CN103803549A - Micron-sized granular active carbon prepared from litchi shells and preparation method thereof - Google Patents
Micron-sized granular active carbon prepared from litchi shells and preparation method thereof Download PDFInfo
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- CN103803549A CN103803549A CN201410057871.7A CN201410057871A CN103803549A CN 103803549 A CN103803549 A CN 103803549A CN 201410057871 A CN201410057871 A CN 201410057871A CN 103803549 A CN103803549 A CN 103803549A
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- litchi
- gac
- exocarp
- active carbon
- litchi exocarp
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 241001629511 Litchi Species 0.000 title claims abstract 9
- 229910052799 carbon Inorganic materials 0.000 title claims description 11
- 239000011148 porous material Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000001179 sorption measurement Methods 0.000 claims abstract description 6
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 5
- 238000009826 distribution Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000000047 product Substances 0.000 claims description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- 238000001994 activation Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000010792 warming Methods 0.000 claims description 10
- 230000004224 protection Effects 0.000 claims description 9
- 238000007598 dipping method Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- 238000003763 carbonization Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- 239000000706 filtrate Substances 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- -1 methylene Chemical group 0.000 claims description 4
- 239000010970 precious metal Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 2
- 230000000274 adsorptive effect Effects 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 claims description 2
- 239000011630 iodine Substances 0.000 claims description 2
- 229910052740 iodine Inorganic materials 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims description 2
- 229910021645 metal ion Inorganic materials 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000003463 adsorbent Substances 0.000 abstract 2
- 239000011149 active material Substances 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 229910000510 noble metal Inorganic materials 0.000 abstract 1
- 244000183278 Nephelium litchi Species 0.000 description 39
- 239000002994 raw material Substances 0.000 description 11
- 230000004913 activation Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 240000007582 Corylus avellana Species 0.000 description 2
- 235000007466 Corylus avellana Nutrition 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 206010018498 Goitre Diseases 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 102000011782 Keratins Human genes 0.000 description 2
- 108010076876 Keratins Proteins 0.000 description 2
- 241001093760 Sapindaceae Species 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
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- 230000012010 growth Effects 0.000 description 2
- 239000010903 husk Substances 0.000 description 2
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- 239000000203 mixture Substances 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 244000068645 Carya illinoensis Species 0.000 description 1
- 235000009025 Carya illinoensis Nutrition 0.000 description 1
- 102000030523 Catechol oxidase Human genes 0.000 description 1
- 108010031396 Catechol oxidase Proteins 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 235000001543 Corylus americana Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 201000004624 Dermatitis Diseases 0.000 description 1
- 240000003133 Elaeis guineensis Species 0.000 description 1
- 235000001950 Elaeis guineensis Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 206010027514 Metrorrhagia Diseases 0.000 description 1
- 235000015742 Nephelium litchi Nutrition 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 241000220289 Pedunculata Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 208000010668 atopic eczema Diseases 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000009924 canning Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
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- 235000005822 corn Nutrition 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 208000001848 dysentery Diseases 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
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- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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Abstract
The invention discloses micron-sized granular activated carbon prepared from litchi shells and a preparation method thereof, and the prepared activated carbon has the advantages of uniform texture, high mechanical property, developed pores, orderly concentrated micropore-mesopore-macropore distribution and specific surface area BET) Is 400 to 600m2·g-1The adsorbent has excellent adsorption performance which is 3-5 times of that of common granular activated carbon, and is a good adsorbent suitable for recovering heavy metals and noble metals. Meanwhile, the conductive material has good conductivity, shows the performance of heavy current charge and discharge, and is an excellent active material for manufacturing high-performance electrochemical capacitor products.
Description
Technical field
The present invention relates to a kind of gac and preparation method thereof, particularly a kind of low surface area of preparing with Litchi exocarp, micron particles gac and preparation method thereof cheaply.
