CN1868874A - Active carbon using coal grass paste as raw material and its preparation method - Google Patents
Active carbon using coal grass paste as raw material and its preparation method Download PDFInfo
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- CN1868874A CN1868874A CN 200610200498 CN200610200498A CN1868874A CN 1868874 A CN1868874 A CN 1868874A CN 200610200498 CN200610200498 CN 200610200498 CN 200610200498 A CN200610200498 A CN 200610200498A CN 1868874 A CN1868874 A CN 1868874A
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Abstract
An activated carbon with large specific surface area and high adsorption and mechanical performance is prepared from coal and straw pulp made of wheat straw, rice straw, grass, reed, cane dregs, or bamboo through pre-treating, carbonizing and activating.
Description
Technical field: the present invention relates to a kind of manufacture method of gac, is the high grade activated carbon of raw material making and the method for preparation thereof with the coal straw pulp particularly.
Background technology: the unit of the applicant before merging colleges and universities: Guizhou University of Technology once applied for patent " making process of active carbon with coal water slurry " application number on December 12nd, 2002: 021280398, it discloses the coal water slurry manufacturing process of active carbon that a kind of usefulness has been added the some amount xylogen, and this method has enlarged the source of raw materials for production when can making gac.But it is raw material that this method needs xylogen, and production method is comparatively complicated, has therefore also improved production cost.
Mierocrystalline cellulose, hemicellulose and xylogen three are the main components that constitutes plant (comprising trees and grass) body, because photosynthesis will have more than one hundred million tons plant to produce every year, they are renewable resourcess of enormous amount.
Obviously, xylogen only is the part of plant body, and the xylogen on the market all derives from the mashing off waste liquid of paper industry, and such as the vitriol xylogen, it is the product behind " black liquor " sour chromatography." black liquor " is startling to the destruction of environmental ecology! For the needs of environment protection, the slip house of middle small paper mill has been closed, stopped in country, and " black liquor " of not going up scale pulping and paper-making factory concentrates " alkali recovery " technical finesse.At present, the price of industrial lignin (kraft lignin or alkali lignin) is about 800～1000 yuan/ton, and is more expensive than coal.
And straw or like vegetable is thick on the ground, and the source is abundant, and is cheap.If with coal straw pulp preparing active carbon, raw material sources are wide, are not limited by raw materials market, price will be significantly less than the gac of coal water slurry (coal and xylogen preparation) preparation.Certainly, also just different on technology.
In those early years, the gac physical strength of producing with stalk is low merely, and quantity is few, is subjected to condition restriction, and how impossible scale operation is eliminated.
If also can prepare the fine gac with the sour precipitating Processing of Preparation of straw pulp " black liquor " xylogen, the patented technology of utilizing the applicant to obtain again, but this method more complicated, and cost is too high, also pollutes the environment.
Summary of the invention: the object of the present invention is to provide a kind of gac that adopts coal and straw or like vegetable making and preparation method thereof, utilize coal and wheat straw, straw, dogstail, reed, bagasse, bamboo, and straw or like vegetable such as all stalk class agricultural byproducts is directly made gac, enlarged the source of raw material, reduce production cost simultaneously, avoided the pollution of environment.
The present invention constitutes like this: with the coal straw pulp is the gac that raw material is made, and calculate according to weight percent: it is prepared from by the coal dust of 10-90% and the straw or like vegetable powder of 90-10%, outward appearance darkly, brown, its iodine sorption value is more than 1700mg/g.
Concrete: as to calculate according to weight percent: it is prepared into the gac of routine by the straw or like vegetable powder of the coal dust of 20-80% and 80-20%, outward appearance darkly, brown.
Say accurately: calculate according to weight: it is prepared into conventional gac by 25 kilograms of coal dusts and 75 kilograms of straw or like vegetable powder, outward appearance darkly, brown, used coal dust is the powder that obtains with wheat straw, straw, dogstail, reed, bagasse or bamboo and the pulverizing of stalk class agricultural byproducts for pulverize powder, the straw or like vegetable powder obtain with hard coal.
Experiment by the applicant finds that the used straw or like vegetable powder of the present invention is preferably the product that obtains with after bagasse or the bamboo pulverizing.This be because: the content of ash content is minimum in bagasse or the bamboo, and the ash oontent that high grade activated carbon requires is less than 10%; Can reach this requirement with bagasse or bamboo.
