CN1815007A - Active carbon and process for producing the same - Google Patents
Active carbon and process for producing the same Download PDFInfo
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- CN1815007A CN1815007A CNA2006100068368A CN200610006836A CN1815007A CN 1815007 A CN1815007 A CN 1815007A CN A2006100068368 A CNA2006100068368 A CN A2006100068368A CN 200610006836 A CN200610006836 A CN 200610006836A CN 1815007 A CN1815007 A CN 1815007A
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Abstract
To provide a granular activated carbon having mechanical strength and abrasive resistance, having many narrow pores suitable for adsorbing an organic solvent, particularly a vaporized fuel gas, and also having a high filling density and to provide an industrially advantageous manufacturing method of the granular activated carbon. The granular activated carbon wherein a specific surface area calculated by a BET method (multipoint method) in a nitrogen adsorption isotherm determined from a nitrogen adsorption amount at a liquid nitrogen temperature is 1,000-2,500 m<SP>2</SP>/g and also a half width of a D band peak in the vicinity of 1,360 cm<SP>-1</SP>in a Raman spectral analysis is <=120 cm<SP>-1</SP>and a half width of a G band peak in the vicinity of 1,580 cm<SP>-1</SP>is <=100 cm<SP>-1</SP>is provided, and its manufacturing method is provided.
Description
Technical field
The present invention relates to active carbon and manufacture method thereof.Particularly, the present invention relates to following active carbon and manufacture method thereof, the specific surface area that this active carbon calculates by BET method (multipoint method) is 1000-2500m
2/ g, and in the Raman spectrum analysis at 1360cm
-1Near the half-peak breadth at D band peak is less than or equal to 120cm
-1, at 1580cm
-1Near the half-peak breadth at G band peak is less than or equal to 100cm
-1
Background technique
Because active carbon has good adsorptive power, what in the prior art active carbon is widely used in deodorizing, liquid removal of impurities, solvent vapo(u)r removes, reclaims or the like various uses.In recent years, the countermeasure that raises at vehicle exhaust problem and fuel cost is subjected to special concern, and utilizing porous adsorbing material such as active carbon is wherein a kind of as the sorbing material of evaporation combustion gas.
Evaporate the absorption of combustion gas behind this filling adsorption material, the device of desorb is called as exhaust gas converter (canister).In exhaust gas converter, the gasoline vapour that evaporates from fuel tank is adsorbed material absorption, the outer gas effect desorb that the gasoline vapour that is adsorbed sucks during by engine operation, the gasoline vapour that desorbs import in the engine intake manifold as sucking pipe, and burn in motor.
Before this, carried out the trial of various developmental research, roughly be divided into: to the research of the good sorbing material aspect of absorption, the desorption ability of liquid fuel steam with considered the research of the device aspect of the thermal efficiency for the performance that improves exhaust gas converter.The general forming charcoal that uses coconut husk charcoal, carbo lignius, coal isoreactivity charcoal and obtained by active carbon forming is as sorbing material, for example, the known forming charcoal (patent documentation 1) that in granular active carbon, adds short fibre, uses latex to form as the tackiness agent moulding.
Patent documentation 1: special public clear 48-7194 communique.
In addition, known active carbon by the oxidation processes modification also, this active carbon that shows on the books is especially suitable for use as the exhaust gas converter (patent documentation 2) of the automobile of the mixed vapour that uses gasoline and alcohol. In addition, 2 kinds of active carbons that also the average packed density of known use is different are as the active carbon (patent documentation 3) good and with low cost to the adsorption capacity of evaporated fuel.
Patent documentation 2: special fair 1-52324 communique.
Patent documentation 3: real fair 5-17411 communique.