Background technology
Gac is a kind of sorbent material and support of the catalyst of excellent property, have that physical and chemical performance is stable, physical strength is high, acidproof, alkaline-resisting, heat-resisting, water insoluble and the feature such as organic solvent and reproducible utilization, and be widely used in the fields such as electronics, chemical industry, food-processing, metallurgy, medicine, military affairs, the energy and environmental protection (as purification of waste water processing).Along with human society development, particularly nearest one, over 20 years, because being becoming tight global energy day and the sharply deterioration of ecotope, all rapid growths year by year of the demand of gac both at home and abroad.According to the criteria for classification of International Union of Pure and Applied Chemistry(IUPAC) (IUPAC 1972), the hole of porous carbon material is divided into micropore (d < 2 nm) by pore size, three classes such as mesopore (2 nm≤d≤50 nm) and macropore (d > 50 nm).The performance of gac depends mainly on its pore texture, and the hole of different sizes shows different functions.And pore texture is closely connected with activation method and preparation technology, raw materials (precursor) etc.That the preparation method of gac has is physically activated, chemical activation, physical-chemical activation method and catalytic activation method, and preparation technology is comprising the factor such as height, the length of soak time of the selection of activator species and number, charing and the activation temperature of consumption.The change that is gac void distribution can realize by changing activation temperature and raw material and activator proportioning.The raw material of the manufacture gac of selecting both at home and abroad is at present divided into five large classes, is respectively plant (as timber and various agriculture business by product), coal, refinery coke, synthetic polymer, other raw materials (as animal bone, old tire, mud etc.).Wherein, because agriculture business amount of by-products is large, inexpensive, be easy to get, charcoal processing rate is high, be beneficial to and economize on resources and environmental protection, therefore, be often the important source material of preparing gac.Patent and Literature Consult show, many agriculture business by products, and preparing gac as corn cob, Pericarppium arachidis hypogaeae, rice husk, cotton stalk, bagasse, oil palm shell, hazelnut shell, coconut husk, pecan shell and pedunculata pall etc. all has correlative study.But, up to now, there are no with agriculture business by product---Litchi exocarp is prepared the domestic and foreign literature research report of gac as raw material.
Litchi exocarp (Litchi chinensis Shell) is the exocarp that Sapindaceae (Sapindaceae) lichee belongs to aiphyllium plant lichee (Litchi) fruit.Dry exocarp, is irregular cracking, and surperficial russet has most little strumaes, and inner face is smooth, dark-brown, thin keratin and crisp.Except only a few Litchi exocarp is because being used as Chinese medicine with treatment dysentery, metrorrhagia, eczema containing polyphenoloxidase, for a long time, overwhelming majority Litchi exocarp is directly used as fertilizer, goes out of use or burnt in vain, has caused the significant wastage of resource, and has seldom carried out deep processing, comprehensive utilization.In fact, Litchi exocarp contains abundant Mierocrystalline cellulose and xylogen, and a small amount of mineral substance etc.From constituent content, Litchi exocarp is mainly elementary composition by carbon, hydrogen, oxygen etc., contains in addition the elements such as a small amount of nitrogen, phosphorus, potassium, calcium, magnesium, manganese, zinc and iron.Therefore, Litchi exocarp carbon content is large, ash content massfraction is low, is the high quality raw material of preparing micron particles gac.
China is the large lichee of the first in the world producing country, mainly concentrate on 9 provinces (district) such as Guangdong, Guangxi, Fujian, Hainan, Taiwan, Sichuan, Yunnan, Guizhou and Zhejiang, cultivated area and output account for respectively 80% and 75% of world's lichee total area and ultimate production, all occupy first place in the world.2009, China's lichee cultivated area and output are about respectively 55.7 ten thousand hectares and 169.6 ten thousand tons, wherein Guangdong, Guangxi, Fujian, Hainan, etc. lichee cultivated area and the annual production summation of 4 provinces (district) account for China's lichee total cultivated area and the more than 98% of ultimate production.Cultivated area still has growth at present.In addition,, except China, lichee is also cultivated as Queensland state, the Mauritius etc. of India, Thailand, South Africa, Australia by other tropical south subtropics countries (area) in the world.Litchi exocarp is the exocarp of lichee, accounts for 16% of lichee quality, approximately produces every year the Litchi exocarp of 270,000 tons.The productive rate that agriculture business by product is prepared gac is approximately 25 ~ 50%, and the Litchi exocarp of 270,000 tons/year can be prepared tens thousand of tons/year of gacs (being 20% by utilization ratio), and this output is several times as much as the annual production of current gac factory of China.Therefore; prepare gac take the sufficient Litchi exocarp of originating as raw material, not only can improve lichee added value of product, economize on resources and protection of the environment, but also can promote the development of agriculture business; be expected to for increasing peasant income produce good economic benefit and social value, can phase suitability for industrialized production.