With the coal straw pulp is that raw material is made process of active carbon: it adopts following coal dust of 200 orders and straw or like vegetable powder to add the mixed coal straw pulp that gets of water, then through obtaining activated carbon product after pre-treatment, air-dry moulding, activation, rinsing, the drying.
Concrete preparation method:
A, the coal dust below 200 orders is mixed with the straw or like vegetable powder, in material, add the water of 10% (by weight) then and stir, obtain the coal straw pulp;
B, with the pre-treatment of coal straw pulp deliming, and control coal straw pulp ash content is less than 10%;
C, the coal straw pulp that will handle are washed with water to after pH is 6, add activator, and moulding is air-dry;
D, the air-dry thing of gained is put into activation furnace activate: under nitrogen protection, be warming up to 800 ℃, be incubated 1 hour by the heat-up rate of 5～10 ℃/min;
After the product cooling after e, the activation, being washed with water to pH is 6, and oven dry obtains activated carbon product.
Activation adopts method chemistry, physics or chemistry and physical bond to carry out among the present invention.Because these methods all are technology, the method for this field routine.
The activator that adds is compound or their combinations such as potassium hydroxide, zinc chloride, phosphoric acid and phosphoric acid salt; Experimental results show that best activator is a potassium hydroxide.
The straw or like vegetable that mixes usefulness in the preparation with coal dust should be dry, mix with coal dust behind the conventional abrasive dust again.This drying, abrasive dust are conventional method and technology.
The present invention adopts hard coal and straw or like vegetable to make gac, and straw or like vegetable can use wheat straw, straw, dogstail, reed, bagasse, bamboo, and all stalk class agricultural byproducts etc.Hard coal and various straw or like vegetable are the resource of China's abundant, and be with low cost, wide material sources.Adopt agricultural byproducts as raw material, also improved their utility value.Therefore compare with prior art, the source with raw material is wider, has further reduced advantages such as production cost.The patent 021280398 of having authorized with us compares, raw material expands to straw plant from xylogen, it is more wide to originate, the way of control ash content is simpler, economic benefit will be better, the quality of activated carbon product will improve greatly, can reach more than the 1700mg/g such as the iodine sorption value that reflects gac specific surface size, and this is the innovative point of the application's patent.
Embodiment:
Embodiments of the invention 1: 25 kilograms of coal dusts, 75 kilograms in bamboo powder
A, the coal dust below 200 orders is mixed with the bamboo powder, the water that adds total weight of material 10% then stirs, and obtains the coal straw pulp;
B, with the pre-treatment of coal straw pulp deliming, and control coal straw pulp ash content is less than 10%;
C, the coal straw pulp that will handle are washed with water to after pH is 6, add potassium hydroxide and make activator, and moulding is air-dry;
D, the air-dry thing of gained is put into activation furnace activate: under nitrogen protection, be warming up to 800 ℃, be incubated 1 hour by the heat-up rate of 5～10 ℃/min;
After the product cooling after e, the activation, being washed with water to pH is 6, and oven dry obtains activated carbon product.
Embodiments of the invention 2: 20 kilograms of coal dusts, 80 kilograms in bagasse powder
A, the coal dust below 200 orders is mixed with the bagasse powder, the water that adds total weight of material 10% then stirs, and obtains the coal straw pulp;
B, with the pre-treatment of coal straw pulp deliming, and control coal straw pulp ash content is less than 10%;
C, the coal straw pulp that will handle are washed with water to after pH is 6, add zinc chloride and make activator, and moulding is air-dry;
D, the air-dry thing of gained is put into activation furnace activate: under nitrogen protection, be warming up to 800 ℃, be incubated 1 hour by the heat-up rate of 5～10 ℃/min;
After the product cooling after e, the activation, being washed with water to pH is 6, and oven dry obtains activated carbon product.
Embodiments of the invention 3: 80 kilograms of coal dusts, 20 kilograms of barley seeding foods
A, the coal dust below 200 orders is mixed with barley seeding food, the water that adds total weight of material 10% then stirs, and obtains the coal straw pulp;
B, with the pre-treatment of coal straw pulp deliming, and control coal straw pulp ash content is less than 10%;
C, the coal straw pulp that will handle are washed with water to after pH is 6, add phosphoric acid and make activator, and moulding is air-dry;
D, the air-dry thing of gained is put into activation furnace activate: under nitrogen protection, be warming up to 800 ℃, be incubated 1 hour by the heat-up rate of 5～10 ℃/min;
After the product cooling after e, the activation, being washed with water to pH is 6, and oven dry obtains activated carbon product.