In addition; the forming charcoal that improves of known mechanical intensity and mar proof also; for example; disclose with the granular active carbon of lignocellulosic base material pulverize, mix with bentonite, granulating, dehydration, drying and heat-treat prepared pressed active carbon (patent documentation 4); and with the granular active carbon of lignocellulosic base material pulverize, mix with organic bond, granulating, dehydration, drying and heat-treat prepared pressed active carbon (patent documentation 5), the particle charcoal (patent documentation 6) with certain butane working capacity and wear rate is also disclosed.
Patent documentation 4: the spy opens flat 9-249409 communique.
Patent documentation 5: the spy opens flat 10-203811 communique.
Patent documentation 6: the spy opens the 2000-313611 communique.
Summary of the invention
In recent years, the requirement of exhaust gas converter miniaturization, light occurred, in order to adapt to this demand, the raising of the optimization of the pore of sorbing material, the performance of per unit volume is necessary.Based on this viewpoint, from the prior art, the active carbon and the forming charcoal of above-mentioned patent documentation 1-3 record can not fully satisfy such needs.
Patent documentation 4 and 5 all relates to after the wood activated charcoal pulverizing, the technology of the pressed active carbon that interpolation tackiness agent formation particle, calcination form, though the pressed active carbon of Xing Chenging can improve mechanical strength and wearability thus, tackiness agent can be difficult to the pore obstruction to give full play to the performance of active carbon.The situation of the particle charcoal of record also is the same in the patent documentation 6.
In order to capture evaporated fuel effectively, the known active carbon that is conceived to the pore-size distribution of active carbon and develops as an example, knownly for example prevents material (patent documentation 7) by having the fuel vaporization that fibrous activated carbon that specific pore distributes forms; In heat treated, improve the method (patent documentation 8) that the active carbon pore distributes by regulating oxygen concentration; More than or equal to the aperture of the pore of 50 weight % in the scope of 1.4-2.8nm and 1 milliliter of (mL) sorbent have granular fuel vapor adsorbent (patent documentation 9) more than or equal to the 0.3mL pore volume.
Patent documentation 7: special public clear 61-55611 communique.
Patent documentation 8: the spy opens flat 6-127912 communique.
Patent documentation 9: the spy opens the 2003-314387 communique.
Though think that invalid pore is few in the patent documentation 7 disclosed fibrous activated carbons, say from the contacting efficiency aspect effectively to prevent fuel vaporization that though the performance height of fibrous activated carbon unit weight, the performance of per unit volume is not necessarily abundant.In addition, the cost height of fibrous activated carbon, there is difficult point in its commercial Application.
In the patent documentation 8, though proposed when 200-400 ℃ of following calcination, oxygen concentration to be controlled to more than or equal to 5 volume %, under surpassing 400 ℃ temperature, adjust oxygen concentration during calcination to less than 5 volume %, thereby improve the method for pore size distribution, but, cause combustion reaction easily, if reaction then difficulty is carried out in reaction at low temperatures on the other hand if therefore local temperature is out of control because the reaction of carbon and oxygen is exothermic reaction, thereby cause temperature control difficulty, be difficult to stably produce.
Patent documentation 9 disclosed fuel vapor adsorbent are that the product of alternative fiber shaped activated carbon proposes as the purpose for anti-long-time use.But the disclosed fuel vapor adsorbent of the document specifically is to utilize the effect of expensive black lead powder and commercial Application aspect such as the product, the activating velocity that obtain be abundant inadequately from it, and being difficult to this is satisfied product.In addition, though use the sorbing material of coal functional, it is functional not disclose which kind of coal fully.Therefore, the purpose of this invention is to provide a kind of mechanical strength and wearability good, have and be suitable for adsorbing the organic solvent particularly pore and the high active carbon of filling density of combustion gas in a large number, and help industry and make this process of active carbon.
