated carbon product. The method has the advantages of simple process, energy conservation, less environmental pollution, and low production cost; the prepared activated carbon has stable property and developed mesopores, and is particularly suitable for absorbing macromolecular compounds that activated carbon with ordinary coal quality fails to absorb and suitable to be used as a supporting material of microorganisms and a catalysts for preparing compound activated carbon; and the method fulfills the aim of changing waste into valuable, greatly increases the utilization value of the waste tire rubber, and has broad application prospect.
Description
Technical field
The invention belongs to chemical engineering of materials and environmental protection technical field, particularly a kind ofly utilize waste tire rubber to prepare process of active carbon.
Background technology
Along with rapid development of automobile industry, the quantity of junked tire also grows with each passing day.At present, annual nearly 1,500,000,000 tires that surpass in the whole world are scrapped.2005, China's tire output reached 31,820 ten thousand, and annual production has broken through 300,000,000 critical points first, is only second to the U.S. and Japan, becomes third place in the world giant tyre producing country.Meanwhile, China also produces up to nearly 100,000,000 junked tire (this numeral also will be the trend that progressively increases) every year, yet has nearly about 3,000 ten thousand to can not get reclaiming, and utilization ratio is very low, has caused the serious wasting of resources.On the other hand, junked tire exposes stacking chronically, has not only taken a large amount of soils, and through exposing to the sun and rain, very easily grows the killing propagation disease, also causes easily and has caused serious environmental problem by fire.Therefore, how resource utilization recycle junked tire prevents that it from polluting environment, is China, also is that the outstanding problem that Sustainable development faces is adhered in the whole world.At present, waste old is recycled project and has been listed in the China's Agenda 21 scheme, and the recycling of waste old is just developing into new environmental protection industry.
The mode of common recycling waste tire rubber mainly comprises: tyre rebuilding, pyrolysis, production rubber powder and reclaimed rubber etc.Because junked tire carbon content height, some investigators' trials served as the presoma of preparation activated carbon with it in recent years, and the evidence waste tire rubber is the better starting material of preparation activated carbon.Because the waste tire rubber carbon content up to 60-75%, is therefore handled by certain carbonization-activation and be can be made into low ash content fine activated carbon product.Generally, carbonization and reactivation process are carried out continuously or simultaneously, so often cause raw material can not fully contact with activator, thus can only come passive raising activation effect by the consumption that strengthens activator, thus cause cost to increase considerably.
It is raw material with the waste tire rubber that the present invention satisfies research and development, by optimizing carbonization, activating process, preparation mesothyrid process of active carbon.The activated carbon property of this method preparation is stable, and the mesopore prosperity is more suitable for the macromolecular cpd that can't adsorb in the common ature of coal activated carbon of absorption and prepares compound activated carbon as the support materials of microorganism and catalyzer.The present invention provides new angle and approach for the recycling of waste tire rubber, for save energy, improve environment, reduce to pollute and to have most important theories and practice significance.
Summary of the invention
The objective of the invention is at above-mentioned existing problems, provide that a kind of technology is simple, save energy, environmental pollution is little, production cost is low and make that activated carbon property is stable, the flourishing waste tire rubber that utilizes of mesopore prepares process of active carbon.
Technical scheme of the present invention:
A kind of waste tire rubber that utilizes prepares process of active carbon, and carbonization among the preparation technology and reactivation process are separately carried out, and first carbonization is postactivated, and concrete implementation step is as follows:
1) waste tire rubber being ground into the particle of diameter＜5mm, putting into conversion unit, is carbonization 45 minutes under 600 ℃ the nitrogen atmosphere in temperature, forms the carbide with initial apertures gap structure;
2) above-mentioned carbide is mixed with activator potassium hydroxide, grinds after 15 minutes, again under nitrogen atmosphere in 850 ℃ of activation treatment 120 minutes, promptly get activation products;
3) above-mentioned activation products are cooled to room temperature under nitrogen atmosphere, pickling is then washed to neutrality repeatedly with high purity water at last, and oven dry can make final activated carbon product in 110 ℃ of baking ovens.