Embodiments of the invention 4: 10 kilograms of coal dusts, 90 kilograms in straw powder
A, the coal dust below 200 orders is mixed with the straw powder, the water that adds total weight of material 10% then stirs, and obtains the coal straw pulp;
B, with the pre-treatment of coal straw pulp deliming, and control coal straw pulp ash content is less than 10%;
C, the coal straw pulp that will handle are washed with water to after pH is 6, add phosphoric acid salt and make activator, and moulding is air-dry;
D, the air-dry thing of gained is put into activation furnace activate: under nitrogen protection, be warming up to 800 ℃, be incubated 1 hour by the heat-up rate of 5～10 ℃/min;
After the product cooling after e, the activation, being washed with water to pH is 6, and oven dry obtains activated carbon product.
Embodiments of the invention 5: 90 kilograms of coal dusts, 10 kilograms in dogstail powder
A, the coal dust below 200 orders is mixed with the dogstail powder, the water that adds total weight of material 10% then stirs, and obtains the coal straw pulp;
B, with the pre-treatment of coal straw pulp deliming, and control coal straw pulp ash content is less than 10%;
C, the coal straw pulp that will handle are washed with water to after pH is 6, add potassium hydroxide and zinc chloride and make activator, and moulding is air-dry;
D, the air-dry thing of gained is put into activation furnace activate: under nitrogen protection, be warming up to 800 ℃, be incubated 1 hour by the heat-up rate of 5～10 ℃/min;
After the product cooling after e, the activation, being washed with water to pH is 6, and oven dry obtains activated carbon product.
Embodiments of the invention 6: 50 kilograms of coal dusts, 50 kilograms of reed powders
A, the coal dust below 200 orders is mixed with reed powder, the water that adds total weight of material 10% then stirs, and obtains the coal straw pulp;
B, with the pre-treatment of coal straw pulp deliming, and control coal straw pulp ash content is less than 10%;
C, the coal straw pulp that will handle are washed with water to after pH is 6, add phosphoric acid and phosphoric acid salt and make activator, and moulding is air-dry;
D, the air-dry thing of gained is put into activation furnace activate: under nitrogen protection, be warming up to 800 ℃, be incubated 1 hour by the heat-up rate of 5～10 ℃/min;
After the product cooling after e, the activation, being washed with water to pH is 6, and oven dry obtains activated carbon product.
Claims (9)
1. be the gac that raw material is made with the coal straw pulp, it is characterized in that: calculate according to weight percent: it is prepared from by the coal dust of 10-90% and the straw or like vegetable powder of 90-10%, outward appearance darkly, brown, the iodine sorption value of gac is more than 1700mg/g.
2. described according to claim 1 is the gac that raw material is made with the coal straw pulp, it is characterized in that: calculates according to weight percent: it is prepared into the gac of routine by the straw or like vegetable powder of the coal dust of 20-80% and 80-20%, outward appearance darkly, brown.
According to claim 1 or 2 described be the gac that raw material is made with the coal straw pulp, it is characterized in that: calculate according to weight: it is prepared into conventional gac by 25 kilograms of coal dusts and 75 kilograms of straw or like vegetable powder, outward appearance darkly, brown, used coal dust is the powder that obtains with wheat straw, straw, dogstail, reed, bagasse or bamboo and the pulverizing of stalk class agricultural byproducts for pulverize powder, the straw or like vegetable powder obtain with hard coal.
4. described according to claim 3 is the gac that raw material is made with the coal straw pulp, it is characterized in that: the product of used straw or like vegetable powder for obtaining after pulverizing with bagasse or bamboo.
As claim 1,2 or 3 described be that raw material is made process of active carbon with the coal straw pulp, it is characterized in that: it adopts following coal dust of 200 orders and straw or like vegetable powder to add the mixed coal straw pulp that gets of water, then through obtaining activated carbon product after pre-treatment, air-dry moulding, activation, rinsing, the drying.