The inventor in order to achieve the above object, the specific surface area by being conceived to active carbon and the pore volume of special pore size distribution, and the D band of specific wavelength and the half-peak breadth that G is with the peak in the Raman spectrum analysis, carry out detailed research repeatedly, found that to be suitable for adsorbing the active carbon that evaporates combustion gas.That is to say, the invention provides a kind of active carbon, it is characterized in that: in the nitrogen adsorption isotherm of being tried to achieve by the nitrogen extent of adsorption under the liquid nitrogen temperature, the specific surface area that calculates by BET method (multipoint method) is 1000-2500m
2/ g, and in the Raman spectrum analysis at 1360cm
-1Near the half-peak breadth at D band peak is less than or equal to 120cm
-1, at 1580cm
-1Near the half-peak breadth at G band peak is less than or equal to 100cm
-1
In addition, another aspect of the invention is a kind of manufacture method of active carbon, the carbide that wherein carbonaceous material charing processing back ash content is less than or equal to 4 weight % carries out gas activation.
Active carbon of the present invention to organic solvent, particularly to evaporate the adsorptive power of combustion gas good, and has high filling density and high mechanical properties, therefore this active carbon is preferred in solvent recovery unit or the exhaust gas converter etc.In addition, by active carbon manufacture method of the present invention, can advantageously make this active carbon industrial.
Embodiment
As the carbonaceous material of active carbon raw material,, can from plant class, mineral substance, natural matter, synthesis material etc., extensively select so long as, then have no particular limits by activating the material that forms active carbon.
Particularly, for the carbonaceous material of plant class, can exemplify shells such as timber, charcoal, cocoanut shell; For the carbonaceous material of mineral substance, can exemplify coal, petroleum-type and/or coal class pitch, coke; For natural matter, can exemplify natural fibre such as cotton, fiber crops, regenerated fibers such as cellulose ester, viscose rayon, semisynthetic fibres such as acetate, triacetate; As synthesis material, it is polyamide-based to enumerate nylon etc., polyvinyl alcohols such as vinylon, propylene polypropylene nitriles such as (ア Network リ Le), TPOs such as polyethylene, polypropylene, polyurethane, phenolic resin, vinyl chloride resin etc.These materials can also be mixed and use.
There is no particular limitation for the shape of carbonaceous material, and granular, Powdered, fibrous, sheet etc. all can be used, and considers preferably granular from being convenient to the processing aspect.Carbonaceous material as fibrous or sheet, can exemplify native cellulose fibres such as cotton, regenerated cellulose fibers such as viscose rayon, high wet modulus viscosity glue artificial fiber, paper pulp fiber, the fabric of synthetic fiber such as polyvinyl alcohol fiber, ethylene-vinyl alcohol fiber, phenol fibre etc. or supatex fabric, film, felt, tablet.
Carbonaceous material charing, activation form active carbon, as the condition of charing, for example can adopt feeding small amounts of inert gas in the clearance type revolving furnace when, condition such as handle under more than or equal to 300 ℃ temperature.As activation method, can the using gases activation, any activation method such as medicine activation, but consider from the viewpoint of the active carbon that obtains high mechanical properties, high filling density, preferably adopt gas activation.For employed gas in the gas activation, can enumerate water vapour, carbon dioxide, oxygen, LPG exhaust (the young row of LPG ガ ス) or their mixed gas etc., consider that from Security, reactive aspect it is preferred activating with the gas that preferably contains 10-50 volume % water vapour.
Activation is carried out under 700 ℃-1100 ℃ temperature, and in order to keep the overactivity productive rate, to make the pore prosperity, preferably activates with 3-50 ℃/hour warming velocity as far as possible lentamente.Preferably exemplify and slowly be warming up to 800 ℃ of methods of tens of hours of activation in 1000 ℃, perhaps near activation 800 ℃ after tens of hours, near further method of long-time activation or the like 1000 ℃ again.Can not unify regulation for soak time, should suitably implement according to required specific surface area and pore distribution.