Summary of the invention
The object of the invention is to be to provide a kind of micron particles gac of preparing with Litchi exocarp and preparation method thereof.
This object of the present invention and other object will be further reflected and elaborated by the following detailed description and explanation.
In the micron particles gac of preparing at the present invention's Litchi exocarp used; described Litchi exocarp is through clean, dry exocarp; be irregular cracking; surface russet; have most little strumaes, inner face is smooth, dark-brown; thin keratin and crisp is mainly a kind of abundant Mierocrystalline cellulose and multicomponent mixture of xylogen of containing.
The preparation method of micron particles gac prepared by the present invention's Litchi exocarp used, comprises following pre-treatment, pulverizing, dipping, dry, charing, activation, washing and drying and other steps.
A) produce the canned litchi time institute waste Litchi exocarp getting off that stripped off as raw material take canning factory, through clean, natural drying is air-dry or 70 ~ 100
oafter C heated and stirred is dried, with jet vortex turbulence mill, be crushed to the particle that particle diameter is 0.4～0.9 mm size;
B) be that 40 ~ 75% phosphoric acid qualities are than being 1:(0.5 ~ 2 by Litchi exocarp and massfraction) stir dipping 1 ~ 5 h, after making it fully expanded, evaporation concentration partial solvent water becomes mud thing;
C) above-mentioned dipping, Litchi exocarp mud thing after concentrated are loaded in crystal reaction tube, then reaction tubes are moved in tubular oven.Be under 99. 99% nitrogen protections in purity, adopt microwave irradiation, utilize the temperature control of KSJ temperature regulator, with 10
ocmin
1temperature rise rate be warming up to 150 ~ 250
ocarbonization 1 ~ 2 h within the scope of C, flow control is at 250 ~ 550 gmin
1inside pass into water vapour, then with 5
ocmin
1temperature rise rate be warming up to 300 ~ 500
oactivation 40 ~ 70 min, subsequently naturally cooling within the scope of C;
D) by above-mentioned refrigerant with hot water carry out rinsing to filtrate be neutral, dry after, obtain micron particles active carbon finished products.
The feature of finished product gac of preparation is as stated above: finished product gac belongs to micron particles gac, homogeneous, mechanical property is high, hole is flourishing, micropore-mesopore-macropore distributes concentrates in order, its specific surface area (S
bET) be 400 ~ 600 m
2g
1, micropore specific area is 305 ~ 550 m
2g
1, total pore volume (P/P
0=0.95) be 0.25 ~ 0.36 cm
3g
1, micro pore volume is 0.21 ~ 0.26 cm
3g
1, productive rate is 35 ~ 45%, ash content <0.18%, and iodine number is 210 ~ 389 mgg
1methylene blue adsorption value is 2.5 ~ 5.1 mL/0.1 g; adsorption rate to precious metal ions such as the heavy metal ion such as Hg (II), Cu (II), Ni (II) and Cr (VI) and Ag (I) and Au (III) is 93 ~ 99%; show good absorption property; its adsorptive power is 3 ~ 5 times of plain particles gac, is the favourable absorption agent that a kind of applicable heavy metal and precious metal reclaim.Meanwhile, good conductivity, shows the performance of high current charge-discharge, is the excellent activity material of manufacturing high-performance electric chemistry capacitor product.
Technique effect of the present invention is: Litchi exocarp is a kind of agriculture business waste material not yet effectively utilizing at present, sufficient raw, and preparation technology is simple, and preparation cost is low, is suitable for suitability for industrialized production.Utilize Litchi exocarp to prepare gac, turn waste into wealth, not only contribute to economize on resources and protection of the environment, and can improve the development of lichee added value of product, promotion agriculture business, for increasing peasant income produce good economic benefit and social value.
Accompanying drawing explanation
Fig. 1 is process flow sheet;
Fig. 2 is the N of case study on implementation 3 gained micron particles gacs
2adsorption-desorption isothermal map;
Fig. 3 is the pore size distribution curve figure of case study on implementation 3 gained micron particles gacs;
Fig. 4 is the scanning electron microscope (SEM) photograph of case study on implementation 3 gained micron particles gacs.