6. according to claim 5 is that raw material is made process of active carbon with the coal straw pulp, it is characterized in that:
A, the coal dust below 200 orders is mixed with the straw or like vegetable powder, the water that adds total weight of material 10% then stirs, and obtains the coal straw pulp;
B, with the pre-treatment of coal straw pulp deliming, and control coal straw pulp ash content is less than 10%;
C, the coal straw pulp that will handle are washed with water to after pH is 6, add activator, and moulding is air-dry;
D, the air-dry thing of gained is put into activation furnace activate: under nitrogen protection, be warming up to 800 ℃, be incubated 1 hour by the heat-up rate of 5～10 ℃/min;
After the product cooling after e, the activation, being washed with water to pH is 6, and oven dry obtains activated carbon product.
According to claim 5 or 6 described be that raw material is made process of active carbon with the coal straw pulp, it is characterized in that: activation adopts method chemistry, physics or chemistry and physical bond to carry out.
8. according to described in the claim 6 being that raw material is made process of active carbon with the coal straw pulp, it is characterized in that: the activator of interpolation is compound or their combinations such as potassium hydroxide, zinc chloride, phosphoric acid and phosphoric acid salt.
According to claim 5 or 6 described be that raw material is made process of active carbon with the coal straw pulp, it is characterized in that: the straw or like vegetable that mixes usefulness with coal dust should drying, mix with coal dust behind the conventional abrasive dust again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200610200498 CN1868874A (en) | 2005-06-21 | 2006-05-26 | Active carbon using coal grass paste as raw material and its preparation method |
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| CN200510003110 | 2005-06-21 | ||
| CN200510003110.4 | 2005-06-21 | ||
| CN 200610200498 CN1868874A (en) | 2005-06-21 | 2006-05-26 | Active carbon using coal grass paste as raw material and its preparation method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104045084A (en) * | 2014-06-25 | 2014-09-17 | 无锡市崇安区科技创业服务中心 | Activated carbon and preparation method thereof |
| CN104163426A (en) * | 2014-08-18 | 2014-11-26 | 深圳市环境科学研究院 | Active carbon preparation method and giant reed active carbon |
| CN105858651A (en) * | 2016-03-31 | 2016-08-17 | 覃淑兰 | A preparing method of activated carbon |
| CN106006640A (en) * | 2016-07-26 | 2016-10-12 | 安徽香杨林业有限公司 | Straw-based activated carbon preparation process |
| CN106629712A (en) * | 2016-12-30 | 2017-05-10 | 中南大学 | Method for preparing activated carbon from mixture of coal and biomass |
| CN106755258A (en) * | 2017-01-20 | 2017-05-31 | 福建农林大学 | A kind of method of comprehensive utilization of energy grass and marine alga slag |
| CN109911895A (en) * | 2019-02-25 | 2019-06-21 | 合肥学院 | A kind of preparation method of tobacco-based modified activated carbon |
| CN111924845A (en) * | 2020-07-15 | 2020-11-13 | 山东省科学院能源研究所 | System and method for preparing activated carbon material by using quick activation method without carbon emission |
-
2006
- 2006-05-26 CN CN 200610200498 patent/CN1868874A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104045084A (en) * | 2014-06-25 | 2014-09-17 | 无锡市崇安区科技创业服务中心 | Activated carbon and preparation method thereof |
| CN104163426A (en) * | 2014-08-18 | 2014-11-26 | 深圳市环境科学研究院 | Active carbon preparation method and giant reed active carbon |
| CN105858651A (en) * | 2016-03-31 | 2016-08-17 | 覃淑兰 | A preparing method of activated carbon |
| CN106006640A (en) * | 2016-07-26 | 2016-10-12 | 安徽香杨林业有限公司 | Straw-based activated carbon preparation process |
| CN106629712A (en) * | 2016-12-30 | 2017-05-10 | 中南大学 | Method for preparing activated carbon from mixture of coal and biomass |
| CN106629712B (en) * | 2016-12-30 | 2019-03-15 | 中南大学 | A method of active carbon is prepared using the mixture of coal and biomass |
| CN106755258A (en) * | 2017-01-20 | 2017-05-31 | 福建农林大学 | A kind of method of comprehensive utilization of energy grass and marine alga slag |
| CN109911895A (en) * | 2019-02-25 | 2019-06-21 | 合肥学院 | A kind of preparation method of tobacco-based modified activated carbon |
| CN109911895B (en) * | 2019-02-25 | 2023-01-31 | 合肥学院 | Preparation method of tobacco-based modified activated carbon |
| CN111924845A (en) * | 2020-07-15 | 2020-11-13 | 山东省科学院能源研究所 | System and method for preparing activated carbon material by using quick activation method without carbon emission |
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