Active carbon of the present invention is that in the nitrogen adsorption isotherm of being tried to achieve by the nitrogen extent of adsorption under the liquid nitrogen temperature, the specific surface area of using BET method (multipoint method) to calculate is 1000-2500m
2/ g, preferred 1100-2000m
2The active carbon of/g is preferred for the exhaust gas converter purposes.If owing to improve the adsorption performance of evaporation combustion gas, then specific surface area must increase, the increase filling density along with specific surface area descends on the other hand, and mechanical strength also descends, so specific surface area must be less than or equal to 2500m
2/ g.
In addition, as above-mentioned active carbon, in Raman spectrum analysis, at 1360cm
-1Near the half-peak breadth at D band peak is less than or equal to 120cm
-1, 1580cm
-1Near the half-peak breadth at G band peak is less than or equal to 100cm
-1Be necessary.If 1360cm
-1Near the half-peak breadth at D band peak surpasses 120cm
-1, and 1580cm
-1Near the not enough 100cm of half-peak breadth at G band peak
-1, will show mechanical strength and reduce, the tendency that the aeration resistance behind the swing crushing rises.The half-peak breadth at preferred D band peak is less than or equal to 100cm
-1, the half-peak breadth at G band peak is less than or equal to 90cm
-1That is to say, though active carbon specific surface area height of the present invention also has the high absorption property and the high mechanical properties of band of D in the Raman spectrum analysis and G band peak formation spike in the lump.
Generally speaking, adsorption isotherm and desorption isotherm are inconsistent and depict hysteresis loop.For its reason various sayings are arranged, have viewpoint to think that the formation of absorption side crescent moon is inequality with the formation mechanism of desorb side crescent moon, till the lower relative pressure, the interior liquid phase of pore is not removed to than absorption the time.The active carbon that is suitable in exhaust gas converter, using be need adsorb repeatedly, the product of desorb, therefore not only adsorptive power is important but also desorption ability is also important.Therefore the pore volume that preferred thermoisopleth during by desorb calculates is big and have suitable fine pore and distribute.
By above-mentioned viewpoint as can be known, if the pore of active carbon is too little, then to the absorption of evaporation combustion gas and just high to the adsorptive power of organic solvent, but the disengaging ability of higher boiling composition then has the step-down tendency, and in addition, if the pore of active carbon is too big, then adsorptive power descends.Therefore, preferably in the nitrogen desorption isotherm of trying to achieve by the nitrogen extent of adsorption under the liquid nitrogen temperature, the pore volume of aperture in the 1.9nm-4nm scope that calculates by Cranston-Inkley method (CI method) is more than or equal to 0.6mL/g, total pore volume is more than or equal to 0.8mL/g, and specific surface area is more than or equal to 1000m
2/ g.
In addition,, and make filling density reduce, expect that therefore this pore is few as much as possible because the pore of 50nm-1 μ m participates in absorption hardly.Therefore, for active carbon of the present invention, the aperture of pressing the gaging hole method to record by mercury preferably is less than or equal to 0.25mL/g in the pore volume of 50nm-1 μ m.Because wooden class carbonaceous material has the pore more than or equal to 1 μ m from plant tissue, therefore use this big the least possible carbonaceous material of pore.
Because active carbon of the present invention is filled use in exhaust gas converter and solvent recovery unit etc., the therefore preferred high product of filling density.Generally speaking, along with increasing adsorptive power, specific surface area improves.But,, can not give full play to the tendency of performance when practicality is arranged along with the increase filling density of specific surface area reduces.Therefore, the filling density of active carbon of the present invention is preferably greater than or equals 0.3g/mL.
As previously mentioned,, therefore use this big the least possible carbonaceous material of pore, but also can this pore be filled out with tackiness agents such as pitch and the tar carbonaceous material of holding concurrently because wooden class carbonaceous material has the pore more than or equal to 1 μ m from plant tissue.
As the carbonaceous material of active carbon raw material of the present invention, compare with the plant class carbonaceous material that just has a lot of macropores in feed stage, more preferably use mineral substance and synthesis material.50 weight % of preferred carbonaceous material or abovely constitute by mineral substance, especially coal class carbonaceous material.As coal class carbonaceous material, can use any coal in cohesiveencess coal, non-adhesive coal, semianthracite, the anthracite etc., preferably use non-adhesive coal or the smokeless coal of fixed carbon composition more than or equal to 70 weight %.
