Production of active carbon with Chinese chestnut

A technology of chestnut shell and activated carbon, which is applied in the field of preparation of chestnut shell activated carbon, can solve problems such as no production example reports

Inactive Publication Date: 2006-03-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chestnut shell activated carbon,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of crushed chestnut shell activated carbon and powdered activated carbon

[0019] The production process is as follows: remove dust and other impurities from chestnut shells, dry them at 105-140°C, grind them into fine powder with a particle size of 70% below 0.053mm, and mix them with a zinc chloride aqueous solution with a concentration of 0.15mol using a powerful mixer. , the addition of zinc chloride solution is 45% of the mass of chestnut shell fine powder, made into granules with a diameter of 4 to 5 mm, dried to remove moisture, and moved into a carbonization furnace at a temperature of 380 to 680 ° C and under oxygen barrier conditions. Carbonize for 240 minutes, first raise the temperature from 380°C to 680°C at a rate of 200°C per hour, and keep the temperature at 680°C for 150 minutes. The carbonized pellets are transferred to a vertical activation furnace, activated in a superheated airflow with a temperature of 550-650°C and a pressure of 0.08-0...

Embodiment 2

[0021] The production process of activated carbon from chestnut shells is as follows: wash chestnut shells to remove dust and other impurities, dry them at 105-140°C, grind them into fine powders with a particle size below 0.043mm, and mix them with zinc chloride solution with a concentration of 0.45mol using a strong mixer Mix evenly, add zinc chloride aqueous solution to 60% of the mass of chestnut shell fine powder, make spherical particles with a diameter of 4-5 mm, remove moisture after drying, and move into a carbonization furnace at a temperature of 380-680 ° C and separate Carbonization under oxygen conditions for 210 minutes, first heating up from 380°C to 680°C at a rate of 200°C per hour, and holding at 680°C for 120 minutes, the carbonized pellets are transferred to the vertical activation furnace, and the temperature is 550-650°C, pressure Activation in 0.08-0.15MPa superheated airflow for 45 minutes, then wash and dezincify with PH 2.5, 85°C hydrochloric acid solu...

Embodiment 3

[0023] Preparation of crushed chestnut shell activated carbon and powdered activated carbon

[0024] The production process is as follows: wash chestnut shells to remove dust and other impurities, dry them at 105-140°C, grind them into fine powders with a particle size of less than 0.038mm, and mix them with a zinc chloride aqueous solution with a concentration of 0.45mol using a powerful mixer. The amount of zinc chloride solution added is 75% of the mass of chestnut shell fine powder, made into granules with a diameter of 4-5mm, dried to remove moisture, moved into a carbonization furnace, and carbonized at a temperature of 380-680°C and oxygen barrier conditions For 200 minutes, first raise the temperature from 380°C to 680°C at a rate of 200°C per hour, and keep the temperature at 680°C for 110 minutes. The carbonized pellets are transferred to a vertical activation furnace, activated in a superheated steam flow with a temperature of 550-650°C and a pressure of 0.08-0.15MP...

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Abstract

Production of active carbon from Chinese chestnut shell as raw materials is carried out by collecting dust on Chinese chestnut shell, drying at 105-140 Deg C., grinding into fines with grain size <0.053mm, blending with 0.15-0.45mol zinc chloride solution, obtaining granule with 4-5mm diameter or normalized spherical granule, drying, transferring into carbonizing furnace, carbonizing without oxygen and at 380-680 Deg C. for 200-240mins, transferring into vertical activating furnace, activating at 550-650 Deg C. and 0.08-0.15Mpa for 30-45mins, washing and removing zinc for activated products by HCl solution with pH 2-2.5 and 85-95 Deg C., solid-liquid separating, washing to neutralization with water, drying solid materials, grinding and grading, and obtaining crushed active carbon or granular active carbon or spherical activate carbon.

Description

Technical field: [0001] The invention relates to an industrial production method of activated carbon, in particular to an industrial production method for preparing activated carbon from chestnut shells. Background technique: [0002] Activated carbon is a black porous solid material. The unique pore structure in the body makes it have a high specific surface area and surface functional groups. It has good chemical stability, mechanical strength, acid resistance, alkali resistance, heat resistance and other properties. It has strong adsorption capacity for gases, organic or inorganic substances in solution and colloidal particles. It is widely used in solution decolorization and refining in chemical production, gas purification, as catalyst and catalyst carrier. With the continuous expansion of the use of activated carbon, the demand is increasing day by day, and the research on activated carbon is becoming more and more in-depth. Focusing on improving product performance, ...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 刘理根陈俊
Owner WUHAN UNIV OF TECH
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