Embodiment
Below in conjunction with accompanying drawing 1,2,3,4 and case study on implementation, the present invention is described more specifically.From art technology general knowledge, the embodiment that the present invention can not depart from its spirit or essential feature by other realizes, and therefore, following embodiment, all just illustrates, and is not only.Within the scope of the present invention all or other be equal to change in scope of the present invention and be the present invention and comprise.
Case study on implementation 1
A) produce the canned litchi time institute waste Litchi exocarp getting off that stripped off as raw material take canned litchi factory, after clean, natural drying is air-dry, with jet vortex turbulence mill, be crushed to the particle that particle diameter is 0.7～0.9 mm size;
B) be that 45% phosphoric acid quality ratio is that 1:0.5 stirs dipping 4 h by Litchi exocarp and massfraction, after making it fully expanded, evaporation concentration partial solvent water becomes mud thing;
C) the Litchi exocarp mud thing of above-mentioned gained is loaded in crystal reaction tube, then reaction tubes is moved in tubular oven.Be under 99. 99% nitrogen protections in purity, adopt microwave irradiation, utilize the temperature control of KSJ temperature regulator, with 10
ocmin
1temperature rise rate be warming up to 150
ocarbonization 2 h when C, flow control is at 270 gmin
1inside pass into water vapour, then with 5
ocmin
1temperature rise rate be warming up to 300
owhen C, activate 65 min, subsequently naturally cooling;
D) by above-mentioned refrigerant with hot water carry out rinsing to filtrate be neutral, dry after, obtain micron particles active carbon finished products.
Case study on implementation 2
A) produce the canned litchi time institute waste Litchi exocarp getting off that stripped off as raw material take canned litchi factory, through clean, 70
oafter C heated and stirred is dried, with jet vortex turbulence mill, be crushed to the particle that particle diameter is 0.6～0.7 mm size;
B) be that 55% phosphoric acid quality ratio is that 1:1 stirs dipping 3 h by Litchi exocarp and massfraction, after making it fully expanded, evaporation concentration partial solvent water becomes mud thing;
C) the Litchi exocarp mud thing of above-mentioned gained is loaded in crystal reaction tube, then reaction tubes is moved in tubular oven.Be under 99. 99% nitrogen protections in purity, adopt microwave irradiation, utilize the temperature control of KSJ temperature regulator, with 10
ocmin
1temperature rise rate be warming up to 200
ocarbonization 1.5 h when C, flow control is at 350 gmin
1inside pass into water vapour, then with 5
ocmin
1temperature rise rate be warming up to 400
owhen C, activate 50 min, subsequently naturally cooling;
D) by above-mentioned refrigerant with hot water carry out rinsing to filtrate be neutral, dry after, obtain micron particles active carbon finished products.
Case study on implementation 3
A) produce the canned litchi time institute waste Litchi exocarp getting off that stripped off as raw material take canned litchi factory, through clean, natural drying is air-dry or 100
oafter C heated and stirred is dried, with jet vortex turbulence mill, be crushed to the particle that particle diameter is 0.4～0.5 mm size;
B) be that 70% phosphoric acid quality ratio is that 1:2 stirs dipping 2 h by Litchi exocarp and massfraction, after making it fully expanded, evaporation concentration partial solvent water becomes mud thing;
C) the Litchi exocarp mud thing of above-mentioned gained is loaded in crystal reaction tube, then reaction tubes is moved in tubular oven.Be under 99. 99% nitrogen protections in purity, adopt microwave irradiation, utilize the temperature control of KSJ temperature regulator, with 10
ocmin
1temperature rise rate be warming up to 250
ocarbonization 2 h when C, flow control is at 500 gmin
1inside pass into water vapour, then with 5
ocmin
1temperature rise rate be warming up to 500
oactivation 45 min, subsequently naturally cooling within the scope of C;
D) by above-mentioned refrigerant with hot water carry out rinsing to filtrate be neutral, dry after, obtain micron particles active carbon finished products.Its test result parameter and characteristic curve are if following table 1 is with as shown in Fig. 1,2,3.
The characteristic parameter of gac prepared by table 1 case study on implementation 3 is as follows
a
a S BET,?BET?specific?surface?area;?
S mic,?micropore?surface?area;?
S ext,?mesopore?surface?area;?
V tot,?total?pore?volume;?