Shape to active carbon is not particularly limited, and broken shape, granular, Any shape such as spherical all can.Also can be that various difform products mix, but consider, preferably cylindric, granular, spherical etc. granular from improving the filling density aspect.Because if particle diameter is too little, though filling density increases, aeration resistance raises and produces practical problem; In addition,, then cause filling density to descend, and the particle gap become sky and causes gas directly to pass through easily, the scope of therefore preferred about 0.5-5mm if particle diameter is too big.
Active carbon of the present invention can preferably prepare by the carbide gas activation that carbonaceous material charing processing back ash content is less than or equal to 4 weight %.If the temperature that charing is handled is too high, then can excessive crystallization, activation processing is difficult to carry out; In addition, if temperature is too low, then charing is handled insufficiently, and volatile ingredient content is higher, and at high temperature evaporates together during priming reaction, produces pore, the slight crack of not contributing adsorptive power thereupon, therefore preferably implements under 500-1100 ℃ temperature.
As previously mentioned, carbonaceous material preferably at least 50 weight % or more than, preferred 80 weight % or above be mineral substance, especially coal class carbonaceous material.As coal class carbonaceous material, preferably use non-adhesive coal or the smokeless coal of fixed carbon composition more than or equal to 70 weight %.Fixed carbon composition in the coal feedstock and ash content can be confirmed by measuring according to JIS M 8812 coal classes and coke class technical analysis method.In addition, when selecting non-adhesive coal, can be according to the crucible swelling test method of JIS M 88086, sample is joined in the crucible of appointment, under defined terms, heat, the residue that generated and nominal contour are compared the back measure and characterize cohesiveencess parameter (table わ The ボ Application index), preferably this cohesiveencess parameter is less than or equal to 1 and is preferably 0 coal.
The ash content of active carbon is preferably few as much as possible.Ash content can suppress because the catalytic of ash content causes the organic solvent that is adsorbed or evaporates combustion gas decomposition, polymerization by reducing, thereby make the phenomenon that reuse efficiency reduces, can suppress excessive priming reaction in addition, make pore easily growth and suppressing do not contribute the increase of the pore of adsorptive power, thereby correspondingly improve durability degree.The ash content of the carbide after therefore, carbonaceous material charing of the present invention is handled preferably is less than or equal to 4 weight %.
When using the many carbonaceous material of ash content, can use behind the deliming, also can charing after deliming be less than or equal to 4 weight % to ash content.Below by embodiment the present invention is further specified, but the present invention is not limited.In addition, use following mode to measure the rerum natura of the active carbon among the embodiment.
Nitrogen adsorption isotherm under the liquid nitrogen temperature: ベ Le ソ one プ 18 that uses Japanese ベ Le Co., Ltd. to make measures.
Measure pore volume by BET method (multipoint method) measurement the specific area and by the CI method: use the software 4.0.13 version of Japanese ベ Le Co., Ltd. system to measure.
The pore volume of active carbon in the 50nm-1 mu m range: use the pore-size distribution testing apparatus (AUTOPORE IV) of Shimadzu Scisakusho Ltd's system, in mercury pressure is the scope of 1.35psia-3 ten thousand psia, measure.
The mensuration of Raman spectrum (ラ マ Application ス ペ Network ト Le): use カ イ ザ one system Laman spectrophotometer Holoprobe 532 to measure the (Nd of excitation line: 532nm
3+: YAG laser; Detector: charge coupled device (charge coupled device); Laser power: 4mW-10mW), try to achieve 1360cm
-1Neighbouring D band peak and 1580cm
-1Near the half-peak breadth at G band peak.
