CN102786052A - Method for preparation of activated carbon through rice hull desilication - Google Patents
Method for preparation of activated carbon through rice hull desilication Download PDFInfo
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- CN102786052A CN102786052A CN2012102464088A CN201210246408A CN102786052A CN 102786052 A CN102786052 A CN 102786052A CN 2012102464088 A CN2012102464088 A CN 2012102464088A CN 201210246408 A CN201210246408 A CN 201210246408A CN 102786052 A CN102786052 A CN 102786052A
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- rice husk
- active carbon
- desiliconization
- prepares process
- activated carbon
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Abstract
The invention discloses a method for preparation of activated carbon through rice hull desilication. The method consists of: drying rice hulls, crushing them to a particle size of less than 5mm, mixing the particles with a zinc chloride solution with a concentration of 40-60wt% according to an impregnation ratio of 1:1.0-1:3.0, then putting the mixture in a covered crucible to soak at room temperature for 16h, raising the temperature to 450-650DEG C in a muffle furnace, carrying out activation for 45-90min, conducting cooling, performing washing to neutral, then carrying out drying, crushing and sieving till 200 meshes. The rice hull activated carbon prepared by the method has excellent adsorption performance.
Description
Technical field
The invention belongs to the activated carbon technology field, relate to the preparation of gac, be specifically related to a kind of rice husk desiliconization and prepare process of active carbon.
Background technology
Gac is a kind of porous carbon materials, has highly developed pore texture and huge specific surface area, characteristics such as high adsorption capacity, chemicalstability is good, physical strength is high, the easy regeneration in use inefficacy back.As a kind of good sorbent material and support of the catalyst, be widely used in purification, the solvent recuperation of liquids and gases and make support of the catalyst etc., along with attention day by day to environmental issue.
Rice husk is the agriculture byproduct that certain carbon content is arranged, and China has rich in natural resources, but its ash oontent is too high, handles without falling ash, is difficult to produce high-quality gac.
Summary of the invention
In order to overcome the deficiency of prior art, the invention provides a kind of rice husk desiliconization and prepare process of active carbon, with the rice husk raw material, adopt zinc chloride activation method to prepare wood activated charcoal.
< 5mm mixes by the impregnating ratio of 1:1.0～1:3.0 with the liquor zinci chloridi of concentration 40～60wt%, places crucible soak at room temperature 16h with cover with being crushed to grain diameter after the rice husk oven dry; In muffle furnace, be warming up to 450～650 ℃; Activation 45～90min, cooling, washing is to neutral; Drying, crushing screening to 200 order.
Preferred activation temperature is 500～650 ℃, and further preferred activation temperature is 550 ℃.
Preferred impregnating ratio is 1:1.5～1:3.0, and further preferred impregnating ratio is 1:2.5.
Preferred soaking time is 60min.
Preferred liquor zinci chloridi concentration is 55wt%.
Rice hull active carbon through method preparation of the present invention has splendid absorption property.
Embodiment
The used rice husk of the present invention is from Flos Bombacis Malabarici Yanbian rice source mill, and used zinc chloride is an analytical pure in the middle of the test.
Embodiment 1
< 5mm mixes with the liquor zinci chloridi 300g of concentration 40wt%, places crucible soak at room temperature 16h with cover with being crushed to grain diameter after the oven dry of 100g rice husk; In muffle furnace, be warming up to 450 ℃, activation 90min, cooling; Washing is to neutrality, drying, crushing screening to 200 order.
Embodiment 2
< 5mm mixes with the liquor zinci chloridi 200g of concentration 50wt%, places crucible soak at room temperature 16h with cover with being crushed to grain diameter after the oven dry of 100g rice husk; In muffle furnace, be warming up to 550 ℃, activation 70min, cooling; Washing is to neutrality, drying, crushing screening to 200 order.
Embodiment 3
< 5mm mixes with the liquor zinci chloridi 100g of concentration 60wt%, places crucible soak at room temperature 16h with cover with being crushed to grain diameter after the oven dry of 100g rice husk; In muffle furnace, be warming up to 650 ℃, activation 45min, cooling; Washing is to neutrality, drying, crushing screening to 200 order.
Embodiment 4
< 5mm mixes with the liquor zinci chloridi 150g of concentration 55wt%, places crucible soak at room temperature 16h with cover with being crushed to grain diameter after the oven dry of 100g rice husk; In muffle furnace, be warming up to 550 ℃, activation 60min, cooling; Washing is to neutrality, drying, crushing screening to 200 order.