The waste tire rubber carbon content is 60% in the described step 1), ash oontent is 24%.
Conversion unit in the described step 1) is a tube furnace, and its temperature rise rate is 5 ℃/min, and nitrogen flow rate is 0.3L/min.
Described step 2) mass ratio of carbide and activator potassium hydroxide is 1: 2 in.
Pickling is for being the salt acid soak 24 hours of 1mol/L with concentration in the described step 3).
Advantage of the present invention is: technology is simple, save energy, environmental pollution is little, production cost is low; Make that activated carbon property is stable, mesopore is flourishing, be more suitable for the macromolecular cpd that can't adsorb in the common ature of coal activated carbon of absorption and prepare compound activated carbon as the support materials of microorganism and catalyzer; Realized turning waste into wealth, greatly improved the utility value of waste tire, had broad application prospects.
Embodiment
Embodiment:
A kind of waste tire rubber that utilizes prepares process of active carbon, concrete implementation step is as follows: the particle that 1) waste tire rubber is ground into diameter＜5mm, the waste tire rubber carbon content is 60%, ash oontent is 24%, get 20.0g respectively and place tube furnace, carry out carbonizing treatment under nitrogen atmosphere, temperature rise rate is 5 ℃/min, and nitrogen flow rate is 0.3L/min, carbonization temperature is 600 ℃, and carbonization time is 45 minutes; 2) take out carbide after being cooled to room temperature under the nitrogen atmosphere, grind to form particulate of uniform size with mortar, add activator potassium hydroxide powder, the mass ratio of carbide and activator potassium hydroxide is 1: 2, and mixture is ground 15 minutes to the state of dissolving, and then mixture is carried out activation treatment under nitrogen atmosphere, temperature rise rate is 20 ℃/min, nitrogen flow rate is 0.3L/min, and activation temperature is 850 ℃, and soak time is 120 minutes; 3) take out activation products after being cooled to room temperature, soaked 24 hours with concentrated hydrochloric acid (1mol/L), wash repeatedly to neutrality with high purity water at last, oven dry makes active carbon with high specific surface area in 110 ℃ of baking ovens.
By scanning electron microscope and transmission electron microscope the active carbon with high specific surface area that makes is detected, the result shows: non-carbon species such as oxygen hydrogen is discharged from when pyrolytic decomposition, carbon atom then reconfigures, formation is with the plane microlitic structure of hexagonal array, their arrangement is irregular, and the vesicular structure of activated carbon has just been brought up in little intergranular space.Its BET specific surface area is 398.5m
2/ g, mean pore size is 5.12nm, (2nm＜aperture＜50nm) volume is 0.31cm to mesopore
3/ g accounts for 60% of total pore volume.This activated carbon product principal character is as shown in table 1
Table 1
| Productive rate (%) | Specific surface area (m 2/g) | Mean pore size (nm) | Total pore volume (cm 3/g??) | Micro pore volume (cm 3/g??) | Mesopore volume (cm 3/g??) | Mesopore volume is than (%) | |
| Gac | ??25.0 | ??398.5 | ??5.12 | ??0.51 | ??0.11 | ??0.31 | ??60.0 |
Application example:
Accurately take by weighing through being ground to the dry activated carbon sample 20mg of 150 μ m, place the Erlenmeyer flask of 100mL tool grinding port plug, add a certain amount of damping fluid for preparing in advance, cover tight bottle cap, left standstill 24 hours so that the sample complete wetting.Add an amount of methylene blue solution, then Erlenmeyer flask is placed on the level concussion machine and mixed 3 days, to guarantee to reach adsorption equilibrium with (23-25 ℃) under 150 rev/mins the speed room temperature.Behind the ready to balance, getting supernatant liquor is in the cuvette of 1cm in optical path, measures absorbancy with spectrophotometer under wavelength 665nm, finally obtains the methylene blue equilibrium adsorption value (235mg/g) of sample according to typical curve.Iodine sorption value carries out according to method shown in the GB/T 12496.8-1999, and the iodine sorption value of mensuration is 793.8mg/g.Iodine sorption value gets the very big cognation that how much has big or small and activated carbon capillary, and the methylene blue molecular diameter is bigger, mainly is adsorbed in the mesopore hole, so sign gac mesopore what the size of its adsorptive value is mainly used in.Because the present invention is the mesothyrid activated carbon product, so iodine sorption value is relatively low.This shows that this product is suitable for adsorbing macromolecular cpd that common ature of coal activated carbon can't adsorb and prepares compound activated carbon as the support materials of microorganism and catalyzer.