Characterize the butane working capacity (BWC, butane workingcapacity) of fuel fume adsorption performance: measure (following abbreviation: BWC/ASTM) according to ASTM-D5228.Use as exhaust gas converter, BWC is practical more than or equal to 10g/dL, is preferably greater than or equals 13g/dL.
Embodiment 1
Being that (index of cementation is 0 for the anthracite of 2.5 weight % with respect to the ash content after the washing of 100 weight portions; the fixed carbon composition is 85 weight %) powder; mix the ratio of coal tar oil of pitch, 25 weight portions of 10 weight portions and make mixture, use ring-like granulator that field Steel Co., Ltd makes that said mixture is configured as diameter and be 3mm, length cylindric active carbon raw material as 3-10mm.By being warmed up to 750 ℃ with 3 hours, this raw material carries out the charing processing.
Then, under the mixed gas atmosphere of the nitrogen 70 volume % that contain 20 volume % water vapour, carbon dioxide 10 volume %, be warmed up to 800 ℃, and under this state, continued activation processing 20 hours with 5 hours., further be warmed up to 980 ℃, and under this state, continued activation processing 24 hours, obtain granular active carbon (sample 1) thereafter.
The measurement result of the Raman spectrum analysis of sample 1, the specific surface area that records by BET method (multipoint method), the aperture that records by the CI method, pore volume, filling density is as shown in table 1.In addition, the BWC/ASTM of sample 1 is 17.0.
Embodiment 2
With moulding similarly to Example 1, charing product after 20 hours, further be warmed up to 980 ℃ 800 ℃ of activation under the mixed gas atmosphere identical with embodiment 1, and continued activation processing 18 hours, obtain granular active carbon (sample 2).The rerum natura of sample 2 is as shown in table 1.In addition, the BWC/ASTM of sample 2 is 15.0.
Embodiment 3
With moulding similarly to Example 1, charing product after 20 hours, further be warmed up to 980 ℃ 800 ℃ of activation under the mixed gas atmosphere identical with embodiment 1, and further activation processing 12 hours obtains granular active carbon (sample 3).The rerum natura of sample 3 is as shown in table 1.Its BWC/ASTM is 13.0.
Comparative example 1
As by phosphoric acid activation the BWC/ASTM of the wood activated charcoal BAX1100 (sample 4) that makes of ウ エ ス ト ベ one コ one company of wooden granular active carbon be 11.2.The rerum natura of sample 4 is as shown in table 1.
Comparative example 2
As by phosphoric acid activation the BWC/ASTM of the wood activated charcoal BAX1500 (sample 5) that makes of ウ エ ス ト ベ one コ one company of wooden granular active carbon be 15.1.The rerum natura of sample 5 is as shown in table 1.
Comparative example 3
Phosphoric acid activation the BWC/ASTM of the wood activated charcoal FX1135 (sample 6) that makes of ピ カ company be 10.8.The rerum natura of sample 6 is as shown in table 1.
Embodiment 4
By washing operation preparation ash content is that (index of cementation is 0 for the non-adhesive coal of 2.7 weight %, the fixed carbon composition is 75 weight %) powder is that the coconut carbon material powder of 0.9 weight % mixes according to 80: 20 weight portion ratios with ash content after the same washing.With the moulding similarly to Example 1 of this carbonaceous material mixture, charing, activation, obtain granular active carbon (sample 7).The rerum natura of sample 7 is as shown in table 1.
By the result shown in the table 1 as can be known, the adsorption performance and the mechanical strength of granular active carbon of the present invention are good, and have high filling density.
