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Kenaf stalk activated charcoal and preparation method thereof

A technology of activated carbon and activated carbon particles, which is applied in the field of hemp stalk activated carbon and its preparation, can solve the problems of hemp stalk waste and waste, and achieve the effects of excellent performance, low cost and good economic benefits

Inactive Publication Date: 2008-05-21
THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country is the main producer of hemp, and the industry mainly uses hemp fiber to make textiles or paper, and a large number of hemp stalks are discarded, causing a lot of waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Grind the hemp rod core into a fine powder with a Raymond mill, sieve it, boil it in 0.5mol / L ammonium phosphate solution for 0.5h, and then knead it in a kneader, using coal tar as a binder, and the dosage is 2 %, and then plasticized in an oven at a temperature of 150°C for 5 minutes;

[0052] Put the plasticized hemp powder in a carbonization furnace with a nitrogen flow rate of 10mL / min, a carbonization heating rate of 3°C / min, a carbonization temperature of 400°C, and a carbonization time of 0.1 hour. The flow rate is 3ml / min.

[0053] Boil the activated product in 0.05mol / L HCl solution for 0.5h, then wash with deionized water to pH6; obtain the crude product; put the crude product in a drying oven to dry, and cool to room temperature , the finished hemp stalk granular activated carbon can be obtained through a hydraulic granulator; the diameter of the activated carbon particles is 0.001-10mm, and the specific surface area is 1200m 2 / g, the total pore volume is...

Embodiment 2

[0055] The ramie rod core is ground into fine powder with an ultra-fine mill, sieved, boiled in a 4.5mol / L ammonium phosphate solution for 2 hours, and then kneaded in a kneader, using coal tar as a binder, the dosage 10%, and then plasticized in an oven at a temperature of 250°C for 60 minutes;

[0056] The plasticized hemp powder was placed in a carbonization furnace with a nitrogen flow rate of 40mL / min, a carbonization temperature rise rate of 8°C / min, a carbonization temperature of 1000°C, and a carbonization time of 2 hours. The flow rate is 8ml / min.

[0057] The activated product was first boiled in 1.5mol / L HCl solution for 2 hours, and then repeatedly rinsed with hot deionized water and cold deionized water to pH7; the crude product was obtained; the crude product was put into Dry in a drying oven, cool to room temperature, and pass through a hydraulic granulator to obtain the finished hemp stalk granular activated carbon; the diameter of activated carbon particles i...

Embodiment 3

[0059] Crush the jute stalk core into fine powder with a hammer crusher, sieve it, boil it in 2.5mol / L polyphosphate solution for 1 hour, and then knead it in a kneader, using coal tar as a binder, and the dosage is 5%, and then plasticized in an oven at a temperature of 200°C for 10 minutes;

[0060] Put the plasticized hemp powder in a carbonization furnace with a nitrogen flow rate of 30mL / min, a carbonization heating rate of 7°C / min, a carbonization temperature of 600°C, and a carbonization time of 1 hour. The flow rate is 4ml / min.

[0061] The activated product was first boiled in 1mol / L HCl solution for 1 h, and then rinsed repeatedly with hot deionized water and cold deionized water to pH 6.5; the crude product was obtained; the crude product was placed in Dry in a drying oven, cool to room temperature, and pass through a hydraulic granulator to get the finished hemp stalk granular activated carbon; the diameter of activated carbon particles is 0.001-10mm, and the spec...

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Abstract

The invention relates to a flax straw activated carbon (flax carbon) and a preparation method thereof, which is obtained from flax straws which go through pretreatment, carbonization, activation, rinsing and drying and molding. The flax straw activated carbon prepared according to the invention has a specific surface area of 1200 to 1800m<2> / g, total pore volume is 0.8 to 1.0cm<3> / g. The particle diameter of the flax straw activated carbon is 0.001 to 10mm; benzene adsorptive value is 80 to 120mg / g; stacking density is 0.25 to 0.30g / m<3> and intensity is larger than 92 percent. The invention has an extremely good adsorptive property.

Description

technical field [0001] The invention relates to a hemp stalk activated carbon (hemp charcoal) and a preparation method thereof. Background technique [0002] Adsorption is an important technology in the process of separation and purification. Among many adsorption materials, activated carbon has been most widely used because of its large adsorption capacity and low cost. The preparation method of activated carbon is usually heat treatment under activation conditions, that is, two steps of carbonization and activation. The purpose of carbonization is to obtain initial pores suitable for activation and carbonized materials with certain mechanical strength. The essence of carbonization is the process of pyrolysis of organic matter in raw materials, including thermal decomposition reaction and polycondensation reaction. The activation process is a key step in the preparation of activated carbon with high specific surface area. The activation methods include physical activation...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 张建春郝新敏杨儒张华闻克渝
Owner THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME
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