V mic,?micropore?volume;?D
av,?adsorption?average?pore?diameter?(4V/A?by?BET)?。
Claims (4)
1. a granulated active carbon of preparing with Litchi exocarp, it is characterized in that prepared gac homogeneous, hole is flourishing, specific surface area (S
bET) be 400 ~ 600 m
2g
1, micropore specific area is 305 ~ 550 m
2g
1, total pore volume (P/P
0=0.95) be 0.25 ~ 0.36 cm
3g
1, micro pore volume is 0.21 ~ 0.26 cm
3g
1.
2. the granulated active carbon of preparing with Litchi exocarp according to claim 1, the granularity that it is characterized in that described gac is that micron order, mechanical property are high, iodine number is 210 ~ 389 mgg
1methylene blue adsorption value is 2.5 ~ 5.1 mL/0.1 g; adsorption rate to precious metal ions such as the heavy metal ion such as Hg (II), Cu (II), Ni (II) and Cr (VI) and Ag (I) and Au (III) is 93 ~ 99%; show good absorption property; its adsorptive power is 3 ~ 5 times of plain particles gac, is the favourable absorption agent that a kind of applicable heavy metal and precious metal reclaim.
3. the granulated active carbon of preparing with Litchi exocarp according to claim 1; micropore-mesopore-large the pore distribution concentration that it is characterized in that described gac is orderly; the features such as ash content low (<0.18%) and good conductivity; showing the performance of high current charge-discharge, is the excellent activity material of manufacturing high-performance electric chemistry capacitor product.
4. a preparation method for the micron particles gac of preparing with Litchi exocarp claimed in claim 1, its feature is specifically Litchi exocarp first air-dry through pre-treatment, natural drying or 70 ~ 100
oafter C heated and stirred is dried, with jet vortex turbulence mill, be crushed to the particle that particle diameter is 0.4 ~ 0.9 mm size; Then be that 40 ~ 75% phosphoric acid qualities are than being 1:(0.5 ~ 2 by Litchi exocarp and massfraction) stir dipping 1 ~ 5 h, after making it fully expanded, evaporation concentration partial solvent water becomes mud thing; Above-mentioned dipping, Litchi exocarp mud thing after concentrated being loaded in crystal reaction tube, then reaction tubes being moved in tubular oven, is under 99.99% nitrogen protection in purity, adopts microwave irradiation, utilizes the temperature control of KSJ temperature regulator, with 10
ocmin
1temperature rise rate be warming up to 150 ~ 250
ocarbonization 1 ~ 2 h within the scope of C, flow control is at 250 ~ 550 gmin
1inside pass into water vapour, then with 5
ocmin
1temperature rise rate be warming up to 300 ~ 500
oactivation 40 ~ 70 min, subsequently naturally cooling within the scope of C; By above-mentioned refrigerant with hot water carry out rinsing to filtrate be neutral, dry after, obtain micron particles active carbon finished products.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410057871.7A CN103803549A (en) | 2014-02-20 | 2014-02-20 | Micron-sized granular active carbon prepared from litchi shells and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410057871.7A CN103803549A (en) | 2014-02-20 | 2014-02-20 | Micron-sized granular active carbon prepared from litchi shells and preparation method thereof |
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|---|---|
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ID=50701001
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| CN (1) | CN103803549A (en) |
Cited By (12)
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| CN104556027A (en) * | 2014-12-11 | 2015-04-29 | 惠州学院 | Method for preparing litchi seed activated carbon |
| CN105253885A (en) * | 2015-09-25 | 2016-01-20 | 昆明理工大学 | Comprehensive utilization and activation method of waste charcoal powder |
| CN105948044A (en) * | 2016-06-22 | 2016-09-21 | 赵常然 | Production technique of special activated carbon for wet-process phosphoric acid |
