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Biomass powdered activated carbon prepared from lychee seeds and preparation method thereof

A technology of powdered activated carbon and lychee core, which is applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of few deep processing and effective comprehensive utilization, and achieve good economic benefits, strong adsorption capacity, and resource protection. Effect

Inactive Publication Date: 2014-05-21
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, lychee mainly eats its pulp directly, and the stone after removing the peel and fleshy aril (accounting for 16% to 22% of the weight, about 270,000 to 370,000 tons per year), that is, the litchi stone (Semen Litchi; Lychee seed) except for a small amount of traditional Chinese medicine for the treatment of testicular swelling and pain, diabetes, cold hernia abdominal pain, dysmenorrhea and postpartum abdominal pain, etc., for a long time, most of them are directly used as fertilizer or discarded, and rarely undergo deep processing and effective comprehensive utilization

Method used

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  • Biomass powdered activated carbon prepared from lychee seeds and preparation method thereof
  • Biomass powdered activated carbon prepared from lychee seeds and preparation method thereof
  • Biomass powdered activated carbon prepared from lychee seeds and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment example 1

[0021] A) Litchi stones obtained from fresh lychees sold in the summer without peels and fleshy arils (such as figure 1 (shown on the right) is the raw material, after washing, air-drying and air-drying, it is crushed with a jet vortex turbulence mill to a particle size of 1.0 mm;

[0022] B) Stir and mix according to the mass ratio of lychee core granules: potassium hydroxide: sodium hydroxide is 1:2:0.20, soak in water for 5 h and puff, then dry;

[0023] C) Fill the mixture of dried lychee core particles, potassium hydroxide and sodium hydroxide into a nickel reaction kettle, and then move it to a hierarchical tubular heating furnace. Under the protection of nitrogen, microwave radiation is used to raise the temperature. rate of 10 o C / min heated to 260 ℃ for 35 min and then heated at a rate of 5 o C / min heating to 660 o C rotation activation for 65 min, followed by natural cooling;

[0024] D) Rinse the above cooling material with 2 mol / L hydrochloric acid, then rinse ...

Embodiment example 2

[0026] A) Litchi stones obtained from fresh lychees sold in the summer without peels and fleshy arils (such as figure 1 shown on the right) is the raw material, washed, 90 o After C is heated and stirred and dried, it is pulverized to a particle size of 0.9 mm with a jet vortex turbulent pulverizer;

[0027]B) Stir and mix according to the mass ratio of lychee core granules: potassium hydroxide: sodium hydroxide is 1:3:0.1, soak in water for 4.5 h and puff, then dry;

[0028] C) Fill the mixture of dried lychee core particles, potassium hydroxide and sodium hydroxide into a nickel reaction kettle, and then move it to a hierarchical tubular heating furnace. Under the protection of nitrogen, microwave radiation is used to raise the temperature. rate of 10 o C / min heating to 290 o C fan rotary carbonization for 39 min, then at a heating rate of 5 o C / min heating to 760 o C rotation activation for 75 min, followed by natural cooling;

[0029] D) Rinse the above cooling mater...

Embodiment example 3

[0031] A) Litchi stones obtained from fresh lychees sold in the summer without peels and fleshy arils (such as figure 1 shown on the right) is the raw material, washed, 100 o After C is heated and stirred and dried, it is pulverized to particles with a particle diameter of 0.7 mm with a jet vortex turbulent pulverizer;

[0032] B) Stir and mix according to the mass ratio of lychee core granules: potassium hydroxide: sodium hydroxide is 1:3.5:0.05, soak in water for 3 h and puff, then dry;

[0033] C) Fill the mixture of dried lychee core particles, potassium hydroxide and sodium hydroxide into a nickel reaction kettle, and then move it to a hierarchical tubular heating furnace. Under the protection of nitrogen, microwave radiation is used to raise the temperature. rate of 10 o C / min heating to 340 o C fan rotary carbonization for 35 min, then at a heating rate of 5 o C / min heating to 840 o Rotational activation in the C range for 55 min, followed by natural cooling;

[0...

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Abstract

The invention discloses a biomass powdered activated carbon prepared from lychee seeds and a preparation method thereof. The prepared activated carbon has the specific surface area (SBET) of 1350-2450m<2> / g, the micropore specific surface area > of 97%, the pore volume (P / P0=0.95) of 0.62-1.16cm<3> / g, the micropore volume fraction > of 95%, the granularity of 2300-4500 meshes, the iodine value of 845-1545mg / g, the methylene blue adsorption value of 10.12-21.3Ml / 0.1g, the ash content of less than or equal to 0.15% and the resistance of 0.3-0.6 ohm. The lychee seeds are agricultural fruit crop wastes which are not effectively utilized at present and are sufficient in source, and other raw materials, equipment and the like used in the preparation process are used as usual and can be purchased on the market, so that the production cost of the activated carbon is effectively reduced.

Description

technical field [0001] The invention relates to a biomass activated carbon and a preparation method thereof, in particular to a biomass powder activated carbon with developed micropores and a large specific surface area prepared from litchi kernels and a preparation method thereof. Background technique [0002] Activated carbon (AC) is a porous carbon material with developed pore structure and large specific surface area, which has the advantages of stable physical and chemical properties, high mechanical strength, insoluble in water and organic solvents, and easy regeneration. It is an adsorbent and catalyst carrier with excellent performance, and is widely used in food processing, metallurgy, medicine, chemical industry, military, environmental protection and energy and other fields. With the ever-changing development of society, especially the global energy shortage and the sharp deterioration of the environment in the past two decades, the demand for activated carbon has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12C01B32/324C01B32/348
Inventor 温祖标朱杨军李平华于峰周攀李莉谭军艳
Owner JIANGXI NORMAL UNIV
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