Method for producing activated carbon from spartina alterniflora stalk

A technology for producing activated carbon and Spartina alterniflora, which is applied in the field of ecological engineering, can solve the problems of lack of activated carbon raw materials, low utilization rate of Spartina alterniflora, etc., and achieves a carbon content rate that is green and non-toxic, has good industrial application prospects, and is widely distributed. Effect

Inactive Publication Date: 2008-09-17
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low utilization rate of Spartina alterniflora and the shortage of activated carbon raw materials in the prior art, to provide a kind of carbonization method using Spartina alterniflora stem as raw material, which has little environmental pollution and can make full use of Spartina alterniflora. The preparation method of activated carbon is economical and simple in terms of resource and preparation process, so as to obtain a kind of activated carbon based on Spartina alterniflora with low price and good adsorption performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Clean the stems of Spartina alterniflora with deionized water, dry them at 105° C., and then grind the stems of Spartina alterniflora into 100-mesh Spartina alterniflora stem powder with a pulverizer. Soak Spartina alterniflora stem powder and 20% phosphoric acid with a mass ratio of 1:2 for 12 hours, put the soaked Spartina alterniflora stem powder into a vacuum desiccator for drying and put it into a tube furnace , under the protection of a nitrogen flow of 50ml / min, the temperature was raised to 400°C at 5°C / min, and carbonized at this temperature for 2 hours, and then the temperature was raised to 700°C at 10°C / min for activation for 0.1 hour. After cooling, roughly wash with distilled water to recover phosphoric acid, and then wash with distilled water until the pH is 6.5. Finally, put the cleaned product into an oven and dry it at 105°C to obtain activated carbon. According to the national standard (GB12496.1-22-1999) test, the main index-methylene blue adsorptio...

Embodiment 2

[0028] Clean the stems of Spartina alterniflora with deionized water, dry them at 105° C., and then grind the stems of Spartina alterniflora into 100-mesh Spartina alterniflora stem powder with a pulverizer. Soak Spartina alterniflora stem powder and 20% potassium hydroxide at a mass ratio of 1:2 for 12 hours, put the soaked Spartina alterniflora stem powder into a vacuum desiccator for drying, and put it into a tube In the furnace, under the protection of a nitrogen flow of 50ml / min, the temperature was raised to 400°C at 5°C / min, and carbonized at this temperature for 2 hours, and then the temperature was raised to 700°C at 10°C / min for activation for 1 hour. After cooling and recovering potassium metal, wash with distilled water until the pH is 7.5. Finally, put the cleaned product into an oven to dry at 105°C. According to the national standard (GB12496.1-22-1999) test, the main index-methylene blue adsorption value is 21.5mL / 0.1g, and the national standard methylene blue...

Embodiment 3

[0030] Clean the stems of Spartina alterniflora with deionized water, dry them at 105° C., and then grind the stems of Spartina alterniflora into 100-mesh Spartina alterniflora stem powder with a pulverizer. Soak Spartina alterniflora stem powder and 20% phosphoric acid with a mass ratio of 1:2 for 12 hours, put the soaked Spartina alterniflora stem powder into a vacuum desiccator for drying, and put it in a carbonization furnace. Under the protection of a nitrogen flow of 50ml / min, the temperature is raised to 450°C at 5°C / min, and carbonized at this temperature for 2 hours, and then the temperature is raised to 750°C at 10°C / min for activation, and the gas is converted into water vapor , constant temperature activation for 0.5 hours. After cooling, roughly wash with distilled water to recover phosphoric acid, and then wash with distilled water until the pH is 6.5. Finally, put the cleaned product into an oven to dry at 105°C. According to the national standard (GB12496.1-2...

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Abstract

The invention discloses a method for producing an active carbon by utilizing a stalk of spartina alterniflora. The step of the invention is characterized in that rinsing, drying and then crushing the stalk; putting the crushed spartina alterniflora stalk powder into a phosphoric acid or a potassium hydroxide solution, stirring up evenly and soaking, then separating the solid and the liquid; the separated spartina alterniflora stalk powder is positioned in a tubular oven or a carbonizing oven after drying and carbonizing under the nitrogen protection; continuing to charge the nitrogen or an activation gas to activate after carbonizing; the activated spartina alterniflora stalk powder is rinsed by water, and the active carbon is got after drying. The method for producing the active carbon has the advantages of using the high carbonaceous invasive species apartina alterniflora to act as the raw material, making the active carbon low price and good adsorption performance through the simple, safe, and high efficient process, and realizing to utilize the spartina alterniflora as a resource.

Description

technical field [0001] The invention belongs to the technical field of ecological engineering, and in particular relates to activated carbon produced from Spartina alterniflora stems and a preparation method thereof. Background technique [0002] Activated carbon is a material with developed pore structure and large specific surface area. It has strong adsorption capacity for organic matter or heavy metals and colloidal particles in gas and solution. It is insoluble in water or organic solvents, easy to regenerate, and has sufficient chemical stability. , mechanical strength and acid and alkali resistance, heat resistance and other properties. Therefore, it is widely used in the fields of environmental protection, catalysis, food, medicine, separation, and national defense, and has become an important functional material that is indispensable for national economic development, national defense construction, and daily life. [0003] The traditional raw materials for activate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08
Inventor 郑正李坤权聂耳黄兴发朱剑飞赵国华冯景伟高顺技罗兴章张继彪
Owner NANJING UNIV
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