Embodiment 5
< 5mm mixes with the liquor zinci chloridi 200g of concentration 50wt%, places crucible soak at room temperature 16h with cover with being crushed to grain diameter after the oven dry of 100g rice husk; In muffle furnace, be warming up to 600 ℃, activation 50min, cooling; Washing is to neutrality, drying, crushing screening to 200 order.
Embodiment 6
< 5mm mixes with the liquor zinci chloridi 250g of concentration 55wt%, places crucible soak at room temperature 16h with cover with being crushed to grain diameter after the oven dry of 100g rice husk; In muffle furnace, be warming up to 550 ℃, activation 60min, cooling; Washing is to neutrality, drying, crushing screening to 200 order.
Rice hull active carbon through method preparation of the present invention has splendid absorption property.
Claims (7)
1. a rice husk desiliconization prepares process of active carbon, may further comprise the steps:
< 5mm mixes by the impregnating ratio of 1:1.0～1:3.0 with the liquor zinci chloridi of concentration 40～60wt%, places crucible soak at room temperature 16h with cover with being crushed to grain diameter after the rice husk oven dry; In muffle furnace, be warming up to 450～650 ℃; Activation 45～90min, cooling, washing is to neutral; Drying, crushing screening to 200 order.
2. rice husk desiliconization according to claim 1 prepares process of active carbon, it is characterized in that: described activation temperature is 500～650 ℃.
3. rice husk desiliconization according to claim 2 prepares process of active carbon, it is characterized in that: described activation temperature is 550 ℃.
4. rice husk desiliconization according to claim 1 prepares process of active carbon, it is characterized in that: described impregnating ratio is 1:1.5～1:3.0.
5. rice husk desiliconization according to claim 4 prepares process of active carbon, it is characterized in that: described impregnating ratio is 1:2.5.
6. rice husk desiliconization according to claim 1 prepares process of active carbon, it is characterized in that: described soaking time is 60min.
7. rice husk desiliconization according to claim 1 prepares process of active carbon, it is characterized in that: described liquor zinci chloridi concentration is 55wt%.
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104779078A (en) * | 2015-04-03 | 2015-07-15 | 安徽江威精密制造有限公司 | Carbon nanotube/modified straw composite electrode material and preparation method thereof |
| CN104779065A (en) * | 2015-04-03 | 2015-07-15 | 安徽江威精密制造有限公司 | Straw-based supercapacitor electrode with high volumetric specific capacitance and preparation method thereof |
| CN104779077A (en) * | 2015-04-03 | 2015-07-15 | 安徽江威精密制造有限公司 | Straw-based electrode material with high mechanical stability and preparation method of electrode material |
| CN104795246A (en) * | 2015-04-03 | 2015-07-22 | 安徽江威精密制造有限公司 | Composite electrode material with excellent electric storage performance and method for manufacturing composite electrode material |
| CN104821236A (en) * | 2015-04-03 | 2015-08-05 | 安徽江威精密制造有限公司 | Electrode material improving battery capacity of supercapacitor and preparation method thereof |
| CN104821239A (en) * | 2015-04-03 | 2015-08-05 | 安徽江威精密制造有限公司 | Silicon-doped straw-based charcoal composite electrode material and preparation method thereof |
| CN104821234A (en) * | 2015-04-03 | 2015-08-05 | 安徽江威精密制造有限公司 | High-aluminum powder/modified straw composite electrode material and preparation method thereof |
| CN104851609A (en) * | 2015-04-03 | 2015-08-19 | 安徽江威精密制造有限公司 | Straw-based supercapacitor electrode with high chemical stability and preparation method thereof |
| CN104851612A (en) * | 2015-04-03 | 2015-08-19 | 安徽江威精密制造有限公司 | Composite electrode material improving current discharge performance and preparation method thereof |
| CN104851608A (en) * | 2015-04-03 | 2015-08-19 | 安徽江威精密制造有限公司 | Straw-based nano carbon composite electrode material and preparation method thereof |
| CN104851611A (en) * | 2015-04-03 | 2015-08-19 | 安徽江威精密制造有限公司 | Low-resistance straw-based electrode material and preparation method thereof |