Claims (5)
1. one kind is utilized waste tire rubber to prepare process of active carbon, it is characterized in that: carbonization among the preparation technology and reactivation process are separately carried out, and first carbonization is postactivated, and concrete implementation step is as follows:
1) waste tire rubber being ground into the particle of diameter＜5mm, putting into conversion unit, is carbonization 45 minutes under 600 ℃ the nitrogen atmosphere in temperature, forms the carbide with initial apertures gap structure;
2) above-mentioned carbide is mixed with activator potassium hydroxide, grinds after 15 minutes, again under nitrogen atmosphere in 850 ℃ of activation treatment 120 minutes, promptly get activation products;
3) above-mentioned activation products are cooled to room temperature under nitrogen atmosphere, pickling is then washed to neutrality repeatedly with high purity water at last, and oven dry can make final activated carbon product in 110 ℃ of baking ovens.
2. method according to claim 1 is characterized in that: the waste tire rubber carbon content is 60% in the described step 1), ash oontent is 24%.
3. method according to claim 1 is characterized in that: the conversion unit in the described step 1) is a tube furnace, and its temperature rise rate is 5 ℃/min, and nitrogen flow rate is 0.3L/min.
4. method according to claim 1 is characterized in that: the mass ratio of carbide and activator potassium hydroxide is 1: 2 described step 2).
5. method according to claim 1 is characterized in that: described step 3) pickling is for being the salt acid soak 24 hours of 1mol/L with concentration.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103130223A (en) * | 2013-03-25 | 2013-06-05 | 东南大学 | Method for preparing activated carbon by using municipal solid waste as raw material |
| CN104085889A (en) * | 2014-06-23 | 2014-10-08 | 福建工程学院 | Preparation method of granular activated carbon |
| CN105129794A (en) * | 2015-07-13 | 2015-12-09 | 安徽成方新材料科技有限公司 | Nano cotton adsorption-reinforced composite spherical activated carbon and preparation method thereof |
| CN106241803A (en) * | 2016-07-25 | 2016-12-21 | 河南东和环保科技股份有限公司 | A kind of method utilizing waste tyre pyrolytic white carbon black to make activated carbon |
| CN106744941A (en) * | 2017-02-28 | 2017-05-31 | 苏州顶裕节能设备有限公司 | Activated carbon and its method prepared by a kind of utilization discarded object |
| CN108314038A (en) * | 2018-03-28 | 2018-07-24 | 徐州工业职业技术学院 | A method of preparing electrode material for super capacitor using waste rubber powder pyrolysis |
| CN109305682A (en) * | 2018-09-30 | 2019-02-05 | 江苏斯沃得环保科技有限公司 | A kind of honeycombed absorbent charcoal material and preparation method thereof |
| CN110655598A (en) * | 2019-11-04 | 2020-01-07 | 宁夏大学 | Polyethylene/carbonized waste rubber powder composite material and preparation method and application thereof |
| CN111530422A (en) * | 2020-05-14 | 2020-08-14 | 合肥学院 | Method for preparing modified carbon composite adsorbent by using carbon-containing high-molecular industrial wastes |
| CN112062124A (en) * | 2020-09-09 | 2020-12-11 | 艾思尔信息科技(上海)有限公司 | Activated carbon prepared from domestic solid waste and preparation method and application thereof |
| CN112110446A (en) * | 2020-09-01 | 2020-12-22 | 华中科技大学 | Method and system for preparing fuel oil and electrode carbon material by comprehensively treating waste radial tires |