| CN106006606A (en) * | 2016-06-20 | 2016-10-12 | 湖州南浔展辉分子筛厂 | Method for preparing nitrogen carbon molecular sieve from apple pomace |
| CN107051389A (en) * | 2017-06-08 | 2017-08-18 | 湖北科技学院 | A kind of microwave carbonizing apparatus |
| CN107128912A (en) * | 2017-05-09 | 2017-09-05 | 亳州市恒顺生态科技有限公司 | A kind of preparation method of the Chinese medicine slag activated carbon of supported ion liquid |
| CN108975332A (en) * | 2018-07-19 | 2018-12-11 | 深圳市环球绿地新材料有限公司 | High rigidity active carbon, preparation method and use |
| CN109231758A (en) * | 2018-11-21 | 2019-01-18 | 山东省科学院新材料研究所 | A kind of modified sewage sludge absorbent charcoal heavy-metal adsorption material |
| CN109279959A (en) * | 2018-10-26 | 2019-01-29 | 华中农业大学 | Ultra micro straw charcoal base slow-release compound fertilizer and preparation method thereof |
| CN109482146A (en) * | 2018-11-21 | 2019-03-19 | 山东省科学院新材料研究所 | A kind of preparation method of modified sewage sludge absorbent charcoal heavy-metal adsorption material |
| CN109911896A (en) * | 2017-12-13 | 2019-06-21 | 贺州学院 | A kind of semen litchi method for preparation of active carbon through phosphoric acid activation |
| CN110126403A (en) * | 2019-05-22 | 2019-08-16 | 罗建军 | A kind of black brill activated carbon insoles of lichee and preparation method thereof |
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| CN104556027A (en) * | 2014-12-11 | 2015-04-29 | 惠州学院 | Method for preparing litchi seed activated carbon |
| CN105253885A (en) * | 2015-09-25 | 2016-01-20 | 昆明理工大学 | Comprehensive utilization and activation method of waste charcoal powder |
| CN105253885B (en) * | 2015-09-25 | 2017-08-11 | 昆明理工大学 | A kind of comprehensive utilization of discarded charcoal powder and activation method |
| CN106006606B (en) * | 2016-06-20 | 2019-02-01 | 浙江品创知识产权服务有限公司 | A method of nitrogen carbon molecular sieve is prepared by apple pomace |
| CN106006606A (en) * | 2016-06-20 | 2016-10-12 | 湖州南浔展辉分子筛厂 | Method for preparing nitrogen carbon molecular sieve from apple pomace |
| CN105948044A (en) * | 2016-06-22 | 2016-09-21 | 赵常然 | Production technique of special activated carbon for wet-process phosphoric acid |
| CN107128912A (en) * | 2017-05-09 | 2017-09-05 | 亳州市恒顺生态科技有限公司 | A kind of preparation method of the Chinese medicine slag activated carbon of supported ion liquid |
| CN107051389A (en) * | 2017-06-08 | 2017-08-18 | 湖北科技学院 | A kind of microwave carbonizing apparatus |
| CN109911896A (en) * | 2017-12-13 | 2019-06-21 | 贺州学院 | A kind of semen litchi method for preparation of active carbon through phosphoric acid activation |
| CN108975332A (en) * | 2018-07-19 | 2018-12-11 | 深圳市环球绿地新材料有限公司 | High rigidity active carbon, preparation method and use |
| CN108975332B (en) * | 2018-07-19 | 2020-07-24 | 深圳市环球绿地新材料有限公司 | High-hardness activated carbon, preparation method and application thereof |
| CN109279959A (en) * | 2018-10-26 | 2019-01-29 | 华中农业大学 | Ultra micro straw charcoal base slow-release compound fertilizer and preparation method thereof |
| CN109279959B (en) * | 2018-10-26 | 2021-07-30 | 华中农业大学 | Ultramicro straw carbon-based slow-release compound fertilizer and preparation method thereof |
| CN109231758A (en) * | 2018-11-21 | 2019-01-18 | 山东省科学院新材料研究所 | A kind of modified sewage sludge absorbent charcoal heavy-metal adsorption material |
| CN109482146A (en) * | 2018-11-21 | 2019-03-19 | 山东省科学院新材料研究所 | A kind of preparation method of modified sewage sludge absorbent charcoal heavy-metal adsorption material |
| CN109231758B (en) * | 2018-11-21 | 2021-10-08 | 山东省科学院新材料研究所 | Modified sludge activated carbon heavy metal adsorption material |
| CN109482146B (en) * | 2018-11-21 | 2021-10-08 | 山东省科学院新材料研究所 | Preparation method of modified sludge activated carbon heavy metal adsorption material |
| CN110126403A (en) * | 2019-05-22 | 2019-08-16 | 罗建军 | A kind of black brill activated carbon insoles of lichee and preparation method thereof |
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