| CN104851614A (en) * | 2015-04-03 | 2015-08-19 | 安徽江威精密制造有限公司 | Doped lithium manganese iron phosphate-straw-based carbon composite electrode material and preparation method thereof |
| CN104851602A (en) * | 2015-04-03 | 2015-08-19 | 安徽江威精密制造有限公司 | Straw-based composite material convenient to process and preparation method thereof |
| CN104867691A (en) * | 2015-04-03 | 2015-08-26 | 安徽江威精密制造有限公司 | Indium-tin-oxide-doped straw based carbon composite electrode material and preparation method thereof |
| CN104867693A (en) * | 2015-04-03 | 2015-08-26 | 安徽江威精密制造有限公司 | Environment-friendly and pollution-free composite electrode material and preparation method thereof |
| CN104867694A (en) * | 2015-04-03 | 2015-08-26 | 安徽江威精密制造有限公司 | High-porosity long hole straw based composite electrode material and preparation method thereof |
| CN104867690A (en) * | 2015-04-03 | 2015-08-26 | 安徽江威精密制造有限公司 | Polyaniline-straw based active carbon electrode composite material and preparation method thereof |
| CN104882294A (en) * | 2015-04-03 | 2015-09-02 | 安徽江威精密制造有限公司 | Porous straw-based electrode material with high specific surface area and method of preparation |
| CN109809405A (en) * | 2019-03-15 | 2019-05-28 | 合肥学院 | A kind of preparation method of honey peach peach-pit matrix activated carbon |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779078A (en) * | 2015-04-03 | 2015-07-15 | 安徽江威精密制造有限公司 | Carbon nanotube/modified straw composite electrode material and preparation method thereof |
| CN104779065A (en) * | 2015-04-03 | 2015-07-15 | 安徽江威精密制造有限公司 | Straw-based supercapacitor electrode with high volumetric specific capacitance and preparation method thereof |
| CN104779077A (en) * | 2015-04-03 | 2015-07-15 | 安徽江威精密制造有限公司 | Straw-based electrode material with high mechanical stability and preparation method of electrode material |
| CN104795246A (en) * | 2015-04-03 | 2015-07-22 | 安徽江威精密制造有限公司 | Composite electrode material with excellent electric storage performance and method for manufacturing composite electrode material |
| CN104821236A (en) * | 2015-04-03 | 2015-08-05 | 安徽江威精密制造有限公司 | Electrode material improving battery capacity of supercapacitor and preparation method thereof |
| CN104821239A (en) * | 2015-04-03 | 2015-08-05 | 安徽江威精密制造有限公司 | Silicon-doped straw-based charcoal composite electrode material and preparation method thereof |
| CN104821234A (en) * | 2015-04-03 | 2015-08-05 | 安徽江威精密制造有限公司 | High-aluminum powder/modified straw composite electrode material and preparation method thereof |
| CN104851609A (en) * | 2015-04-03 | 2015-08-19 | 安徽江威精密制造有限公司 | Straw-based supercapacitor electrode with high chemical stability and preparation method thereof |
| CN104851612A (en) * | 2015-04-03 | 2015-08-19 | 安徽江威精密制造有限公司 | Composite electrode material improving current discharge performance and preparation method thereof |
| CN104851608A (en) * | 2015-04-03 | 2015-08-19 | 安徽江威精密制造有限公司 | Straw-based nano carbon composite electrode material and preparation method thereof |
| CN104851611A (en) * | 2015-04-03 | 2015-08-19 | 安徽江威精密制造有限公司 | Low-resistance straw-based electrode material and preparation method thereof |
| CN104851614A (en) * | 2015-04-03 | 2015-08-19 | 安徽江威精密制造有限公司 | Doped lithium manganese iron phosphate-straw-based carbon composite electrode material and preparation method thereof |
| CN104851602A (en) * | 2015-04-03 | 2015-08-19 | 安徽江威精密制造有限公司 | Straw-based composite material convenient to process and preparation method thereof |
| CN104867691A (en) * | 2015-04-03 | 2015-08-26 | 安徽江威精密制造有限公司 | Indium-tin-oxide-doped straw based carbon composite electrode material and preparation method thereof |
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| CN104867690A (en) * | 2015-04-03 | 2015-08-26 | 安徽江威精密制造有限公司 | Polyaniline-straw based active carbon electrode composite material and preparation method thereof |
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| CN109809405A (en) * | 2019-03-15 | 2019-05-28 | 合肥学院 | A kind of preparation method of honey peach peach-pit matrix activated carbon |
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Application publication date: 20121121 |