Table 1
| Sample 1 | Sample 2 | Sample 3 | Sample 4 | Sample 5 | Sample 6 | Sample 7 | |
| BET specific surface area (m 2/g) | 1470 | 1340 | 1120 | 1150 | 1830 | 1730 | 1530 |
| Specific surface area (CI method) desorb side (m 2/g) | 1700 | 1240 | 1140 | 760 | 1400 | 1190 | 1500 |
| Pore volume (CI method) desorb side (mL/g) | 1.18 | 0.84 | 0.81 | 0.71 | 1.20 | 1.13 | 1.19 |
| 1.9-4nm desorb side pore volume (CI method) (m 2/g) | 1.08 | 0.76 | 0.69 | 0.38 | 0.76 | 0.56 | 1.05 |
| G is with peak half-peak breadth (cm -1) | 85.2 | 68.9 | 54.5 | 110 | 125 | 105 | 91.5 |
| D is with peak half-peak breadth (cm -1) | 95.1 | 88.5 | 85.2 | 223 | 236 | 216 | 102 |
| The pore volume (mL/g) of 50nm-1 μ m | 0.237 | 0.227 | 0.152 | 0.208 | 0.347 | 0.556 | 0.218 |
| Filling density (mL/g) | 0.32 | 0.35 | 0.37 | 0.36 | 0.30 | 0.23 | 0.31 |
| BWC/ASTM(g/dL) | 17.0 | 15.0 | 13.0 | 11.2 | 15.1 | 10.8 | 16.8 |
Industrial applicability
Since active carbon of the present invention to organic solvent steam, particularly to evaporate the adsorption capacity of combustion gas good, and have simultaneously high packed density and high mechanical properties, therefore be suitable in solvent recovery unit and exhaust gas converter etc., using as the sorbing material that evaporates combustion gas. In addition, by active carbon manufacture method of the present invention, can advantageously make this active carbon industrial.
Claims (10)
1. active carbon, it is characterized in that: this active carbon is in the nitrogen adsorption isotherm of being tried to achieve by the nitrogen extent of adsorption under the liquid nitrogen temperature, and the specific surface area of calculating by BET method (multipoint method) is 1000～2500m
2/ g, and in Raman spectrum analysis, 1360cm
-1Near the half-peak breadth at D band peak is less than or equal to 120cm
-1, 1580cm
-1Near the half-peak breadth at G band peak is less than or equal to 100cm
-1
2. the described active carbon of claim 1, this active carbon is in the nitrogen desorption isotherm of being tried to achieve by the nitrogen extent of adsorption under the liquid nitrogen temperature, the aperture of calculating by the Cranston-Inkley method in the pore volume of 1.9nm～4nm scope more than or equal to 0.6mL/g, total pore volume is more than or equal to 0.8mL/g, and specific surface area is more than or equal to 1000m
2/ g.
3. claim 1 or 2 described active carbons, the aperture that this active carbon presses the gaging hole method to record by mercury is less than or equal to 0.25mL/g in the pore volume of 50nm～1 mu m range.
4. each described active carbon in the claim 1～3, the filling density of this active carbon is more than or equal to 0.3g/mL.
5. each described active carbon in the claim 1～4, at least 50 weight % of this active carbon or above be to be the active carbon of raw material with coal class carbonaceous material.
6. the described active carbon of claim 5, described coal class carbonaceous material is noncoking coal or the anthracite of fixed carbon composition more than or equal to 70 weight %.
7. each described active carbon in the claim 1～6, this active carbon is granular.
8. preparation method of active carbon, the carbide that wherein ash content after the carbonaceous material carbonization treatment is less than or equal to 4 weight % carries out gas activation.
9. the described preparation method of active carbon of claim 8, at least 50 weight % of this active carbon or above be to be the active carbon of raw material with coal class carbonaceous material.
10. claim 8 or 9 described preparation method of active carbon, wherein said carbonaceous material is noncoking coal or the anthracite of fixed carbon composition more than or equal to 70 weight %.
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|---|---|---|---|
| JP2005-025887 | 2005-02-02 | ||
| JP2005025887A JP2006213544A (en) | 2005-02-02 | 2005-02-02 | Granular active carbon and its manufacturing method |
| JP2005025887 | 2005-02-02 |
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| Publication number | Publication date |
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| CN1815007B (en) | 2010-09-29 |
| JP2006213544A (en) | 2006-08-17 |
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