| CN113244885A (en) * | 2021-04-25 | 2021-08-13 | 龙岩市华研活性炭科技有限公司 | Modified activated carbon for aquarium filtration and adsorption and preparation method thereof |
| CN113955754A (en) * | 2021-10-27 | 2022-01-21 | 赛轮集团股份有限公司 | Waste tire-based mesoporous carbon and preparation method thereof, rubber composition and preparation method and application thereof |
| US11254574B2 (en) * | 2018-11-30 | 2022-02-22 | Zhejiang A & F University | Graphene material prepared from waste tire and preparation method thereof |
-
2009
- 2009-11-13 CN CN200910228529A patent/CN101708841A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103130223A (en) * | 2013-03-25 | 2013-06-05 | 东南大学 | Method for preparing activated carbon by using municipal solid waste as raw material |
| CN104085889A (en) * | 2014-06-23 | 2014-10-08 | 福建工程学院 | Preparation method of granular activated carbon |
| CN105129794A (en) * | 2015-07-13 | 2015-12-09 | 安徽成方新材料科技有限公司 | Nano cotton adsorption-reinforced composite spherical activated carbon and preparation method thereof |
| CN106241803A (en) * | 2016-07-25 | 2016-12-21 | 河南东和环保科技股份有限公司 | A kind of method utilizing waste tyre pyrolytic white carbon black to make activated carbon |
| CN106241803B (en) * | 2016-07-25 | 2018-12-07 | 河南东和环保科技股份有限公司 | A method of active carbon being made using waste tyre pyrolytic carbon black |
| CN106744941A (en) * | 2017-02-28 | 2017-05-31 | 苏州顶裕节能设备有限公司 | Activated carbon and its method prepared by a kind of utilization discarded object |
| CN108314038A (en) * | 2018-03-28 | 2018-07-24 | 徐州工业职业技术学院 | A method of preparing electrode material for super capacitor using waste rubber powder pyrolysis |
| CN109305682A (en) * | 2018-09-30 | 2019-02-05 | 江苏斯沃得环保科技有限公司 | A kind of honeycombed absorbent charcoal material and preparation method thereof |
| US11254574B2 (en) * | 2018-11-30 | 2022-02-22 | Zhejiang A & F University | Graphene material prepared from waste tire and preparation method thereof |
| CN110655598A (en) * | 2019-11-04 | 2020-01-07 | 宁夏大学 | Polyethylene/carbonized waste rubber powder composite material and preparation method and application thereof |
| CN110655598B (en) * | 2019-11-04 | 2022-03-22 | 宁夏大学 | Polyethylene/carbonized waste rubber powder composite material and preparation method and application thereof |
| CN111530422A (en) * | 2020-05-14 | 2020-08-14 | 合肥学院 | Method for preparing modified carbon composite adsorbent by using carbon-containing high-molecular industrial wastes |
| CN111530422B (en) * | 2020-05-14 | 2022-05-20 | 合肥学院 | Method for preparing modified carbon composite adsorbent by using carbon-containing polymer industrial wastes |
| CN112110446A (en) * | 2020-09-01 | 2020-12-22 | 华中科技大学 | Method and system for preparing fuel oil and electrode carbon material by comprehensively treating waste radial tires |
| CN112062124A (en) * | 2020-09-09 | 2020-12-11 | 艾思尔信息科技(上海)有限公司 | Activated carbon prepared from domestic solid waste and preparation method and application thereof |
| CN113244885A (en) * | 2021-04-25 | 2021-08-13 | 龙岩市华研活性炭科技有限公司 | Modified activated carbon for aquarium filtration and adsorption and preparation method thereof |
| CN113955754A (en) * | 2021-10-27 | 2022-01-21 | 赛轮集团股份有限公司 | Waste tire-based mesoporous carbon and preparation method thereof, rubber composition and preparation method and application thereof |
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Open date: 20100519 |